When W G Armstrong, Whitworth & Co received a contract in 1914 to build B.E.2 aircraft for the Royal Flying Corps and the Royal New Zealand Air Service, it offered to design and build a simpler but equally efficient two seat trainer aircraft instead. Similar in configuration to the B.E. in its initial state, with separated cockpits for pilot and observer, the Frederik Koolhoven designed F.K.3 construction started in August 1915.
Production versions incorpo¬rated a tandem crew cockpit with the pilot seated forward and a more efficient tail design. The prototype F.K.3 had a 120 hp Austro Daimler engine, but most production models had the 90 hp RAF la, while a few had the 105 hp RAF lb.
Approximately 500 F.K.3s were ordered for RFC use, the bulk of which were allotted to training units where they gave service until the end of hostilities.
F.K.3
Only one RFC squadron used F.K.3s operationally; 47 Squadron in Macedonia, where they became a bomber and general reconnaissance machine from late 1916 until the Armistice. On October 31, 1918, the RAF had a total of 62 F.K.3s still on charge. At least four of these went onto the post 1918 Civil Register as G-¬EABY (ex 119629), G EABZ (ex-B9518), G EAEU (ex-B9612) and G EALK (ex-B9603).
Engine: RAF.1a, 90 hp or Beardmore, 120 hp Span: 12.2 m (40 ft) Length: 8.8 m (29 ft) Height: 3.6 m (11 ft 10.75 in) Empty weight: 762 kg / 1682 lb Loaded weight: 932 kg / 2056 lb Maximum speed: 142 km/h (88 mph) at 1980 m (6500 ft) Service ceiling: 3962 m (13 000 ft)
Between March 11 and 16, 1938, tests were carried out on an experimental version of the SB equipped with an open cockpit for the instructor pilot, located in the position of the navigator’s cockpit.
For this purpose, a series SB was taken from the production batch of Factory 22 and equipped with a second cabin with double control and all the necessary instrumentation for the instructor. First flying in March 1938, this cabin was designed in such a way that it could easily replace the navigator’s cabin directly in the operational units.
After the tests, which were favourable, a small series was developed as the Arjanguelsky USB (Russian: Архангельский УСБ). During 1938, 110 cabins were prepared for instructors, of which 29 were located in new aircraft and the other 81 were delivered to the units for operational conversion.
At least one was captured by the Finnish forces during the Winter War, being used by T-LeLv 17 of their Air Force.
USB captured by the Finns and operated by T-LLv 17, summer 1943.
USB Engines: 2 x М-100А, 860 hp Wingspan: 20.33 m Length: 12.57 m Height: 3.48 m Wing area: 256.00 m² Empty weight: 4138 kg Normal takeoff weight: 5738 kg Maximum speed: 425 km / h Cruising speed: 315 km / h Ascent speed: 437 m / min Practical ceiling: 9000 m Practical range: 900 km Accommodation: 3
The war in Spain showed the obsolescence of the “fast” SB bombers. In an attempt to improve performance, the Arjanguelsky MMN had been developed with M-105 engines, but the results had not been as expected. In parallel, solutions had been developed to increase the range and fire capacity.
Already in 1939 the specialists of the NIP AV VVS together with the NII VVS and the TsAGI, developed the methodology for dive bombing for the SB bomber. The tests of the dive bomber SB had participated the crews of Major Zhdanov, Captain Kobalchuk and Major Lieutenants Subbotin and Piskunov.
As a result of this work, recommendations were created for the flight personnel of the operational units related to the use of the SB dive bomber, which was followed by the request to modernize the aircraft and its weapons.
SB aircraft with M-103 and M-104 engines had participated in the dive tests. The SB 2M-104 aircraft performed poorly due to problems with this engine. For the same reasons, the operational tests in the operating units of the SB with this engine were also unsuccessful.
Under these results the resolution No.230 of 29 July 1939 would see the SNK USSR establishing responsibility from January 1940 modernized copies SB 2M-105 with a rate productive no less than 1939 and from March introduce the version with M-106 engines and speed no less than 500 km / h from Factory No.22.
The October of 1940 the director of the Factory No.22 Okulov and Arjangelsky sent a letter to the NKAP (НКАП or People ‘s Committee for Aviation Industry) with satisfactory results of tests radiators inserted in the wing of the SB bomber with Klimov M-105 engines.
This new location considerably improved the aerodynamics. Authorization was received to continue experimenting with the new model that received the designation SB-RK (СБ-РК – Cамолет СБ с Радиаторами в Крыле – SB with wing radiator).
The field testing of five SB 2M-105 standard bombers with vish-22Ye chopped propellers began on 15 July 1940. In these, the PB-3 supports were installed. The second of these SB-RK N1 / 281 for the first time was equipped with aerodynamic brakes and an automatic dive system.
This equipment was produced by Factory No. 213 in Moscow. Testing of this SB-RK version took place between July 27 and August 11, 1940.
SB-RK prototype
In parallel, an attempt was made to try to use the RS reactive rockets in a dive. As a result, it was found that the reactive force of these rockets in the SB affected the structure of the ailerons, so the decision was made not to use them in this aircraft.
Throughout this process and taking into account the results of the tests of the experimental models MMN 2M-105 and SB-RK 2M-105 and the development of the short-range bomber SB-B, the modernization process was continued.
From Resolution No.240 of the SNK USSR issued on 1 June 1940, the factory No.22 was tasked to prepare three SB-RK with improved aerodynamics for testing by August 15. It was required to obtain a maximum speed of 490 km / h at the height of the practical ceiling.
The general configuration, which was not modified, was that of a metal-built, cantilever mid-wing monoplane, fitted with a retractable tail wheel landing gear. The wingspan was reduced by 2.33 m, which led to the reduction of the wing area to only 48.7 m².
The engine exhaust pipes were modified to improve aerodynamics as well as the shape of the cowls. A reduction in the weight was also obtained by 270 kg, of which 110 kg were obtained by modifying the wing, 87 kg by modifying the engines and cowls and 70 kg by modifying the radiators.
The pre-series SB-RK models replaced the nose of the SBs with the new F-1 bow section, with better aerodynamic lines, originally introduced on the Arjanguelsky MMN model. Another significant change was the modification of the shape of the canopy of the gunner-radio operator’s cabin, which lost height, reducing drag.
Other changes related to the construction of the plane were made. The coating of the extrusions in the centroplane, between frames 4 and 8, was made with bakelite plywood fixed with VIAM glue to the wood planes of frames 5, 6 and 7.
Important modifications were made to the drive structures by equipping the aircraft with new mounts and cowls. The radiators and the oil cooling system were modified. Fuel tanks were installed in the wing consoles with a capacity of 330 liters and new VISh-22Ye propellers of 3 meters in diameter and variable pitch.
The modification made to the nose of the aircraft made it possible to improve the navigator’s working conditions and guarantee communication with the pilot. In this position, the ability to control the aircraft was also installed in cases where the pilot was injured. Relative to the nose used on the Arjanguelsky MMN, the SB-RK featured enlarged glazing.
In order to provide the pilot with downward visibility through the navigator’s glass during landing and dive, his seat was moved to the left and the instrument panel to the right.
The aiming during the bombardment in horizontal flight was guaranteed by an NKPB-3 collimator designed to operate at night and at low altitude and another of the OPB-1M type, both located in the navigator’s cabin.
To ensure target tracking during dive bombing, the pilot had a PBP-1 collimator. An artificial dive horizon and an overload signal were installed on the instrument panel.
Under the wing consoles were installed mesh brakes with hydraulic operation system and an automatic dive exit system that was activated once the bombs were launched.
When diving and after releasing the command key, the aerodynamic brakes were extended perpendicular to the air flow. The pilot could know that the brakes were extended by means of mechanical markers that rose above the covering of the wing surface, between the 10 and 11 of the consoles.
The elevator trimmers were automatically raised, forcing them to descend. Once the bomb launch button was pressed, the trimmers returned to their normal position.
The defensive armament included three 7.62mm ShKAS machine guns positioned:
one in the nose with a mechanical collimator located in a spherical turret with 500 rounds and operated by the navigator capable of firing in a 50º cone;
one with a K-8T type collimator on the TSS-1 upper turret with 1000 shots covering the upper rear area. This machine gun could fire at 90º to the left and right, up to 60º upwards and up to 30 degrees downwards;
one with OP-2L collimator located in a retractable MV-2 turret in the ventral region with 600 projectiles capable of covering up to 30º to both sides and 55º downwards.
TSS-1 turret at the top and MV-2 at the bottom
The bombing system was also improved in relation to the standard SB. In dive flights, the new model could carry 4 FAB-250 250 kg bombs (two in the external supports and two in the internal ones) or three FAB-500 bombs (two in the external supports and one in the internal one), using the NP-1 brackets developed at Factory No.22.
During the horizontal flight bombardment, three FAB-500s or six FAB-250s (four external and two internal) or 12 FAB-100 bombs (4 external and 8 internal) could be transported. The normal capacity of pumps was raised to 1000 kg, reaching 1500 in the overloaded version.
The SB-RK could also carry two VAP-500 type chemical weapons containers and two UJAP-500 universal chemical dispensers, located on the outer brackets. These two containers guaranteed to be able to use all the types of substances in the arsenal of the VVS.
With these modifications the speed increased by almost 60 km / h, the ceiling also increased to reach 10,100 meters and the range to 1,500 km, without detriment to the landing characteristics.
In October 1940, factory tests began on the first SB-RK prototype, which was selected as the basis for series production. By November 11, 11 flights had been made.
The results of these tests showed that overheating of the water and oil was recorded. Directional stability was not assessed as positive either.
On October 29, the second pre-series copy would leave the production workshops, which was used to test the weapon system. By this time the third copy was finished, which was delivered to the NII VVS for the development of state tests.
At the forefront of these tests was military engineer MI Yefimov. The test pilots were Major VI Zhdanov and Captain AM Khripkov. The tests were completed in January 1941 and the report of conclusions was signed by the head of the NII VVS General-Major AI Filin on January 20, 1941.
On January 31, this document was put for the signature of the head of the Main directorate of the VVS General-Lieutenant PV Rychagov. From 9 December of 1940 and under the order No.704 NKAP, the experimental model SB-RK was redesignated Ar-2. Around 1940 the Soviet denomination system had changed. According to the new system, each model reflected the origin of its design, using the first two letters of the name of the office or designer responsible for it, therefore the SB-RK was renamed Arjanguelsky Ar-2 (Russian: Архангельский Ар-2).
SB-RK during flight tests
During the state tests, it was possible to reach a maximum speed of 475 km / h at 4,700 meters high with a weight of 6,600 kg. The ascent time to 5000 meters was set at 7.1 minutes.
With normal flight weight, the ceiling exceeded 10,000 meters and with a weight of 7,100 kg and two FAB-250 bombs on external supports, 9,000 meters were reached. The technical range with two FAB-250 bombs, flying at 5000 meters at a speed of 390 km / h was 990 km. The take-off run was 340 meters.
In the tests, it was possible to maintain flight with a single engine and 25 dives were made with angles between 40 and 75º, with the aerodynamic brakes retracted and extended in order to be able to measure the behavior of the plane in this maneuver.
Dives were also carried out with the launch of bombs. The dive speed was about 275 – 295 km / h at a height of 4000 meters. The initial exit speed of the dive was 550 km / h with a registered overload of 4.5 units.
The main problems were linked to the power plant. In winter conditions of -10º C, the water temperature reached values close to the maximum allowable, which meant that it would be impossible to use the plane in the summer. The engine oil was also reaching 110 degrees and the system was problematic. During the tests, 12 changes were made to the water and oil radiators.
Although the M-105 engines were fitted to the Ar-2 well after their tests at the unsuccessful Polikarpov SPB, they were not yet ready for production.
It was pointed out that the 7.62 mm machine guns did not guarantee the necessary defense in the conditions of modern combat, but this was a deficiency of practically all the Soviet models of the time, so it was not considered so important.
The report concluded: “The Ar-2 aircraft, produced on the basis of the SB aircraft, considerably exceeds the SB series aircraft due to its performance, but due to its speed it does not exceed modern domestic or foreign medium bombers … The characteristics of Ar-2 flights are similar to those of the SB, but the control is lighter.
For its control and visibility of the pilot can be flown in formation … The plane Ar-2 will enter service with the units of the VVS of the Red Army provided with limited use their motive power … “
In February 1941, the Ar-2 N1 / 511 was delivered to the NII VVS, which tried to resolve the indications of the first tests. In this example the M-105R engines (version made for use in bomber aircraft. It is characterized by the reduction of the reduction ratio, a power of 1100 horsepower) were moved forward by 150 mm with the aim of improving directional stability.
New 3.1 meter VIT1T-22E propellers were installed. The drive reduction was modified to take better advantage of the new propellers. New, more compact louver aero brakes and reactive tailpipes were fitted to harness the exhaust gases to generate additional thrust.
They worked with special interest in improving the finish of the plane’s surface. This allowed obtaining a maximum speed at sea level of 443 km / h and 512 km / h at 5000 meters.
It seems that it only remained to improve the aerodynamics a bit and improve the armament to achieve the dive bomber desired by the VVS, but luck was not in favor of the Ar-2. The successes achieved by the PB-100 (Petlyakov Pe-2), which had managed to reach 540 km / h in tests without difficulty, demonstrated the potential of this model, which would soon begin to be mass-produced at factories No. 22 and No.39.
series Ar-2 from 1941
Moreover, the 29 of January of 1941 made its first flight dive bomber “103” 2 AM-37, designed from the outset for this purpose and predecessor of the renowned Tupolev Tu-2. From the first tests, the VVS hoped to obtain an attack aircraft capable of outperforming all known models of this type, both domestic and foreign.
As a result of these changes in the environment issued November to February of 1941 the resolution of the Defense Committee which suspended mass production of the bomber Yakovlev Yak-4 (formerly BB-22 2M-105) in the factory No.81 and of the Arjanguelsky Ar-2 2M-105 at Factory No.22.
As AA Arjanguelsky had been in charge of the development of the MoV-2 project with an AM-38 engine, as of April 10 and by virtue of NKAP order No. 309, the entire work group was transferred to the Factory. No.32 to be in charge of the projection and production of this model.
Much has been argued about this decision. Although the Petlyakov Pe-2 had higher speed than the Ar-2, it actually also had several drawbacks: it had a lower offensive load capacity, had poor take-off and landing characteristics, which caused 30% of the model’s losses and was a new aircraft, while the Ar-2 was a derivative of the well-known SB, which greatly facilitated unit conversion.
Post-war analyzes have theoretically shown that the Ar-2 may have been more effective than the Petlyakov Pe-2 in the dive bomber role, being second only to the Tupolev Tu-2. This disadvantage of the Pe-2 increased in the final period of the war. Upon entering enemy territory, the VVS encountered a large number of well-defended objects and solid constructions (bunkers and fortified constructions) that required great explosive power to destroy them.
Under these conditions, the low capacity of the Pe-2 was insufficient and the large Petlyakov Pe-8 bombers were too vulnerable to antiaircraft defense. The Ar-2 may have played a far more significant role at this stage of the contest with its ability to dive 6 FAB-250 or 3 FAB-500 bombs on these targets.
Some 190 copies were produced before production at Factory No.22 was reassigned to the Petlyakov Pe-2 in the first half of 1941.
Arjangelsky continued work to improve the design of the SB on other models, the most prominent of which was the SB-B.
Since 1940, the Ar-2 was assigned to units already equipped with the SB bomber, which made it possible to speed up the transition process to the new model.
Ar-2 in Ukraine in 1941
For 1 of June of 1941 in units of SVV 164 copies Ar-2 2M-105, of which 147 (three out of service) located directly in combat units, the remaining units of the direction of were VVS and at Factory No.22.
In the initial conditions of the war, with the withdrawal of the Soviet forces and the lack of organization of the fighting forces, the Ar-2 bombers were unable to show their potential. On the other hand, the lack of air coverage and the poor preparation of many crews, contributed to the fact that a large number of these aircraft were lost in the first months of the war. According to the official data of the VVS, the losses of Ar-2 in 1941 accounted for 95 copies.
A certain quantity of Ar-2 remained operational until 1943.
It is noteworthy that the management and specialists of the Naval Fleet Aviation (AVMF), when creating the manning plans for their units for 1941, requested the Ar-2 as the main dive bomber and the Pe-2 as acting hunting escort. Unfortunately this request was not honored.
Units that used the model: In the VVS: 2 SBAP of the 2 SAD 46 SBAP of the 7SAD 54 SBAP of the 54 SAD 13 SBAP of the 9 SAD 33 BAP of the 19 BAD 27 IAP (Fighter squad that used the model as a trainer in dive bombing)
In the VMF: 73 BAP of the 10 SAD in the Baltic Fleet
SB-RK prototype
SB-RK Prototype Engines: 2 x 1050 hp Klimov M-1 05 Propellers: VISh-22E Wingspan: 18.00 m Length: 12.27 m Wing area: 48.2 m² Empty weight: 4430 kg Normal take-off weight: 6300 kg Wing loading: 131kg / m² Maximum speed at sea level: 410 km / h Maximum speed at 4700 m: 480 km / h Cruising speed: 320 km / h Ascent time to 5000 m: 7.25 min Service ceiling: 10 100 m Practical range: 1500 km Armament: 4 x ShKAS 7.62 mm machine guns Internal bombload: 600 kg External bombload: 1,500 kg Crew: 3
Ar-2 serial from 1940 Engines: 2 x 1100 hp Klimov M-105R Wingspan: 18.00 m Length: 12.50 m Wing area: 48.2 m² Empty weight: 5106 kg Normal take-off weight: 6600 kg Maximum takeoff weight: 8150 kg Wing loading: 139 kg / m² Maximum speed at sea level: 415 km / h Maximum speed at 4700 m: 475 km / h Ascent time to 5000 m: 7.1 min Practical range: 1500 km Service ceiling: 10 100 m Armament: 3 x 7.62 mm ShKAS machine guns Internal bombload: six 100kg bombs, or two 250kg bombs, or one 500kg bomb External bombload: up to 1000kg of bombs underwing (500kg under each wing) Crew: 3
1941 serial Ar-2 Engines: 2 x 1100 hp Klimov M-105R Wingspan: 18.00 m Length: 12.78 m Wing area: 48.2 m² Empty weight: 6500 kg Normal take-off weight: 7200 kg Wing loading: 135 kg / m² Maximum speed at sea level: 443 km / h Maximum speed at 4700 m: 512 km / h Time to 5000 m: 6.55 min Service ceiling: 10 100 m Practical range: 1500 km Armament: 3 x 7.62 mm ShKAS machine guns Internal bombload: six 100kg bombs, or two 250kg bombs, or one 500kg bomb External bombload: up to 1000kg of bombs underwing (500kg under each wing) Crew: 3
The Arado Ar 240 was designed by Walter Blume to an RLM 1938 response to replace the twin engine, two seat Messerschmitt BF 110 Zerstorer heavy fighter.
Intended to be produced as a high-speed and high-altitude reconnaissance aircraft, night fighter and bomber, the first prototype flew on 10 May 1940. Two prototypes and pre-production aircraft were completed and tested – most as reconnaissance aircraft but including examples for other roles – until 15 aircraft had been built by October 1942. The third prototype had the fuselage lengthened of 1,25 m, (12m 80 m), and equipped with 2 MG 17 of 7,92 mm in the wing root and 2 barbettes, 1 dorsal and 1 ventral, each with one 2 MG 81 of 7,92 mm.
The design was to feature a fully pressurized cockpit for two, remote-controlled operated armament and a specially designed lift flap. In addition to its heavy fighter role, the Ar 240 was to be a dive bomber as well, complicating the Ar 240 design further with the introduction of a dive braking system. The end product was a progressively heavy-laden design.
The Ar 240 was a traditional twin-engine layout with engines on a mid-mount monoplane wing. Crew was a pilot and navigator/gunner. The navigator/gunner manning two remote-controlled fuselage barbettes, each mounting twin 7.92m MG81 machine guns. An additional 2 x 7.92mm MG17 machine guns were available in fixed positions as well.
With the Ar 240A-0 series, the system had reach production stages. The definitive design would end up being the multi-purpose Ar 240C series of which several major variants would be developed. The Ar 240C version had a new aerofoil with the modified profile.
The type was used in the unarmed reconnaissance role over England during the operational trials phase of the development.
With no decision as to the best role for the aircraft, the programme was terminated in late 1942. A total of 14 were built. A few completed aircraft were taken into service by the Luftwaffe and used on the Eastern Front. Maximum level speed of the ninth aircraft, powered by two 1,304kW Daimler-Benz 603A-2 engines, was 730 km/h.
Ar 240V-2 – Second Prototype Model; larger ailerons, additional vertical fin on dive braking system and inclusion of smallish radiators for improved cooling.
Ar 240V-3 – Third Prototype Model; fitted with Arado / DVL FA 9 rear-firing weapons system; armament consisted of 1 x 7.92mm MG 81Z machine gun.
Ar 240V-4 – Fourth Ordered Prototype; first in series to include operational dive brake system.
Ar 240V-5 – Fifth Ordered Prototype; fitted with updated FA 13 weapon system consisting of 2 x 13mm MG 131 cannons.
Ar 240V-6 – Sixth Prototype Model
Ar 240A-0 – Initial Production Model Series; high-altitude reconnaissance variant; four preproduction aircraft produced.
Ar 240B-0 – Proposed Fighter-Bomber/Reconnaissance Variant.
Ar 240C-0 – Multi-Role Platform
Ar 240C-1 – Heavy Fighter Variant
Ar 240C-2 – Night Fighter Variant
Ar 240C-3 – Light Bomber Variant
Ar 240C-4 – High-Altitude Reconnaissance Variant
Ar 240E-0 – Dedicated Bomber Variant
Ar 240F-0 – Dedicated Fighter Variant
Specifiactions:
Prototype Engines: 2 x Daimler Benz 601A, 1075 hp Propellers: metal three-bladed variable pitch Wing span: 14,33 m Length: 11,55 m Height: 3,95 m Wing area: 31,30 m².
Ar 240A Engines: 2 x Daimler Benz DB 601E, 1175 hp Propellers: metal variable pitch Wingspan: 14,33 m Length: 12,80 m Height: 3,95 m Wing area: 31,30 m² Empty weight: 6200 kg MTOW: 9450 kg Wing loading: 301,916 Kg/m² Power loading: 4,021kg/hp Max speed: 620 Kmh at 6000 m Cruise: 555 Kmh to 6000 m ROC: 6000 m in 11 min Ceiling: 10500 m Range: 2000 km Crew: 2 Armament: 2 MG 17 7,92 mm, 2 Mg 81 7,92 mm.
Engines: 2 x BMW 801TJ, 1880 hp Propellers: metal variable pitch Wingspan: 14,33 m Length: 12,80 m Height: 3,95 m Wing area: 31,30 m² Empty weight: 6200 kg MTOW: 9450 kg Wing loading: 301,916 Kg/m² Power loading: 4,021kg/hp Max speed: 620 Kmh at 6000 m Cruise: 555 Kmh to 6000 m ROC: 6000 m in 11 min Ceiling: 10500 m Range: 2000 km Crew: 2 Armament: 2 MG 17 7,92 mm, 2 Mg 81 7,92 mm. Number built: 1
Engines: 2 x Daimler Benz DB 603A, 1750 hp Propellers: metal variable pitch Wingspan: 14,33 m Length: 12,80 m Height: 3,95 m Wing area: 31,30 m² Empty weight: 6200 kg MTOW: 9450 kg Wing loading: 301,916 Kg/m² Power loading: 4,021kg/hp Max speed: 620 Kmh at 6000 m Cruise: 555 Kmh to 6000 m ROC: 6000 m in 11 min Ceiling: 10500 m Range: 2000 km Crew: 2 Armament: 2 MG 17 7,92 mm, 2 Mg 81 7,92 mm. Number built: 1
Ar 240B Engines 2 x Daimler Benz DB 605A, 1475 hp Empty weight: 6950 kg MTOW: 8900 kg Max speed: 630 Kmh at 6055 m Cruise: 580 Kmh at 6055 m Range: 1910 km
Ar 240C Engines: 2 x Daimler Benz DB 603A-2, 1750 hp Max speed: 676 Kmh Armament:, 4 x 20 mm MG 151/20 in nose, 2 x MG 131 13 mm in barbettes, and 2 x 20 mm MG 151 in a ventral careenage.
Development of the Ar 234 began in 1940 at Arado’s Brandenburg plant. The German Aviation Ministry issued an order to Dr. Walter Blume, technical director of the state-owned Arado concern, to design and build a reconnaissance aircraft propelled by the turbojet engines then under development by BMW and Junkers. Rüdiger Kosin led the design team. Initially designated the E 370, Kosin created a high-wing monoplane with two turbojet engines mounted in nacelles under the wings. The rear fuselage contained two downward-looking reconnaissance cameras. The Luftwaffe specification called for the new aircraft to have a range of 1,340 miles. To house sufficient fuel in the fuselage to meet this difficult requirement, Blume had to dispense with a conventional undercarriage. The aircraft would take off from a wheeled trolley, which would be released as soon as it got airborne. The landing would be made on three retractable skids, one under the fuselage and one under each engine.
The calculated performance figures for the E 370 were a maximum speed of 485 mph at 20,000ft, a maximum operating altitude of more than 35,750ft, and a maximum range, excluding reserves, of 1,250 miles. The range was down on the stated requirement, but the Luftwaffe Technical Office approved the design and ordered the construction of two prototypes. At that point the aircraft received its official designation: Arado Ar 234. By the end of 1941 the two Ar 234 prototypes were almost complete, except for their engines. The fuselage of the Ar 234 was a circular section, semi monocoque structure with flush riveted stressed skin with a single seat cockpit in the extreme nose. The centre section, in the region of the wing and landing gear attachments, was of reinforced box girder construction. The radio equipment and tail braking parachute were stowed in the rear fuselage.
Ar234V6
This all metal cantilever monoplane’s wings were made in one piece, each a two spar structure with a flush ¬riveted stressed skin covering. The Frise ailerons had mass balanced geared tabs on their inner ends and hydraulically operated flaps were mounted inboard and outboard of the jet engines. Outboard of the jet engines were three inset lugs for the attachment of Walter 109-500 liquid fuelled rocket booster pods to assist take off. Each pod developed 1,100 lb thrust for 30sec. When the fuel was exhausted the pods parachuted to earth for reuse. The metal fin had a detachable wooden leading edge, behind which was a radio aerial. The all metal rudder had tabs along its entire trailing edge, the upper tab being geared and the lower controlled from the cockpit. The cantilever tailplane was an all metal stressed skin structure, pivoted on self aligning bearings at the leading edge. Incidence of the entire surface could be varied by a screwjack controlled by a lever in the cockpit. The narrow chord metal elevators had no trim tabs, and a single mass balance weight in the fuselage served for both the elevators and rudder. The fuel capacity was 836 Imp.gal, contained in the two fuselage tanks, one aft of the cockpit and one aft of the wing attachment fittings. There was provision to carry one 66 Imp.gal drop tank under each engine. Some aircraft were fitted with two 20mm MG 151/20 cannon in a fixed rearward firing mounting. Sighting was by means of a PV1 B periscopic gunsight, when turned to look rearwards. The gunsight graticule was reversed and inverted, so the pilot saw the target aircraft back to-front and upside down, and would then fly the Arado to place the sight on the target as if the aircraft he was engaging was in front of him. There is little evidence that the system was used successfully in action. A standard load for operations would be 1,100 lb, comprising either a high ¬explosive bomb or a cluster bomb unit carried beneath the fuselage. Although Arado completed the Ar 234 V1 airframe in late 1942, the Junkers company encountered severe problems in trying to get its new turbojet engine to run controllably and with a reasonable running life. Not until February 1943 did Arado receive its first pair of 004 engines, and these were not flight ¬cleared. They were installed in the Arado 234V1 first prototype, which then underwent static ground running and taxying trials. In the late spring of 1943 two flight cleared Jumo 004s finally become available. Even before it made its maiden flight, the aircraft was being considered for the bomber role. The subject arose at a conference at the Air Ministry in Berlin on July 1943.
Ar 234B
The Ar 234 V1 did not fly until July 30, 1943, from Rheine Airfield near Munster, with Flugkapitan Selle at the controls. There was a problem with the take off trolley. As briefed, Selle released the trolley when the aircraft reached 200ft. It fell away cleanly, but the retarding parachutes failed to deploy fully and the trolley was wrecked on hitting the ground. The company rushed a replacement trolley to Rheine for the second flight, but that was also destroyed after the parachutes again failed to open properly. After these mishaps it was decided to release the trolley when the aircraft reached flying speed, and thereafter it seldom left the ground. Further prototypes followed including the Ar 234 V6 and Ar 234 V8 which were powered by four 800 kg (1,764 1b) thrust BMW 003A-1 turbojets. The test programme gradually gained momentum, although there was a setback on October 2 when Selle was killed when the second prototype crashed during a test flight. By the end of September 1943 three further Ar 234 prototypes had flown, and a bomber version was under active consideration. The Air Ministry directed Arado to redesign the landing gear and give the jet a bombing capability and ordered two prototypes of a new version, the Ar 234B, fitted with a conventional tricycle undercarriage retracting into the fuselage. Kosin and his team enlarged the fuselage slightly to accommodate a conventional tricycle landing gear and added a semi-recessed bomb bay under the fuselage. To allow the pilot to act as a bombardier, Kosin mounted a Lotfe 7K bombsight in the fuselage floor ahead of the control column, which the pilot swung out of his way to use the sight. A Patin PDS autopilot guided the aircraft during the bombing run. The pilot-bombardier used another periscope sight during shallow-angle, glide bombing. The first prototype for the revised design, designated Ar 234 V9, flew on March 12, 1944.
The Ar 234 B had two fuel tanks mounted in the fuselage. The forward tank held 1800 lt / 396 Imp.Gal and the rear tank held 2000 lt / 440 Imp.Gal.
Refuelling Ar 234B at Rheine autumn 1944.
Four further trolley mounted aircraft flew during December 1943 and the early months of 1944: the 5th and 7th prototypes, similar to the earlier machines; the 6th prototype, with four 1,760 lb thrust BMW 003 turbojets in separate pods under the wing; and the 8th prototype with four BMW 003s paired in wing pods. To enable the aircraft to take off fully loaded from short runways when there was little or no wind, the third prototype and subsequent twin-engined aircraft had provision for the installation of a Walter 109 500 liquid fuelled rocket booster pod under each outer wing section. Weighing 616 lb apiece, the booster pods developed 1,100 lb of thrust and carried sufficient hydrogen peroxide and sodium permanganate for about 30sec running. A system of inter-connected electrical pressure switches ensured that if one pod failed to deliver thrust, that on the fuselage or on racks mounted beneath the engine nacelles.
Ar234C
The Ar 234B 1 was an unarmed reconnaiss¬ance aircraft which first served with 1 Versuchsverband OberbefehIshaber der Luftwaffe late in 1944, and soon after with Sonderkorrimando Hecht and Sperling. These units were re¬placed in 1945 by 1 (F) 33, 1 (F) 100 and 1 (F) 123, and many reconnaissance sorties were flown over the UK. The bomber version, designated Ar 234 B-0, became the first subtype built in quantity. The Air Ministry ordered 200 Ar 234 Bs and Arado built them at a new Luftwaffe airfield factory at Alt Lönnewitz in Saxony. The factory finished and delivered all 200 airplanes by the end of December 1944 but managed to roll out another 20 by war’s end. The initial order had called for two versions of the Ar 234 B: the B-1 reconnaissance aircraft and the B-2 bomber but Arado built only the B-2 version. The company converted B-2 airframes into reconnaissance aircraft. The bomber version was the Ar 234B 2, which could carry a bombload of 2000 kg (4,409 lb), and other variants included the Ar 234B 2/b reconnaiss¬ance aircraft the Ar 234B 2/1 path¬finder and Ar 234B 2/r long range bomber. Ar 234B 2 bombers joined KG 76 in January 1945 and carried out a number of raids before the end of the war. The Ar 234B’s undercarriage was of retractable tricycle type. The nose¬wheel retracted into a compartment aft of the cockpit, and was fitted with a spring and cam centralising and anti shimmy device. The main wheels retracted forward and inwards into the fuselage, and were of unusually narrow track.
The bomber version had an effective operating radius of action, carrying a 1,100 lb bomb one way and allowing reasonable fuel reserves, of about 300 miles at high altitude, or about 120 miles if the aircraft remained at low altitude. In the reconnaissance role at high altitude with two 66gal drop tanks, the aircraft had a radius of action of about 450 miles. Three modes of bombing attack were possible with the Ar 234B. The shallow dive attack, the horizontal attack from low altitude and the horizontal attack from high altitude. The shallow dive attack was the most used method, and typically involved a nose down throttled back descent from about 16,250ft to 4,500ft, during which the pilot sighted his bombs using the periscopic sight protruding from the top of his cabin.
The low altitude horizontal attack was employed only when poor visibility or low cloud at the target precluded any other method. The pilot simply ran low over his target and released the bombs by eye.
The high altitude horizontal attack used normal map ¬reading or radio navigational methods to an initial point about 18 miles from the target. He then engaged the Patin three axis autopilot and swung his control column out of the way to his right. This done, he loosened his shoulder straps and leaned forward to the bomb aiming position, over the eyepiece of the Lotfe bombsight. The bombsight’s controls were connected to the aircraft’s automatic pilot via a simple form of computer. The pilot adjusted the bombsight controls to hold the graticule over the target; the bombsight then fed the appropriate signals via the computer to the autopilot and thus “flew” the aircraft through its bombing run. When the aircraft reached the bomb release position, the system released the bombs automatically. The pilot then straightened up in his seat, tightened his shoulder straps, retrieved the control column, switched oft the autopilot and turned the aircraft around for home.
An innovation introduced with the Ar 234B was the use of a tail brake parachute to shorten the landing run. It was the first combat aircraft to have this fitted as standard.
Plans called for more advanced versions of the Arado jet, including the Ar 234 C powered by four 1,760 lb thrust BMW 003 A-1 engines and fitted with a pressurized cockpit. Subvariants of the “C” model included the C-3 multi-role aircraft and the C-3N two-seat nightfighter. However, only 14 Ar 234 Cs left the Arado factory before Soviet forces overran the area. The four-engine Ar 234 was, however, the fastest jet aircraft of World War II. With the extra engine thrust this version could take off fully laden from shorter airfields without the use of booster rockets. Peter Kappus, a test pilot with BMW who flew the Ar 234C, later recalled: “The four engined Ar 234C had a very high performance in the take off and the climb. But it could not be flown at full power horizontally, because at the very high speeds reached it structural flutter problems.”
Prototypes for the more advanced Ar 234 D reconnaissance aircraft and bomber with provision for a second crewman were under construction but not completed at war’s end.
Early in 1945 a few Ar 234Bs were modified for use as night-fighters with Kornmando Bonow. These aircraft carried the FuG 218 Neptun radar, with nose-mounted aerials. The radar operator sat in an improvised position inside the rear fuselage, aft of the wing. For this role the Ar 234B was armed with two 20mm MG 151 cannon in a pack mounted under the fuselage. One idea tried out as a means of increasing the radius of action of the Ar 234 bomber was to tow a V1 flying bomb, with the warhead, engine and tailplane removed and a wheeled undercarriage fitted, to carry extra fuel. The idea was not a success and the scheme was never tried in action. During March 1945 Soviet troops advanced into eastern Germany, and the Arado plant at Alt Loennewitz came under threat. To prevent it failing into enemy hands, German Army engineers destroyed the factory with explosives. This brought production to a precipitate halt, after just 210 Ar 234Bs and 14 Ar 234Cs had been delivered to the Luftwaffe. The Arados reached their high point with their prolonged attacks on the big Remagen bridge across the Rhine, and their 1 000 kg (2,205 1b) bombs dropped from low level in shallow dive attacks finally brought the bridge down after 10 days on 17 March 1945. But by then the Allied armies were well into Germany. About 60 of the 210 Arados delivered were captured in flying condition, and most Allied countries had a whole squadron of them in mid 1945. Apart from the critical nature of some take offs, the Ar 234 was found to be a fine aircraft, with no severe Mach trouble up to 0.8 and a range in clean condition of well over 1610 km (1,000 miles).
Characteristics The take off run was long, but single engine safety speed was 140 mph (225km/h) when the aircraft would swing and bank, although not violently, and provided corrective action was taken within 2sec it could be held straight without loss of height. Flaps were raised after reaching 155 m.p.h. (250km/h) and then speed for the initial climb built up to 250 m.p.h. (400km/h). This was reduced to 235 m.p.h. (380km/h) after passing through 26,250ft (8,000m) altitude to give optimum rate of climb. The maximum initial climb rate was 2,500ft/min (12.7m/sec) but had reduced to 1,800ft/min (9.14m/sec) by 10,000ft (3,000m) and to 1,000ft/min (5.08m/sec) by 20,000ft (6,000m). These figures were certainly good for a 1945 vintage reconnaissance bomber but the top speed of 475 mph (765km/h) was what made Blitz so appropriate a name for the Ar 234B. The Blitz handled beautifully at high altitude, its stability about all axes being positive and the harmony of control being good. These characteristics, allied to the superlative view that it offered its pilot, made the Ar 234B a first class platform for photography or bombing. Quality control was suffering adversely in the chaotic conditions prevailing in the German aircraft industry as a result of the heavy Allied bombing attacks. On the Blitz the extremely sharp nosed Frise ailerons were very sensitive to rigging errors and could misbehave violently at speeds above 370 m.p.h. (600km/h), a common fault being rapid oscillation of the ailerons The Blitz suffered from directional snaking, and as often as not this undesirable characteristic was aggravated by poor manufacturing standards on the rudder which sometimes came out fatter or thinner than the fin profile. The Arado company failed to tackle this problem, merely rectifying the fault by off-setting the rudder hinge to one side, or by rigging the balance and trim tabs out in opposite directions. German test pilots did not investigate the high Mach characteristics of the Ar 234B, although normal production testing involved a dive from 10,000ft (3,000m) up to a true speed of 530 m.p.h. (850km/h) low altitude work that did not involve compressibility effects. The transonic region was, therefore, virtually fresh ground for the Royal Aircraft Establishment. In a series of dives from an altitude of 30,000ft (9,100m). The Blitz accelerated less than expected from maximum cruising speed and so a dive of some 30 degrees was needed to achieve the desired entry into the compressibility region before too much altitude was lost. This also entailed using nose down trim, as otherwise the push force to hold the dive angle became too high. At M0.76 nose heaviness set in and the elevator began to feel sloppy. These effects were accentuated until at M0.82 full backward pull on the stick was required to hold the dive angle constant and to allow the loss of altitude to have its density effect on reducing true airspeed until recovery could be effected. For its role as a reconnaissance bomber, therefore, the Ar 234B had a tactical Mach number of 0.75 while its top speed at around 30,000ft (9,145m) was about M0.72. The low speed end of the performance envelope displayed extremely docile characteristics at the stall, this being a straightforward and gentle nose drop. Stalling speed in landing condition was 112 m.p.h. (180km/h). Landing was very easy since the view from the cockpit was superb. The maximum speed for lowering the undercarriage was 250 m.p.h. (400km/h) and then flaps to 25O at 200 m.p.h. (320km/h). It was best to apply full 45O flap after turning on to the final approach at about 175 m.p.h. (280km/h), reducing speed to 130 mph (210km/h), and, when sure of making the airfield, easing back the throttles to idling at 4,000 rpm., crossing the boundary at 125 mph (200km/h). The landing run was lengthy as the rather ineffective brakes faded badly, having to be held on continuously throughout the ground run. All versions of the Blitz had a braking ‘chute fitted which halved the landing run.
Operations The 5th and 7th prototype Ar 234s each carried a pair of Rb 50/30 aerial cameras mounted nearly vertically in the rear fuselage. Fitted with 50cm long focus lenses, the cameras were splayed outwards away from each other at 120 to the vertical, perpendicular to the line of flight. From 32,500ft this split pair camera arrangement took in a swathe of ground just over 6 miles wide along the aircraft’s track. The 5th and 7th prototypes were delivered to the Versuchsverband der Oberkommando der Luftwaffe (Luftwaffe High Command Trials Detachment) based at Oranienburg, a special reconnaissance unit under the direct control of the Luftwaffe High Command. Oberieutnant Horst Goetz took command of the Arado 234 detachment, and he and another pilot, Leutnant Erich Sommer, began learning to fly the new aircraft. In mid July 1944 Goetz received orders to move the Ar 234 detachment to Juvincourt, near Reims in France, to begin reconnaissance operations over the Western Front. From the start there were problems. On July 17 the two Arados took off from Oranienburg, but soon after getting airborne Goetz suffered an engine failure and had to turn back. Sommer continued on to Juvincourt, and landed without incident. After landing, his aircraft was hoisted on to a low loading trailer and towed into a hangar. Then the world’s most advanced reconnaissance aircraft had to remain, unusable, until its tailor¬-made take off trolley arrived from Oranienburg by rail (since there were minor differences between the two hand built prototypes, their take off trolleys were not interchangeable). By that time the Allied bombing campaign had reduced the French rail system to a state of near chaos. Despite the high priority accorded the move, more than two weeks elapsed before the trucks carrying the take¬off trollev reached Juvincourt. At last, on the morning of August 2, everything was ready for Sommer to set out on the world’s first jet reconnaissance mission. It took Sommer about 20min to climb to 34,000ft, by which time the Arado was almost over the battle area. High over the Cherbourg Peninsula he turned the aircraft on to an easterly heading, eased down the nose and descended to build up his speed to about 462 mph. He levelled off and concen¬trated on flying exactly straight and level for his first photographic run. The doors protecting the camera lenses were open, and Sommer flicked the switch to activate the two cameras. The automatic mechanism on each camera took one picture every 11 sec. If any Allied fighter attempted to catch the high flying Arado, Sommer never noticed it. That first photographic run, taking in the coastal strip, lasted about 10 min. Then Sommer turned through a semi circle and levelled out, heading due west for a second run parallel to the first and about 6 miles inland. The second run completed, he turned on to an easterly heading and flew a third run 6 miles further inland and parallel to the previous two. Near the end of the third run the counters on the camera panel clicked to zero. In a flight lasting less than 90min he had photographed almost the entire Allied lodgement area in Normandy. The 380 photographs he had taken caused a considerable stir. During the three weeks that followed the two aircraft flew 13 further missions. On August 28 American tanks neared Reims, and Goetz received orders to move the two Ar 234s from Juvincourt to Chibvres in Belgium. As Goetz prepared to land at Chievres, the ground defences, long conditioned to treat any approaching aircraft as hostile, opened fire at him. An accurate shell struck the Ar 234 just beneath the cockpit, knocking out the aircraft’s electrical and hydraulic systems. Goetz broke off his approach and found that his flaps and landing skids would not extend. The aircraft was still flyable, however, so he flew it back to Oranienburg, where there were proper repair facilities. There Goetz made a skilful flapless belly landing, touching down at about 190 m.p.h. The valuable aircraft came to a halt having suffered remarkably little damage, and Goetz climbed out of the cockpit. Then the Arado received its coup de grace. A young fighter pilot taking off from the airfield, not expecting such an obstacle to be in his path, ran straight into the rear of the Arado and the propeller of his aircraft severed the complete tail unit. Goetz emerged with cuts from stones and flying glass, and was unable to see clearly for a couple of weeks. The Ar 234 was wrecked. Sommer landed his Ar 234 at Chievres without difficulty, then as Allied tanks approached the area he had to move to Volkel in Holland a few days later. Sommer was there on September 3, when over 100 RAF Lancasters carried out a heavy daylight attack on the airfield. Although the landing ground and camp areas were pockmarked with craters, Sommer’s Ar 234 sat undamaged in its hangar The airfield was judged unusable for normal operations, so on the following day, September 4, Sommer made a trolley take off from one of the taxy tracks after some of the craters had been filled in. He landed the Ar 234 at Rheine, near Osnabruck, the new base for jet reconnaissance operations. The withdrawal of the unit to Germany coincided with an end to missions using the take off trolley, for in September the Ar 234B with a normal undercarriage became available. The slightly wider fuselage necessary to accommodate the undercarriage reduced the maximum speed by about 20 mph, but still the aircraft was fast enough to avoid fighter interception. There was also a reduction in the radius of action, but there was provision to carry a 66gal drop tank under each engine for the longer missions. In return for these limitations the Ar 234B was a considerably more versatile machine able to operate from airfields without specialist ground equipment. At Rheine, Goetz’s unit, now designated Kommando Sperfing (Sparrow), gradually built up to nine Ar 234Bs and flew almost daily reconnaissance missions. Standing patrols over the airfield by Allied fighters posed a continual problem, however. The only time an airborne Ar 234 was vulnerable to fighter attack was when it was flying slowly immediately after take off, or before landing. On January 10, 1945, the Luftwaffe Quartermaster General’s list recorded only five reconnaissance Ar 234Bs in service, four with Kornmando Sperling and one with Kornmando Hecht. From September 1944 until the end of the war the reconnaissance Ar 234Bs operated regularly, photographing Allied positions with minimal interference. Early in 1945 Goetz’s Kornmando Sperling had been expanded into a Staffel, and it was redesignated as 1st Staffel of Fernaufklarungsgruppe (FAGr long range reconnaissance group) 123. Two other reconnaissance Staffeln also re equipped with the Ar 23413, one being attached to FAGr 100 and one to FAGr 33. In addition, Erich Sommer had formed his own unit, Kornmando Sommer, equipped with three Ar 234Bs and operating on the Italian front. Not until February 11, 1945, after more than six months, was a reconnaissance Ar 234 lost to an Allied fighter. On that day Scin Ldr David Fairbanks was leading an armed reconnaissance by eight Hawker Tempests of 274 Sqn RAF when he spotted a lone jet aircraft which he took to be an Me 262. After a lengthy chase he caught up with the machine as it slowed to land at Rheine, and shot it down. It was an Ar 234B of Goet’s unit, piloted by Hptm Hans Felden, returning from a photographic mission over Hull. Felden was killed. Kornmando Sommer, based at Udine in Italy, suffered its only pilot loss on April 11. Leutnant Gunther Gniesmer was near Bologna when he had the bad luck to run into a formation of bombers escorted by P 51s of the 52nd FG. Lieutenants Hall and Cooper succeeded in reaching firing positions, and shot him down. Gniesmer baled out, but as he fell clear he struck the tailplane and died in hospital a few days later. The Ar 234 was consistently successful in penetrating deep into enemy territory and bringing back vital pictures. These flights often went undetected by the enemy, and if they were detected the Arados were difficult to shoot down. During the early morning darkness of January 1, 1945, Lukesch led four Ar 234Bs for the world’s first night jet bombing mission. The aircraft took off from Munster Handorf and flew a circular route which took them over Brussels and Liege, dropping bombs on each. The bombing was intended to deceive the enemy rather than cause damage, however. The aim of the mission was to report on the weather over Belgium and Holland in preparation for Operation Boden¬platte (Baseplate), the massed Luftwaffe attack on Allied airfields scheduled to open soon after dawn. By the end of 1944 the Luftwaffe had accepted 148 Ar 234Bs. Yet on January 10, 1945, the Quartermaster General’s list recorded only 12 Ar 234B bombers in front line service, of which 11 were serviceable. All served with 9th Staffel of KG76. By then the remainder of the Geschwader was in the process of re equipping with the type, but about half of the Ar 234s built were sitting in aircraft parks. The crescendo of Allied air attacks on the German transport system greatly hindered the formation of operational units equipped with the Ar 234B, as with other new types. On April 10, 1945, the last date for which figures exist, the Quartermaster General’s report listed a mere dozen Ar 234Bs in service with operational bomber units, of which four were serviceable. The largest attack by Arados on a single day, on February 27, 1945, involved only 37 Arado sorties. The total bomb load carried, 18.25 tons, caused only minor inconvenience to the Allied troops dispersed over a large area.
On 10 April 1945, an Arado 234B-1 reconnaissance aircraft took off from Sula Airfield in Stavanger, Norway. The plane took photographs of Scotland and landed back at Sala 2 hr 30 min later. The Luftwaffe had just ended its last mission over Britain.
The National Air and Space Museum’s Blitz, an Arado Ar 234 B-2 bomber carrying Werk Nummer (manufacturer’s serial number) 140312, was one of nine Ar 234s surrendered to British forces at Sola airfield near Stavanger, Norway. It is the sole surviving example of an Ar 234. The aircraft had been on strength with 9./KG 76 (Ninth Squadron/ bomber Wing 76) during the final weeks of the war, having served earlier with the unit’s eighth squadron. It and three other Ar 234s were collected by the famous “Watson’s Whizzers” group of the USAAF (United States Army Air Forces) for shipment to the United States. After flying from Sola to Cherbourg, France on June 24, 1945, the four Ar 234s joined thirty-four other advanced German aircraft aboard the British aircraft carrier HMS Reaper for shipment to the United States. The Reaper departed from Cherbourg on July 20, arriving at Newark, New Jersey eight days later. U. S. Army Air Forces personnel reassembled and flew two Ar 234s, including 140312, to Freeman Field, Indiana, for testing and evaluation. The USAAF assigned the foreign equipment number FE-1010 to this Ar 234 for inventory and tracking purpose. The only surviving example was in 2004 on display at the Steven F Udvar Hazy Center at Dulles Airport in Washington DC.
Arado Ar 234 B Blitz Engine : 2 x Jumo 004 B, 8731 N Length: 41.535 ft / 12.66 m Height: 13.78 ft / 4.2 m Wingspan : 47.375 ft / 14.44 m Wing area : 298.163 sqft / 27.7 sq.m Max take off weight : 21609.0 lb / 9800.0 kg Weight empty : 11466.0 lb / 5200.0 kg Max. speed : 410 kts / 760 km/h Landing speed : 79 kts / 146 km/h Cruising speed : 378 kts / 700 km/h Service ceiling : 32808 ft / 10000 m Wing load : 72.57 lb/sq.ft / 354.00 kg/sq.m Range : 864 nm / 1600 km Crew : 1 Armament : 2x MG 151 20mm, 1000kg
Ar 234B 1 Type: unarmed reconnaiss¬ance aircraft.
Ar.234B-2 Engines: 2 x Junkers Jumo 004B turbojets, 890kg / 1,980 lbs Wingspan: 14.10 m / 46 ft 3 in Length: 12.64 m / 41 ft 6 in Height: 4.30 m / 14 ft 1 in Wing area: 26.40 sq.m / 284.17 sq ft Max take-off weight: 9850 kg / 21716 lb Empty weight: 5200 kg / 11464 lb Max. speed: 740 km/h / 460 mph / 401kt Ceiling: 10000 m / 32800 ft Range: 1630 km / 1013 miles Armament: 2 x 20mm rear-firing cannons (periscope operated) Bombload: 2000kg / 4,410 lb Crew: 1
Ar234B 2 Blitz Engines: 2 x 1,980 lb thrust Junkers Jumo 004B jet engines, plus two 1,100 lb thrust Waiter 109 500 liquid fuelled rocket booster pods. Wing span: 47ft 3.25in. Length: 41ft 5.5in. Height (on ground over fin): 14ft 1.25in. Wheel track: 6ft 8.75in. Gross wing area: 290.6sq.ft. Normal take off wt: 18,522 lb. Max permissible take off weight without rocket assistance: 19,514 lb. Maximum permissible take off weight with rocket assistance: 22,050 lb. Normally loaded wt, with two booster rockets and a 500kg bomb: 20,870 lb. Maximum speed (clean): 461 mph. at 19,500ft. Max speed with 500kg bomb: 430 mph at 19,500ft. Range at 19,500ft carrying 500kg bomb, no res: 970 miles. Climb to 19,500ft carrying 500kg bomb: 12min 48sec.
Ar 234B 2 Type: single seat tactical light bomber. Engines: two 800 kg (1,764 1b) thrust BMW 003A 1 turbojets. Wing span: 14.44 m (46 ft 3.5 in) Length: 12.64 m (41 ft 5.5 in) Height: 4.29 m (14 ft 1.5 in) Wing area: 27.3 sq.m (284.17 sq.ft). Empty weight: 5200kg (11,4641b) Max take off weight: 9800 kg (21,605 lb). Fuel cap: 3750 lt (825 Imp gal) diesel. Max speed: 742 km/h (461 mph) at 6000 m (19,685 ft) Climb to 6000 m (19,685 ft): 12.8 min. Service ceiling: 10000 m (32,810 ft). Range: 1630 km (1,013 miles). Armament: bombload of up to 2000 kg (4,409 lb); some aircraft carried two rear firing MG 151 20 mm guns.
The Arado Ar 232 was built around a monocoque fuselage, designed for cargo-carrying capacity.
Known unofficially as the “millipede” (or “Tausendfussler”) thanks to the many sets of wheels utilized in the undercarriage arrangement, the Ar 232 system saw only a limited production run with no more than 22 total examples made. To that end, the Ar 232 served in an equally-limiting capacity for Luftwaffe special operations missions and one other transportation air group.
Powered was four Bramo piston engines, two mounted on each wing, each generating 1,200 horsepower. The wings were of a high monoplane with a twin-fin tail assembly. Armament was defensive and included a nose-mounted 13mm machine gun, a 20mm cannon in a dorsal turret mounting and one or two 13mm machine guns mounted at rear.
The landing gear featured a retractable main nosewheel type gear and a secondary gear of ten pairs of smaller wheels on shorter legs situated under the fuselage. The smaller wheels were normally off the ground but took the weight of the aircraft during loading and unloading when the main undercarriage legs were reduced in length to facilitate cargo handling.
The first prototype Ar.232 flew in 1941 powered by two 1,192kW BMW 801MA radial engines.
The Ar 232 series included “A” and “B models. The difference was in the choice and number of powerplants. Aircraft were built as Ar.232As or B-0s and Ar.232Bs, most of which were powered by four 894kW BMW Bramo 323R-2 radials and carried a crew of four and about 4,500kg of cargo (including vehicles).
Ar.232s, including the prototypes, served with the Luftwaffe from 1942 until 1944.
Engines: 4 x BMW 801MA radial, 1193kW Take-off weight: 21135 kg / 46595 lb Empty weight: 12802 kg / 28224 lb Wingspan: 33.50 m / 109 ft 11 in Length: 23.52 m / 77 ft 2 in Height: 5.69 m / 18 ft 8 in Wing area: 142.60 sq.m / 1534.93 sq ft Ceiling: 8000 m / 26250 ft Range: 1060 km / 659 miles
Engine: 4 x BMW Bramo 323 R-2 Fafnir, 986 hp Wingspan: 109.908 ft / 33.5 m Length: 77.1 ft / 23.5 m Height: 18.701 ft / 5.7 m Max take off weight: 46657.8 lb / 21160.0 kg Weight empty: 22667.4 lb / 10280.0 kg Max. speed: 183 kt / 338 km/h Service ceiling: 26247 ft / 8000 m Range: 702 nm / 1300 km Armament: 3x MG 131 13mm, 1x MG 151 20mm
Arado Ar 232 Tausendfussler (Millipede) Engines: 4 x Bramo 232-R Fafnir radial, 1,200hp each. Length: 77.17ft (23.52m) Wingspan: 109.91ft (33.50m) Height: 18.70ft (5.70m) Maximum Take-Off Weight: 46,650lbs (21,160kg) Maximum Speed: 211mph (340kmh; 184kts) Maximum Range: 830miles (1,335km) Service Ceiling: 22,638ft (6,900m) Armament: 1 x 20mm cannon (in dorsal turret) 1 x 13mm machine gun (nose-mounted) 1 or 2 x 13mm machine gun(s) (rear position mount) Crew: 4
A development of the Ar.95, the Ar 196 was designed to replace the Heinkel He 60 floatplane aboard the warships as a shipboard catapult-launched reconnaissance floatplane (with a secondary role as a coastal patrol platform). Arado submitted their design consisting of a two-seat monoplane with all-metal skin and after an evaluation period, the Arado design was selected with development beginning in 1937.
The first prototype flew in 1938. The development, which produced four prototypes, tested two arrangements of floats. One prototype was fitted with a centerline float and two outboard floats whilst the remaining three utilized the more traditional twin pontoon floats each situated under their respective wing.
Following a number of pre-production aircraft, production proper began with twenty Ar.196A-1, which were delivered from mid-1939. Production continued with A-2 to A-5 versions and a few modified single-float Ar.196B.
The Ar 196 was constructed as two production series separated by classification role. The “shipboard” Ar 196 series was designed for catapulting from German warships. This series was comprised of the A-1 and A-4 models. The “coastal” Ar 196 variant operations involved taking off and returning to their respective port areas. This production series comprised of the A-2 and A-3 models. An A-5 model was later offered that featured improved radio equipment and twin 7.92mm machine guns for the radio operator in the rear cockpit. Basic armament consisted of varying quantities of 20mm cannons and 7.92mm machine guns. The Ar 196 could field two 110lb bombs in the strike role.
Ar.196 seaplanes were operational with the German Navy in reconnaissance, patrol and anti-submarine roles throughout World War II and were for many years the standard catapult sea-plane of the Navy, up to four being carried on board some battleships. The aircraft was eventually deployed on German warships that included the Deutschland, the Admiral Scheer, the Admiral Hipper and the Leipzig. This floatplane was in use with Bulgaria and Romania.
Ar 196A fication Engine: 1 x BMW 132K, 705kW Take-off weight: 3600 kg / 7937 lb Empty weight: 1265 kg / 2789 lb Wingspan: 12.4 m / 40 ft 8 in Length: 11.0 m / 36 ft 1 in Height: 4.5 m / 14 ft 9 in Wing area: 28.3 sq.m / 304.62 sq ft Max. speed: 315 km/h / 196 mph Cruise speed: 268 km/h / 167 mph Ceiling: 6600 m / 21650 ft Range w/max.fuel: 1080 km / 671 miles Range w/max.payload: 820 km / 510 miles Crew: 2 Armament: 2-3 machine-guns, cannon, 100kg of bombs
A 1936 tandem two-seat monoplane trainer with retractable landing gear. Powered by one 335kW Argus As.410A engine on Ar.96B production aircraft built from 1940 (prototype had one 179kW Argus As.10C). The Ar.199 was a development of the design.
During the war years, production was transferred to Letov and Avia in Czechoslovakia where manufacturing continued until the end of 1948 as C.2B-1. Letov built the Arado Ar-96B trainer as the C-2A (back designation for wartime production Ar-96 for Luftwaffe), and C-2B (Arado Ar-96B produced for Czech Air Force).
Avia C.2-1
The C.2B-1 was a standard basic trainer in the Czechoslovak Air Force and National Security Guard.
Engine: 1 x As 410A, 340kW Wingspan: 11.0 m / 36 ft 1 in Length: 9.1 m / 29 ft 10 in Height: 2.6 m / 8 ft 6 in Wing area: 17.1 sq.m / 184.06 sq ft Take-off weight: 1750 kg / 3858 lb Empty weight: 530 kg / 1168 lb Max. speed: 330 km/h / 205 mph Cruise speed: 275 km/h / 171 mph Ceiling: 7000 m / 22950 ft Range w/max.fuel: 990 km / 615 miles Crew: 2 Armament: 1-2 machine-guns
Ar 96B / Avia C.2B-1 Engine: Argus As 410A, 465 hp Wingspan: 35 ft 11.5 in Wing area: 186.22 sq.ft Length: 29 ft 11.25 in Height: 8 ft 6 in Empty weight: 2854 lb Loaded weight: 3747 lb Max speed: 219 mph Cruise: 175 mph Range: 428 mi
Five prototypes of Ar 68 single-seat fighter biplane (the Luftwaffe’s first fighter) appeared in 1933, powered by BMW VI or Junkers Jumo 210 engines. The choice of engine was influenced by the availability. Rethel wanted the Jumo 210 but other manufacturers had claims before Arado so they had to settle on the BMW VI until supplies of the former were more readily available. Designed to replace the Heinkel He 51, it was sent to Spain for operational evaluation. Three aircraft were sent to La Cenia in January 1937 for use in an experimen¬tal night fighter flight. They were used briefly, but apparently ineffectively, against Republican Potez 540 and Bloch 200/210 bombers. All three aircraft were painted over¬all RLM 63 gray. In early 1938, the two surviving Arados (coded 9 1 and 9 2) were transferred to the Nationalists, who used them in the 2nd Army Co¬operation Group.
The first version to enter production and service (1936) was the Ar.68F, powered by the BMW engine, followed after a small production run by the improved 514kW Jumo Da- or Ea-engined Ar.68E. Prototype Ar.65G and H versions were subsequently built, of which only the supercharged 533.4kW BMW 132 Da-engined ‘H’ was fully developed. The Ar68H was flown using the BMW 132Da radial, a license built Pratt and Whitney Hornet, this engine offered a very much improved performance (max speed 400 km/h) but it was all too late. But even this failed to enter production despite having four machine-guns and an enclosed cockpit for the pilot. A few Ar.68 remained operational as night fighters during the first months of World War II and were the Luftwaffe’s last operational biplane fighters.
Engine: 1 X Jumo 210ea, 505kw Take-off weight: 2020 kg / 4453 lb Empty weight: 420 kg / 926 lb Wingspan: 11.0/8.0 m / 36 ft 1 in / 26 ft 3 in Length: 9.5 m / 31 ft 2 in Height: 3.3 m / 11 ft 10 in Wing area: 27.3 sq.m / 293.85 sq ft Max. speed: 335 km/h / 208 mph Cruise speed: 280 km/h / 174 mph Ceiling: 8100 m / 26600 ft Range w/max.fuel: 500 km / 311 miles Armament: 2 machine-guns, 60kg of bombs Crew: 1
Arado Ar 68G Engine: 1 x BMW VI V-type, 750hp. Wingspan: 36.09ft (11.00m) Length: 31.17ft (9.5m) Height: 10.76ft (3.28m) Maximum Take-Off Weight: 5,456lbs (2,475kg) Maximum Speed: 190mph (305kmh; 165kts) Maximum Range: 258miles (415km) Service Ceiling: 26,575ft (8,100m) Armament: 2 x 7.92mm MG 17 forward-firing fixed machine guns. Crew: 1
Developed from SD.II and SD.III prototypes that Walter Rethel produced at the request of Reichswehrministerium, the Ar 64 was a single-seat biplane fighter intended to succeed Fokker D.XIII. It was a traditional biplane with unequal wings of mixed construction, the aerofoil having a timber structure and the fuselage a metal tubular structure, both fabric covered. The landing gear was fixed, with a split axle.
Versions Arado Ar 64a: First prototype, powered by a Bristol-built Jupiter VI, 530 hp licensed built by Siemens Halske and with a four-bladed wooden propeller.
Arado Ar 64b: The second and third prototypes, tested with Lipetsk in 1931, were powered by a 12 cylinders BMW VI 6,3 of 640 hp and were used for the development of the Ar 65.
Arado Ar 64c: The last prototype appeared in 1931, and was distinguished from the first by a reinforced structure and a four-bladed propeller of large diameter.
Arado Ar 64D: A production version powered by a Jupiter VI, identifiable with a modified landing gear and a two-bladed propeller. The armament was proposed to be 2 7,9 mm machine-guns but it is very probable that they were not fitted on the 19 aircraft of the DVS during 1934/1935. These aircraft were used as advanced trainer by civil and military pilots.
Arado Ar 64E: The last version, powered by a Jupiter VI. Used by Jagdstaffeln of Fliegergruppe Döberitz and Damm, along with Ar 65.
Users: Germany: 30 Ar 64 were ordered by Luftwaffe clandestine between 1931 and 1934, including 12 to produce by Focke-Wulf. 6 Ar 64D and 5 Ar 64E were in account at April 1, 1933. The last specimens were delivered during 1934 and, in spite of the arrival of Ar 65, intended to succeed to him, 21 Ar 64 remained in service on July 1, 1936.
Soviet Union: The first Ar 64 had been used briefly for tests powered by a Rolls-Royce engine before ordering 24 to be delivered at the beginning of 1933, but by April 1936 they had received only 19 planes.