de Havilland DH 103 Hornet

Sea Hornet F.Mk.20

The de Havil¬land Hornet was a private-venture new design as a response to the need for a long-range single-seat escort fighter for service in the Pacific to Specification F.12/43. Development began in 1942, the prototype making its maiden flight on 28 July 1944, but the Hornet suffered heavily through post VJ-Day cancellations.
It entered production at the end of 1944 and deliveries were made to the RAF from February 1945. Four versions were produced for the RAF as: the Hornet F.1 medium-range single-seat fighter with four 20mm cannon and provision for carrying two 450kg bombs or two 455 litre drop tanks; Hornet PR.2 long-range unarmed photographic reconnaissance aircraft; Hornet F.3 long-range single-seat fighter with the increased fuel tankage of the PR.2; and Hornet FR.4 with a vertically mounted camera. More than 200 were built.
The Hornet entered service as a front line fighter in August 1946 until April 1951. The Hornet was the fastest twin piston-engined operational combat aircraft in the world while in service. Operated in Malaya in the early 1950s, the type was finally withdrawn from service in 1955.

DH 103 Sea Hornet

Hornets equipped four UK Air Defence Squadrons, 19, 41, 64 and 65. Flying training was carried out by 226 Operational Conversion Unit (OCU) and by the Hornet Conversion Flight, the latter being based at Linton on Ouse.

Consideration of the possibility of acquiring a carrier-based variant resulted in the testing of three Hornet FMk 1 aircraft in 1944-5, the third of these being fully navalized. It was fitted with folding wings and had provision for deck arrester and RATO gear. Air-draulic shock-absorber legs replaced the rubber-in-compression legs to eliminate bounce in carrier landings. Such was the success of these trials that a production order for 79 Sea Hornet F.Mk 20 fighters soon followed, deliveries getting under way to No. 801 Squadron in June 1947 and joined HMS Implacable in 1949. A carrier-based medium-range single-seat fighter/reconnaissance/strike aircraft, capable of carrying eight 27kg rockets, bombs, mines and drop-tanks. Armament was basically similar to that of the RAF Hornet, and this model remained in service until 1951 in a front-line capacity. The next version was the Sea Hornet NF.Mk 21 night-fighter, whose development began in 1946 although it was not until January 1949 that this attained operational status with the Fleet Air Arm fitted with an A.I. radar scanner in a thimble radome in the nose, equipping No. 809 Squadron at Culdrose until 1954, when it finally gave way to jet-powered equipment in the shape of the de Havilland Sea Venom. Subsequently, the Sea Hornet NF. Mk 21 was reassigned to the training of night-fighter radar operators, a task it performed until 1956 when the handful of remaining aircraft were scrapped. Production of the Sea Hornet was completed with the Sea Hornet PR.Mk 22 for photographic reconnaissance, about two dozen examples being completed, all of which employed a pair of F52 cameras for use by day and a single K19B camera for night work. In order to undertake the reconnaissance mission, the cannon armament was deleted, its place being filled by cameras.

In all, a total of 391 aircraft were produced of which 180 were for the Royal Navy and the production run comprised: two prototypes, sixty F.Mk 1, five PRMk 2, 132 Mk 3, twelve FMk 4, 79 FMk 20 (RN), 78 NMk 21 (RN) and 23 PRMk 22 (RN).

DH Hornet 64 Sqn RAF

Gallery

Hornet F. Mk 3
Engines: 2 x Rolls-Royce Merlin 130/131, 1544kW
Take-off weight: 9480 kg / 20900 lb
Empty weight: 5840 kg / 12875 lb
Wingspan: 13.72 m / 45 ft 0 in
Length: 11.18 m / 36 ft 8 in
Height: 4.32 m / 14 ft 2 in
Wing area: 33.54 sq.m / 361.02 sq ft
Max. speed: 760 km/h / 472 mph
Ceiling: 10670 m / 35000 ft
Range: 4820 km / 2995 miles
Armament: 4 x 20mm cannons, 900kg of weapons
Crew: 1

DH 103 Sea Hornet
Engines: 2 x RR Merlin 133/134, 2030 hp
Wingspan: 45 ft / 13.71 m
Length: 37 ft / 11.28 m
Max speed: 462 mph / 744 kph
Crew: 1-2
Armament: 2 x 20 mm cannon

Sea Hornet F.Mk 20
Engines: two 2,030-hp (15 14-kW) Rolls-Royce Merlin 133/134 inline piston.
Maximum speed 748 km/h (465 mph) at 6705 m (22,000 ft)
Service ceiling 10,670 m (35,000 ft)
Range 2414 km (1,500 miles) with auxiliary fuel.
Empty weight 6033 kg (13,300 lb)
Maximum take-off 8405 kg (18,530 lb)
Wingspan 13.72 m (45 ft 0 in)
Wing area: 361.025 sq.ft / 33.54 sq.m
Length 11.18 m(36 ft 8 in)
Height 4.32 m (14 ft 2 in)
Wing area 33.54 sq.m (361 sq ft).
Armament: four 20-mm cannon, eight 27-kg (60-lb) rockets or two 454-kg (1,000-lb) bombs.

de Havilland DH 98 Mosquito        

By 1937 Geoffrey de Havilland had become convinced that war with Hitler was inevitable. His idea had been a bomber fast enough to out fly enemy fighters, a two man crew, no rear armament, pure speed for defense. Two Rolls Royce Merlins for power, and the sleekest possible shape, entirely fashioned from wood, since in war there was likely to be a surplus of wood and woodworkers, DH thought, and a shortage of aluminum alloy.

When he showed up at the Air Ministry with his drawings of a 400 mph gunless carpentry bomber faster than a Spitfire, they told him: “Forget it. You haven’t built a war machine in years. Start on something simple, nothing this ambitious.” As they drove home, DH and a colleague discussed the Mosquito and what a good idea it had been. As they turned in the factory gate at Hatfield, DH said: “We’ll do it anyway.”

DH set up to de¬sign and build his prototype plywood bomber in an old moated mansion, Salisbury Hall, five miles away. In December 1939, a team under Geoffrey de Havilland, with R E Bishop and C C Walker, started detailed design. The radiators for the Merlins were in a two foot forward extension of the wing root between the engines and the fuselage, with intakes in the leading edge and cooling air exits beneath the wings that actually gave cooling thrust, not drag. From these inboard radiators, and with a minimum of plumbing, they were also able to contrive a cabin heat system that kept Mosquito crews warm at altitude. The fuselage was in cross section of tapered ovals. It was a balsa filling sandwiched be¬tween ply sheets, built in two vertical halves and glued together. The one piece wing and fixed tail surfaces were wooden, but the control surfaces were ply covered wooden flaps, metal covered al¬loy ailerons and elevators, fabric covered rudder. When all the wooden bits had been sanded smooth, screwed, glued and pinned, they were covered with fabric, the fabric stretched with dope and then painted.

The Rolls Royce Merlin engines were descendants of the R type racing engines developed for the Schneider Trophy floatplanes in the early 1930s. They were V 12s, cooled by a mixture of water and glycol, and (in later versions) aspirated by a two stage, two speed supercharger but the engines held power to rare altitudes. Takeoff power was 1,200 to 1,700 horsepower each, depending on the mark of Merlin.
The wing, while more straightforward than the fuselage, requires a great deal of jigging and tooling. Made in one piece 51 feet long, it contains two spars built up of booms of laminated spruce with webs of birch ply.
The rear spar is swept forward to give that distinctive wing shape. The spars are separated by 32 ribs, and then covered by an inner top skin of ply with an outer ply skin separated by spanwise douglas fir stringers. The bottom is single skin with stressed panels covering the fuel tank openings. All the skins are glued and screwed, with over 4000 screws in the top in alone.

The de Havilland team designed, drew up some 10,000 drawings, built a mockup, designed and built all the jigs and tooling, and rolled the aircraft out in 11 months.

On 1 March 1940 a contract was signed for 50 aircraft and the first flew on 25 November 1940, 11 months after design work began.

The prototype was taken to Hatfield Aerodrome and assembled in November 1940. The prototype’s first flight test pilot was DH’s eldest son, also named Geoffrey de Havilland.

de Havilland DH 98 Mosquito Article

Conceived as an unarmed fast light bomber, the Mosquito was also planned as a photo-reconnaissance aircraft and a night fighter. The second aircraft, flown on 15 May 1941, was the night fighter prototype. Also constructed at Salisbury Hall, and young Geoffrey decided he’d fly it out of the pasture beyond the manor’s cabbage patch, to save the time and labour of dismantling, trucking and reassembly at the airfield.
Test flying of the Mosquito revealed airspeed readings so high that DH wasn’t sure he believed his pilots. So he one day “borrowed” (DH’s word) a Spitfire as a pace aircraft. Both pilots agreed the Mosquito was almost 20 knots faster, doing eventually 370 knots at 30,000 feet. DH arranged demonstrations for the Air Ministry at which young Geoffrey would fly such unbomber-like manoeuvres as vertical rolls with one engine feathered.
In Boscombe Down trials the Mosquito proved some 20 mph faster than the then fastest mark of the Spitfire and was almost as manoeuvrable. It reached a maximum speed of 437 mph and a maximum altitude of 44,600 feet in the early 1940s.
The third prototype was a fighter variant.
Production wasn’t helped by the ex¬traordinary number of different models ordered 43 in all and by the Air Ministry oft changing its mind as to which variants were needed most urgently. Since they were possibly the fastest airplanes in the world for two and a half years, Mosquitos flew as fighters, both day and night, heavily armed with cannon and machine guns, as intruders fighter-bombers, pure bombers, marker bombers with the pathfinder squadrons of Bomber Command, photoreconnaissance aircraft, dual control trainers, airliners, and as antisubmarine aircraft, carrying a six pounder antitank gun or, later, rockets.
The first Mossies into service, in the autumn of 1941, were photorecon variants. The first PR aircraft made their initial daylight sorties over Paris on 20 September 1941. PR Mosquitoes also had the distinction of being the last in RAF front-line service, being withdrawn in December 1955. In time, these PRU aircraft roamed all over Germany and Europe. They flew between 22,000 and 30,000 feet, just below contrail height, so that any German fighters above them might be revealed by their own trails. But they’d photograph from as little as 400 feet if that was the cloud base. The Mosquitos’ speed did give them substantial immunity from fighters though not from flak with the same FW 190s that the night-fighter Mosquitos were after being their principal adversary. When attacked by German jets, the Mosquitos could avoid their fire by tight turns; one held off two Me 262s for 15 minutes like this, till the Messerschmitts ran low on fuel. The Mosquitos’ cameras were good enough to reveal the markings on German aircraft on the ground from 24,000 feet. By 1943, they were getting good photographs at night, using American photoflashes of 600,000 candlepower.

Entering service at the end of July 1941, the first 50 Mosquitos were deployed as long-range reconnaissance aircraft (Mk.1), as night fighters (Mk.IIs) or as bombers (Mk.IVs).

No.105 Squadron introduced Mosquitos into service in May 1942 as daylight bombers. Mosquitos were also the first Allied aircraft to bomb Berlin in broad daylight. The British learned that on January 30, 1943, both Goering and Goebbels were to address a rally in the city, and the RAF timed nuisance raids by two trios of Mosquitos to coincide with the start of their speeches. Back in Britain, those in the know tuned their wireless sets to Berlin radio, and to their great joy heard muffled noises and shouts, then an hour of martial music when there should have been live broadcasts of grandiose Nazi pomposity. No great damage was done, and one Mossie was lost; but Nazi pride had been ruffled, and Goering’s boast that no Allied aircraft would ever bomb Berlin had been most obviously disproved.
Unarmed Mosquitos flew in BOAC colours between Scotland and Stockholm. The British needed Swedish ball bearings, and they also transported POW mail and a few VIP passengers in a makeshift bunk inside the bomb bay. Passengers were loaned a flying suit, warm boots, Mae West and parachute for the trip; they had oxygen masks, heat and an intercom to the pilot but no means at all of seeing out.
The Mosquito was an economical weapon. Four or five could be built for the man hours necessary for one heavy bomber; wood and women were resources not in short supply and women did much of the work in building Mosquitos. There were only two crewmen to train, against 10 for a heavy; two engines against four, and half the fuel consumption. By the war’s end, Mosquitos were carrying 4,000 pound bombs to Berlin: about the same load as a B 17, but the Mossies only took half the time and had a third of the loss rate.
A total of 466 Mosquito Night Fighter Mk IIs were produced.

On the night of 18-19 August 1942, the British tried out their new pathfinder tactics for the first time in a riad on the ship docks in Flensburg (western Germany). British Mosquitos equipped with Gee navigational and blind-bombing equipment were supposed to mark the area bombing target with flares, but despite precise theoretical planning, the raids went awry: the Gee devices became non-operational several miles before reaching the city due to German jamming, and the marker flares were dropped in the wrong place.

On Sunday 20 December 1942, six British Mosquitos of 109 Squadron guided by the ‘Oboe’ radar-controlled blind-bombing and navigational aid that was here used for the first time, raided a power plant in Lutterade (eastern Holland). This target-finding radar used two ground transmitters – the ‘cat’ and ‘mouse’ stations – to lead an aircraft to its target by the shortest possible route.

The T.Mk.IIIs were a direct development of the F.Mk II fighter, possessing dual controls and no armament.
The origin of the armed Mosquito T.Mk.IIIs was wartime Australia. The need for training in the ground attack role had led to some British built T.Mk.III trainers being armed with the machine gun packs removed from FB.Mk.40s previously converted to the photo reconnaissance role.

Mosquito B.IV

The prototype of the most widely used of the Mosquito fighters (HJ 662) made its first flight in February 1943, and more than 2,500 of this Mk VI version were built eventually. With two 1,710 hp Rolls Royce Merlin XXX engines, it had a maximum level speed of 407 mph (655 km/h) at 28,000 ft (8,535 m).

The B.IV Srs 2 bomber version first operation was on 20 November 1942.

Little has been said of No.618 Sqn of Coastal Command, formed on 1 April 1943, before the dam buster raids, to operate Mosquito carrying a variant of the Wallis bomb. The primary function was to attack the German fleet in Norway using the weapon code-named Highball.

Smaller than the Lancaster weapons, Highball worked the same. Bouncing across water, rebounding, the spinning under the ship, where a hydrostatic fuse exploded the 600 lb / 272 kg explosive charge. The Mosquito accommodated two of these weapons in tandem in the bomb-bay, with the doors removed.

Highball Mosquito

Work on the Mosquito weapon, including dropping trials, was undertaken by Vickers during April 1943. Most of the test flying was done from Manston by ‘Shorty’ Longbottom, the Vickers test pilot who shared the Lancaster trials with Mutt Summers.

For the first two weeks 619 Sqn used standard Mosquito IVs. The first converted aircraft, DZ531/G, reached their Skitten base, from Vickers, on 18 April 1943. Another five had arrived by the end of the month. The Highball programme eventually had sixty of the 263 B.Mk.IV Series 2 Mosquitos built, but thirty were subsequently re-converted to take a 4000 lb bomb installation.

Highball Mosquito

618 Sqn began dropping trials with Highball on 13 April 1943, three days before the Dam Buster Lancaster. By the end of the month twenty-three drops were completed, using prototype weapons and flying the Mosquitos from Manston. Much of this practice was against the Bonaventura target ship in Loch Cairnbarn.

Mosquito FB.26 KA114

On 4 October 1944 the US 8th Air Force Headquarters announced that for several days the German Luftwaffe had been using allied Mosquito and Mustang aircraft furnished with German national emblems. On 3 October 1944 a Mosquito flown by Germans was shot down near Aachen. Aerial combats had taken place over Holland between allied and German Mustang fighters. These machines in German hands were aircraft which had been forced to land behind German lines.

DH Mosquito Deck Trials

The Royal Navy operated a number of Mosquito FB.Mk VI and T.Mk 3 land-based aircraft in the anti-ship attack and trainer roles, but its most important type was the Sea Mosquito TR.Mk 33 carrierbome torpedo and reconnaissance fighter. This model first flew in November 1945 and entered service in August 1946. The variant was based on the FB.Mk VI with larger propellers, American radar, and naval features such as fold¬ing wings and an arrester hook. With the Second World War over, deliveries of this model totalled just 50, though there were also six examples of the related Sea Mosquito TR.Mk 37.

On New Year’s Eve 1944, the RAF Mosquitos of 627 Squadron carried out another precision raid. This time the target was Gestapo Headquarters in Oslo. Forty-four Mosquitos badly damaged the buildings, destroying many German documents.

On the night of 14-15 June 1944 was the first time a V-1 flying bomb was shot down by an aircraft. An RAF Mosquito of 6-5 (County of Warwick) Squadron, flown by Lt. J.G. Musgrave and Sgt. F.W. Samwell, shot down a ‘doodlebug’ over the Channel.

The availability of two-stage two-speed supercharged versions of the Merlin led to the introduction of numerous new Mosquito bomber and PR versions but, apart from their use in the high-altitude NF Mk XVs, these engines were not introduced in a fighter variant until the spring of 1944, when the Mosquito NF Mk 30 appeared. This night fighter had the same “universal” radome as the NF Mk X1X, together with 1,680 hp Merlin 72 engines (in the first 70 production examples) or 1,710 hp Merlin 76s (in the other 460 built). First Mk 30 flew in March 1944 and operational service began in June 1944 with No 219 Squadron for home defence, other squadrons using this type for long-range escort of Bomber Command formations attacking Germany in 1944/45.

Mosquito night fighters

The PR.34 differences from earlier machines appear in an altered canopy, that has an astrodome in addition to the bulged side windows and vee-windscreen found on the bomber version. The engine cowlings feature an enlarged chin intake and the fuselage belly has a distinct bulge. The aircraft also features the paddle-bladed propellers that give the late series of this type such an air of purpose.

On the night of 2-3 May 1945, the RAF flew its last raid on Germany when 125 Mosquitos of 608 Sqn dropped 174 tonne of bombs on the harbour at Kiel. The crews met no opposition and all aircraft came back.

On 12 March 1945 the last bomber variant of the Mosquito, the B35, made its first test flight. The war had ended before it could be used operationally, but it entered service with the post-war Royal Air Force and served as a bomber until the beginning of 1954.

Some Mosquito B35s were converted for other duties including target-towing and in this role they continued in service until 1963.

The Mosquito NF Mk 36 was similar but had 1,690 hp Merlin 113s; the first example flew in May 1945 and 163 were delivered, up to March 1947. The Force Aérienne Beige acquired sufficient to equip two squadrons after RAF service, these remaining in service until the mid ‘fifties. The final fighter version of the Mosquito was the NF Mk 38, differing from the Mk 36 in having British Al Mk X1 radar in place of American Al Mk X and Merlin 113 / 114 engines, Of 101 built, 54 were supplied to the Yugoslav Air Force in 1950 and the others were scrapped.

The Mosquito T.43 is an Australian built dual control model similar to the T.3 but with Packard Merlin engines and retaining its armament of four .303 machine guns and four 20mm cannon.

Other versions were Sea Mosquito TR.Mk 33 (initial model with American ASH surface search radar), Sea Mosquito TR.Mk 37 (derived model with British ASV surface search radar), and Mosquito TT.Mk 39 (naval target-tug model based on the B.Mk XVI bomber).

Towards the end of the war Mosquito units were averaging one aircraft loss per 2,000 sorties – by far the lowest figure recorded by Bomber Command. Mosquito bombers, which had entered service carrying a 907kg bomb load, were later to carry a 1800kg block-buster in a bulged bomb bay. Mosquito fighters were to distinguish themselves in fighter-bomber, anti-shipping and night-fighter roles, and were to destroy some 600 V-1 flying-bombs in the defence of Britain. For reconnaissance duties the Mosquito was the RAF’s major long-range aircraft in this category, serving in Europe, Burma and the South Pacific. Including 1,342 Mosquitoes built in Australia and Canada, total construction was 7,785 aircraft when production ended in November 1950. 6,710 were built during WW2.

Eighty-nine were ordered by the RNZAF to re-equip 1946-55 but the bulk were never put into service.

Specification F.18/40 was originally written for a fixed gun two-seat night fighter to replace the BP Defiant, dated 10/11/1940, but on 9 December a correction was made in that armament was changed to incorporate a ‘dorsal power-operated turret’.

de Havilland was asked to examine the spec, even though the firm was not invited to tender to it. The result was the two turret fighter Mosquitoes, the fourth prototype W4053 built at Salisbury Hall and flown from there to Hatfield with the turret fitted on 14 September 1941, and W4073, first flight 5 December from Hatfield.

turret equipped Mosquito

The turret was to be a Bristol B.11 four-gun turret, which was designed for the Bristol Beaumont bomber project, and was very light and compact.

DH also did much research into Mosquitos fitted with turrets as a result, to discover that a considerable amount of performance was lost as a result of the installation. The two turret fighter Mosquitos, after having their turrets removed, went on to become the prototype T.III trainers.

turret equipped Mosquito
W4050 July 1941

The prototype W4050 was fitted with a mock up turret for aerodynamics trials in July 1941. In September 1941 the fourth prototype Mosquito, W4053, which was the first prototype turret fighter (the third prototype, W4052 was the first night fighter NF.II, built to F.21/40), flew for the first time, but with a mock up turret only.

By then the decision had been made not to continue with the turret fighter, although a second prototype turret fighter was finished, W4073, in December 1941. This aircraft and W4053 became the prototypes of the T.III trainer variant once the turret fighter was cancelled.

This faint vertical line on the canopy of the prototype shows where the fairing for the turret mock up rubbed against the canopy. Within the structure are four mounting bolts where the turret was fitted.

In 1949 Mosquitos of No.540 PR Squadron carrying a pilot and a navigator normally used the standard F.52 camera with two of these units arranged for split cover and a third rear unit for vertical photography. The F.52 can be fitted with lenses of various focal length, but normally 20in or 36in units; the picture size is 8.5in x 7in. and the magazine holds film for 500 exposures.

For aerial survey work, 6in K.17 cameras were used giving a 9in x 9in picture.

Replica:
Reconstruction Répliques Avions Anciens Mosquito .75

Gallery

Engines: 2 x 1,680 hp Rolls Royce Merlin 72.
Length 41.5 ft. (12.65 m.).
Wing span 54.2 ft. (16.5 m.)
Weight empty 15,510 lb. (7,035 kg.)
Crew: 2.
Max. bomb load: 4,000 lb. (1,800 kg.)
Max speed 408 mph (656 kph)
Ceiling 37,000 ft. (11,000 m) fully loaded
Range 1,370 miles (2,200 km.)
Stall flaps down and light: 90 knots, 119 knots flaps up and at gross weight
Vmc: 185 knots at full power and 175 knots at climb power.

Prototype
Wingspan: 52 ft 6 in

PR.I
Unarmed reconnaissance
Wingspan: 54 ft 2 in

F.II
Night fighter
Engines: 2 x Rolls-Royce Merlin 21, 1230 hp
Seats: 2 side-by-side
Armament: 4 x 20mm Hispano cannon 300 rds / 4 x 0.303 Browning 2000 rds each

T.III
Dual control trainer
First flown January 1942
Last delivery 1949
Engines: 2 x Rolls-Royce Merlin 21, 1230 hp

B.IV
Unarmed bomber
Engines: 2 x Rolls-Royce Merlin 21, 1230 hp
Bombload: 4 x 500 lb / 227 kg
Later bulged bomb-bay: 4000 lb / 1814 kg

Mosquito FB Mk VI
Engine: 2 x Rolls-Royce Merlin 25, 1208kW / 1,635 hp
Props: 12 ft 0 in (3.66 m) dia 3 blade.
Max take-off weight: 10115 kg / 22300 lb
Empty weight: 6486 kg / 14299 lb
Wingspan: 16.51 m / 54 ft 2 in
Length: 12.47 m / 40 ft 11 in
Height: 4.65 m / 15 ft 3 in
Wing area: 42.18 sq.m / 454.02 sq ft
Wing loading: 47.15 lb/sq.ft / 230.0 kg/sq.m
Max. speed: 583 km/h / 362 mph at 13,000 ft (3,960 m)
Cruise speed: 523 km/h / 325 mph
Service Ceiling: 10060 m / 33000 ft
Initial climb rate: 2500.00 ft/min / 12.70 m/s
Range: 2655 km / 1650 miles
Endurance: 7 hr
Armament: 4 x 20mm Hispano cannon, 4 x 7.7mm Browning machine guns
Bomb load: 4 x 250 lb / 113 kg – later 2 x 250 lb / 113 kg & 2 x 500 lb (2,000 lb / 900kg)
Crew: 2
No built: 2584

Mk VI
Engine: 2 x Rolls Royce Merlin XXX, 1,710 hp.
Max level speed of 407 mph (655 km/h) at 28,000 ft (8,535 m).
Wing span: 54 ft 2 in (16.51 m).
Length: 40 ft 6 in (12.34 m).
Height: 15 ft 3 in (3.51 m).
Max TO wt: 22,300 lb (10,115 kg)

B.VII
Canadian-built – used in North America only

PR.VIII
Reconnaissance
Engines: 2 x Rolls-Royce Merlin 61

B.IX
Bomber
Engines: 2 x Rolls-Royce Merlin 72, 1680 hp
Bombload: 4000 lb

PR.IX
Reconnaissance – First flew July 1943
Engines: 2 x Rolls-Royce Merlin 72, 1680 hp

NF.XII
Night fighter F.II with AI Mk.VIII radar
Engines: 2 x Rolls-Royce Merlin 21, 1230 hp
Seats: 2 side-by-side
Armament: 4 x 20mm Hispano cannon 300 rds

NF.XIII
As Mk.XII but new build Aug 1943
Mk.VI wing

NF.XV
High altitude pressurised fighter
Wing span: 59 ft
Radar: AI Mk.VIII

Mk.XVI
pressurised cockpit
Engines: 2 x Rolls-Royce Merlin 72, 1680 hp or Merlin 74 or 77, 1710 hp
Armament: 4 x 0.303 Browning mg
Bombload: 4000 lb

NF.XVII
Radar: AI Mk.X or SCR 720
Armament: 4 x 20mm, 500 rds each

Mk.XVIII
Role: Fighter-bomber
Wingspan: 54 ft 2 in
Length: 40 ft 10.75 in
Max speed: 380 mph at 13,000 ft
Range: 1270 miles
Armament: 1 x 57mm Molins gun, 4 x .303 in Bowning mg
Bombload: 2 x 500 lb bomb

FB.XVIII
Coastal Command fighter
Armament: 1 x 57mm 6-pounder Molins, 24 rds / 4 x .303 Bowning mg
Bombload: 8 x 60 lb rockets or bombs

NF.XIX
Engines: 2 x Rolls-Royce Merlin 25, 1640 hp
Radar: AI Mk.VIII or SCR 720

B.XX
Canadian-built B.IV
USAAF designation F-8

FB.21
Canadian-built
Engines: 2 x Packard V-1640 Merlin

T.29
Canadian-built
Engines: 2 x Packard V-1640 Merlin

Mk.XXX
Engines: 2 x Rolls-Royce Merlin 76, 1710 hp

NF Mk 30
Based on Mk.XIX
Max speed, 338 mph (544 km h) at sea level and 424 mph (682 kmh) at 26,500 ft (8077 m)
Initial climb, 2,250 ft/min (11,4 m/sec)
Range, 1,180 mls (1 900 km)
Empty weight, 15,156 lb (6880 kg)
Loaded weight. 21,600 lb (9806kg)
Span, 54 ft 2 in (16,51 m)
Length, 41 ft 6 in (12,64 m)
Height, 15 ft 3 in (4,65 m)
Wing area, 450 sq ft (41,81 sq.m).

Mk.32
Engines: 2 x Rolls-Royce Merlin 25, 1640 hp

PR.32
Extended-span reconnaissance
Engines: 2 x Rolls-Royce Merlin 113/114, 1690 hp

Sea Mosquito TR.Mk 33
1st RN Sea Mosquito
Folding wings
Engines: two 1,640-hp (1,223-kW) Rolls-Royce Merlin
Prop: 4 blade
Maximum speed 385 mph (620 kph) at 13,500 ft (4,115 m)
Initial climb rate 3,000 ft (914 m) per minute
Service ceiling 30,000 ft (9,145 m)
Range 1,260 miles (2,028 km)
Empty weight: 17,165 lb (7,786 kg)
Normal take¬off 22,500 lb (10,206 kg)
Wing span 54 ft 2 in (16.51 m)
Length 42 ft 3 in (12.88 m)
Height 13 ft 6 in (4.11 m)
Wing area 454.0 sq ft (42.18 sq.m)
Armament: four 20-mm cannon, 2,000 lb (907 kg) bombs or one 18-in (457-mm) torpedo.
Radar: ASH
Equipment: arrestor hook, JATO boost

MK.34
Strategic reconnaissance
Pressurised cabin
Engines: 2 x Rolls-Royce Merlin 113/114, 1690 hp
Fuel capacity: 1269 Gal (200 gal drop tanks)

MK. 35
Engines: 2 x Rolls-Royce Merlin 113/114, 1690 hp

Mk.36
Engines: 2 x Rolls-Royce Merlin 113/114, 1690 hp
Wingspan: 54 ft 2 in / 16.52 m
Length: 44 ft 6 in / 13.57 m
Max speed: 404 mph / 646 kph
Armament: 4 x .303 Browning MG, 4 x 20 mm Hispano cannon
Crew: 2
Radar: AI Mk.X

TF.37
Torpedo fighter
Engines: 2 x Rolls-Royce Merlin 113/114, 1690 hp
Radar: AI/ASV Mk.XIII

NF.38
Radar: AI Mk.IX

TT.39
General Aircraft rebuilt target tug

FB.40
Australian built Mk.VI

PR.40
FB.40 conversions

PR.41
Australian-built Mk.IX & Mk.40 derivatives

T.43
Australian trainer
Engines: Packard Merlin

FB.VI

de Havilland DH 95 Flamingo / Hertfordshire

De Havilland’s first all-metal stressed-skin aircraft, the de Havilland D.H.95 Flamingo, was designed by R. E. Bishop as a medium range passenger transport to carry 12-17 passengers and a crew of three. It featured hydraulically retractable landing gear, split trailing-edge flaps and was powered initially by two 664 kW (890hp) Bristol Perseus XIIc radial engines.

The prototype was first flown by Geoffrey de Havilland Jr at Hatfield on 28 December 1938 and during subsequent flight testing a third, central fin was fitted temporarily. In May 1939 this aircraft was delivered to Guernsey & Jersey Airways Ltd for route-proving trials, linking Heston and Southampton’s Eastleigh Airport with the two principal Channel Islands.

The outbreak of war precluded commercial use on these services, but the Royal Air Force had ordered two Flamingoes for communications duties with No. 24 Squadron and one for The King’s Flight, the last being delivered to RAF Benson on 7 September 1940 as the Hertfordshire. It was transferred to No. 24 Squadron in February 1941, the unit having acquired also the prototype, two aircraft ordered by civilian customers and the fifth airframe which had been used by the manufacturer for development of the Bristol Perseus XVI radial. This engine was fitted to all subsequent examples, including one used by the Royal Navy’s No. 782 Squadron at Donibristle for communications flights to the Orkney and Shetland Islands and to Northern Ireland, and eight flown by BOAC on Middle East services, based at Cairo. The Royal Navy’s Flamingo was the only aircraft to return to civil use after the war, seeing limited service with British Air Transport at Redhill where it was scrapped in 1954. Flamingo production totalled 16 aircraft.

Gallery

D.H.95
Engine: 2 x Bristol Perseus XVI radial, 694kW / 917 hp
Take-off weight: 7983 kg / 17600 lb
Empty weight: 5137 kg / 11325 lb
Wingspan: 21.34 m / 70 ft 0 in
Length: 15.72 m / 51 ft 7 in
Height: 4.65 m / 15 ft 3 in
Wing area: 59.36 sq.m / 638.95 sq ft
Max. Speed: 385 km/h / 239 mph
Cruise speed: 296 km/h / 184 mph
Ceiling: 6370 m / 20900 ft
Range: 1947 km / 1210 miles
Service ceiling : 20899 ft / 6370 m
Wing loading: 27.68 lb/sq.ft / 135.0 kg/sq.m
Crew: 3
Payload: 17pax

de Havilland DH 94 Moth Minor

On 24 August 1931 the company had flown the only example of the de Havilland D.H.81 Swallow Moth, a low wing open-cockpit two-seater powered by a 60 kW (80hp) Gipsy IV engine. With production capacity filled by orders for various models of the Moth the project was discontinued, to be resurrected some years later when advantage could be taken of-some structural techniques used in the Comet and Albatross. Of wooden construction throughout, the prototype D.H.94 Moth Minor was first flown by Captain Geoffrey de Havilland at Hatfield on 22 June 1937. Unlike the earlier Moths, it was flown from the front seat, and incorporated a large perforated air brake under the centre section.

de Havilland DH 94 Moth Minor Article

Production followed and by the outbreak of World War II 71 examples had been completed, including nine Moth Minor Coupe aircraft with built-up rear fuselages and hinged cabin tops. Over 100 had been built by September 1939, but early in 1940, when Hatfield’s production capacity was required urgently for aircraft more vital to the war effort, the Moth Minor drawings, jigs, components and finished but undelivered airframes were delivered to de Havilland Aircraft Pty Ltd at Bankstown, Sydney. More than 40 were supplied to the Royal Australian Air Force.

The total production was about 150.

DH 94 Moth Minor G-AFOM

Five were impressed by the RNZAF 1940-46 for general duties.

Gallery

D.H.94
Engine: 1 x de Havilland Gipsy Minor, 67kW / 90 hp
Max take-off weight: 703 kg / 1550 lb
Empty weight: 446 kg / 983 lb
Wingspan: 11.15 m / 36 ft 7 in
Length: 7.44 m / 24 ft 5 in
Height: 1.93 m / 6 ft 4 in
Wing area: 15.05 sq.m / 162.00 sq ft
Max. speed: 190 km/h / 118 mph
Cruise speed: 161 km/h / 100 mph
Ceiling: 5030 m / 16500 ft
Range: 483 km / 300 miles
Endurance: 6 hr

de Havilland DH 93 Don

With details outlined in Military Specification T.6/36, the Don was to be a three seat, low wing, general purpose trainer, with the same flying characteristics as the new monoplane fighters and bombers then entering service. In the interests of economy, it was to be a combination trainer, suitable as an advanced pilot trainer as well as radio operator and gunnery training.

Arthur E. Hagg designed an aircraft that had four welded steel tube frames bolted together, and attached to a wooden monocoque fuselage which consisted of four resin impregnated moulded plywood sections. The top and bottom sections were curved in heated moulds, while the middle fuselage sections were flat. These sections were strengthened along the joints by wooden stringers which gave the fuselage two distinct lines were the panels overlap.

The wings were built in three sections. The front and rear spars were plywood box structures overlain by two thin layers of diagonal spruce planking, the leading edge being plywood covered.

The de Havilland Gipsy Twelve engine installed originally in the D.H.91 Albatross was renamed Gipsy King for military use and selected to power Air Ministry Specification T.6/36. Fitted with one inverted V-12-cylinder D.H. Gipsy King 1 air-cooled engine producing 525 BHP at 2,400 rpm, Hagg incorporated the ductd reverse-airflow cooling system he had designed for the Albatross. The air intakes. were built into the leading edges of the wings, the air ducted over the top of the engine inside the cowl, down past the cylinders to exit via the centre of the inverted Vee, and out through the back of the engine. This to intake the Don aerodynamically very clean in order to achieve a high performance from a relatively low-powered engine. Maximum speed was 216 mph (348 km/h) at 8,000 ft (2438 in) arid a service ceiling of 21,500 ft (6401 m) and a range of 855 miles (1376 km), stretching out to 890 miles (1432 km) could be attained when configured as a purely communications aircraft.

The Air Ministry dictated that the fuselage had to be big enough for the instructor and air gunner to be able to change seats in flight, arid that two men had to be able to remove and replace the engine in two hours. A variable pitch propeller was to be fitted. The Pupil and instructor were to sit side-by side and have a standard set of instruments for blind flying, while the gunner had to be completely sheltered front the wind, which meant the Don had to be fitted with a turret.

The Air Ministry dictated that the fuselage had to be big enough for the instructor and air gunner to be able to change seats in flight, arid that two men had to be able to remove and replace the engine in two hours. A variable pitch propeller was to be fitted. The Pupil and instructor were to sit side-by side and have a standard set of instruments for blind flying, while the gunner had to be completely sheltered front the wind, which meant the Don had to be fitted with a turret. Extra pressure to finish the aircraft came when the RAF ordered 250 Don Trainers but, just as Hagg was making progress, the Air Ministry sent pages of amendments to Hatfield. These were dated 25th July 1936.

Without warning, in February 1937, the de Havilland Aircraft Company announced that Hagg had resigned, he eventually being replaced by another of the design team, Ronald E. Bishop.

Bishop and his team finished the Don prototype L23871 and it was first flown at Hatfield 18 June 1937. Eight days later Flt/Lr E. R.Symonds flew it at the S.B.A.C. air show.

Following manufacturer’s initial trials, during which small auxiliary fins were fitted beneath the tailplane, the aircraft was transferred to Martlesham Heath on 14th September for official evaluation but fell short of what the Air Ministry had by then decided they wanted.

The prototype was flown by three pilots, who found that “unusual” force was needed to stall the aircraft, for the control column got progressively heavier as the speed slowed and the stick was pulled back. With the flaps up the Don stalled marked with a sharp wing drop. With the flaps down, the wing drop was less marked, but was accompanied by a snatching of the ailerons so that, although control was quickly regained when the nose dropped, for a moment the wing could not be raised with the ailerons. The Don prototype was returned to de Havilland’s where the stalling problems were improved with the addition of a four-foot long strip to the wing leading edge. Small fins were fitted near the ends of the tail plane and thereafter the Don stalled without the vicious wing drop. On 19th January 1938 a pilot from Martlesham came over to Hatfield to retest the aircraft and he considered that the handling was now acceptable provided a spring loaded elevator control system was fitted to reduce the load on the control column during take-off.

A three bladed propeller was fitted to the second Don to improve the take-off, but to achieve a satisfactory climb rate, the engine supercharger had to be boosted to get the revs up to the required level. More changes were made and the mass balances on the elevator, as well as new undercarriage oleo struts, finally produced a satisfactory landing and take-off roll. The test pilots acknowledged that the handling had improved, but criticised the poor view, difficulty in getting in and out, excessive take-off distance, and heavy elevator controls.

Armament consisted of one Lewis gun with three magazines, in an enclosed rotating turret, one fixed Browning gun in the wing and provision for 16 practice bombs tinder wing. llowever the Brownin, machine gun tended to fire erratically and several modifications were made to improve this, but to no avail. The changes needed to satisfy the RAF were still as elusive as ever and then, on 24th June 1938, the Air Ministry told de Havilland’s that the Don was no longer required and the order for all 250 machines was cancelled.

The Air Ministry had selected the Miles Master for advanced pilot training and the Avro Anson and Airspeed Oxford for twin-engine, navigation, radio and air gunnery training. But when it was pointed out that when they cancelled the Don, the RAF would end up with a large number of Gipsy Twelve (renamed Gipsy King for the Don) engines from the production line with no aircraft to put them in. To settle this dilemma de Havilland’s were given an order for 50 three-seat communications aircraft to be converted from the Don Trainer. The first conversion, L2391, went to Martlesham in September 1938 with the turret removed to test its suitability of carrying three people with parachutes. Accessibility for less agile passengers, such as senior officers, was fixed by adding an external step on the fuselage and an internal step with a hand grip. However the pilot’s seat was considered uncomfortable because the fixed back was not high enough and the safety harness prevented the pilot from leaning forward to reach the instruments. In addition there was no cockpit heating and the emergency exit in the roof was difficult i to open if the pilot stayed seated. On 22nd September 1938, the first communications Don, L2391, was completing a fuel consumption test at 10,000 ft (3048 m). The pilots came down to 3,000 ft (914 m) but when they opened the throttle nothing happened, they then tried all sorts of combinations of throttle and propeller settings to no avail. They attempted a cross-wind landing with the undercarriage down but stalled and the undercarriage was torn off and the fuselage then broke near the rear spar.

Only 30 Dons ever flew and even in the communications role the aircraft had a very short service life, with most converted to instructional airframes. Of this total 20 were delivered as engineless airframes and the remainder converted for communications duties with No. 24 Squadron and a number of station Flights.

Gallery

D.H.93
Engine: 1 x de Havilland Gipsy King 1, 391kW
Max take-off weight: 3112 kg / 6861 lb
Empty weight: 2291 kg / 5051 lb
Wingspan: 14.48 m / 47 ft 6 in
Length: 11.38 m / 37 ft 4 in
Height: 2.87 m / 9 ft 5 in
Wing area: 28.24 sq.m / 303.97 sq ft
Max. Speed: 304 km/h / 189 mph
Ceiling: 7100 m / 23300 ft
Range: 1432 km / 890 miles

de Havilland DH 91 Albatross

Designed by A. E. Hagg to an Air Ministry specification for a transatlantic mailplane, the de Havilland D.H.91 Albatross fuselage was made of laminations of cedar ply and balsa wood, built as a monocoque in which the skins bore the load, and had a one-piece wing.

Powered of four de Havilland Gipsy Twelve engines driving constant-speed propellers, and with the landing gear main units electrically retractable, the prototype, initially with twin fins mounted at mid-span on the tailplane, was flown for the first time at Hatfield on 20 May 1937. Directional instability saw a change to more traditional endplate fins with unbalanced rudders and trim tabs. Passenger entry was through a door just 1m tall and the rear fuselage was particularly cramped. In general the cabin was noisy and the ride was uncomfortable.

DH 91 Albatross Article

Problems with the landing gear retraction system resulted in a wheels-up landing for the first prototype on 31 March 1938, and a structural weakness in the rear fuselage was revealed when the second prototype broke into two a few months later when landing during overload trials. Effective modifications were soon evolved and the two prototypes were repaired and used experimentally by Imperial Airways.

Their range made them particularly useful for a shuttle service between the UK and Iceland, and they were impressed for RAF use with No. 271 Squadron in September 1940.
Five Albatrosses, with reduced capacity, additional cabin windows and slotted flaps replacing the split trailing edge flaps, were delivered to Imperial Airways between October 1938 and June 1939. With accommodation for 22 passengers and a crew of four, they saw wartime service on the Bristol-Lisbon and Bristol-Shannon routes until, with their numbers reduced to two by enemy action or accidents, the survivors were scrapped in September 1943.

Gallery

D.H.91
Engines: 4 x de Havilland Gipsy Twelve, 391kW/ 525 hp
Max take-off weight: 13381 kg / 29500 lb
Empty weight: 9630 kg / 21231 lb
Wingspan: 32.00 m / 105 ft 0 in
Length: 21.79 m / 71 ft 6 in
Height: 6.78 m / 22 ft 3 in
Wing area: 100.15 sq.m / 1078.00 sq ft
Wing loading: 27.47 lb/sq.ft / 134.00 kg/sq.m
Max. speed: 362 km/h / 225 mph
Cruise speed: 338 km/h / 210 mph
Ceiling: 5455 m / 17900 ft
Max range: 3,300 miles (5,300 km)
Range: 1674 km / 1040 miles
Crew: 4
Passengers: 22

de Havilland DH 90 Dragonfly

Similar to the D.H.89 Dragon Rapide, the de Havilland D.H.90 Dragonfly has a pre-formed plywood monocoque shell strengthened with spruce stringers. The lower wing centre section was strengthened, making possible deletion of the nacelle/wing root bracing struts and inner bay rigging wires, and so providing easy access to the cabin, with its accommodation for a pilot and four passengers. Powered by two de Havilland Gipsy Major engines, the prototype made its first flight at Hatfield on 12 August 1935 and the first D.H.90A production aircraft, with Gipsy Major II engines, flew in February 1936.
Production totalled 66.

Military purchasers included Canada, Denmark and Sweden.

D.H.90 Dragonfly
Engines: 2 x de Havilland Gipsy Major inline, 97kW, 130 hp
Max take-off weight: 1814 kg / 3999 lb
Empty weight: 1134 kg / 2500 lb
Wingspan: 13.11 m / 43 ft 0 in
Length: 9.65 m / 31 ft 8 in
Height: 2.79 m / 9 ft 2 in
Wing area: 23.78 sq.m / 255.97 sq ft
Wing loading: 15.58 lb/sq.ft / 76.00 kg/sq.m
Max. speed: 125 kts / 232 km/h / 144 mph
Cruise speed: 109 kts / 201 km/h / 125 mph
Service Ceiling: 5515 m / 18100 ft
Range: 543 nm / 1006 km / 625 miles

DH90B
Engines: 2 x Gipsy Major.
Seats: 5.
Cruise: 125 mph.
Stall: 63 mph.

de Havilland DH 89 Dominie Rapide / Dominie / Dragon Six / Breda Ba.44

DH89B       BKS

In 1930, the owner of a London bus company, Edward Hillman, opened air services from London to the seaside. He used an aircraft especially designed for him, the de Havilland Dragon, carrying eight passengers.

de Havilland DH 89 Dominie Article

The Dragon Rapide was a direct development of the Dragon, employing the same structure but having tapered wings, 149kW Gipsy Six engines and a faired-in undercarriage. Known originally as the Dragon Six, it was first (E-4, later CH287) was flown on 17 April 1934 at Hatfield, put in production in 1934, and remained in production for more than ten years.

Construction consisted of a boxlike structured fuselage with plywood panelling on the inside and fabric covering on the outside. Wings had wooden spars and fabric covering.

In 1935, a military Dragon Rapide lost to the Anson as the RAF’s future Coastal Command reconnaissance machine. In 1938, the first RAF Dragon Rapide was delivered for communications duties, and eventually it became a mass production wireless (radio) trainer as well as a utility transport. It received the RAF name Dominie in 1941. Total production for the RAF and Fleet Air Arm was 521, the last being delivered in 1946.

The 48 ft spruce and fabric wings have ailerons on all four and split trailing-edge flaps are on the bottom wings between the engines and fuselage.

It remained in production until 1945 and a total of 738 were built. After the war the Rapide served for several years as interim equipment of BEA, Iraqi Airways, Jersey Airways, KLM and other airlines until more modern equipment became available.

Fine pitch props were often fitted to enable an extra 200 lb payload and better short field and climb performance. The DH Rapide were slightly slower than the original flapless DH.89s. The DH89A was produced in 1935 to Capt Fresson’s requirements (of Highland Airways, Inverness) and incorporated landing flaps, a landing light in the nose, and cabin heating.

In addition many military models were exported, some (for Iraq and Spain) being of the DH 89M armed variant. Typical armament was three machine guns (one fixed, and manually aimed dorsal and ventral) and a bombload of up to 127 kg (280 lb).

A number of Dragon Rapides were also operated on Fairchild-produced floats by Canadian airlines, produced in Canada by de Havilland’s Toronto-based company.

RNZAF Dominie

One example of the DH89A Dragon Rapide was owned by the NZ National Airways Corp (ZK-AHS Mokai) 1948-57 and five were impressed from civil airlines by the RNZAF 1939-45 and used as patrol and navigation aircraft. Fourteen DH89B Dominie served with the RNZAF for training and reconnaissance during 1943-53. The NZ National Airways Corp operated six DH89B 1947-64 (ZK-AKS Teoteo; ZK-ALB Tikaka; ZK-AKU Tawaka; ZK-AKT Tareke; ZK-ALC Tiora; ZK-AKY Tui).

DH.89B ZK-AKT

The Breda Ba.44 was a 1934 licence-built DH.89 Dragon Rapide. The prototype (MM.267) had 2 x 155 hp Colombo S.63 inline 6-cylinder engines mounted on lower, revised wing plan. Production Ba.44 were powered by 2 x 200 hp DH Gipsy Six in lowered position.

Gallery

DH.89 Rapide
Engines: 2 x de Havilland Gipsy Six, 205 hp.
Prop: 2 blade metal.
Wing span: 48 ft 0 in (14.63 m).
Length: 34 ft 6 in (10.51 m).
Height: 10 ft 6 in.
Wing area: 336.0 sq.ft. (31.22 m).
Gross weight: 5,550 lb (2:517 kg).
Empty wt. 3,230 lb.
Fuel capacity 76 ImpG.
Maximum speed: 135 kts / 253 km/h (157 mph).
Typical cruising speed: 132 mph (212 km/h) at 2.000 ft (610 m).
Initial climb rate 867 fpm.
Service ceiling: 19029 ft / 5800 m
Takeoff run 870 ft.
Landing roll 510 ft.
Typical range: 578 miles (930 km).
Seats: 8
Price new: £3500

DH89A Dragon Rapide
Engines: 2 x DH Gipsy Six, 200 hp
Wingspan: 48 ft / 14.63 m
Length: 34 ft 6 in / 10.51m
Max speed: 157 mph / 253 kph
Crew: 1
Passengers: 5

D.H.89A Mk 4
Engines: 2 x de Havilland Gipsy Queen 2, 149kW/ 200 hp
Max take-off weight: 2722 kg / 6001 lb
Empty weight: 1465 kg / 3230 lb
Wingspan: 14.63 m / 47 ft 12 in
Length: 10.52 m / 34 ft 6 in
Height: 3.12 m / 10 ft 3 in
Wing area: 31.21 sq.m / 335.94 sq ft
Max. speed: 241 km/h / 150 mph
Cruise speed: 225 km/h / 140 mph
Ceiling: 4875 m / 16000 ft
Range: 837 km / 520 miles

DH.89B Dominie
Engine: 2 x DH Gipsy Queen III, 200 hp.
Wingspan: 48 ft / 14.63 m
Length: 34 ft 6 in / 10.51m
Max speed: 157 mph / 253 kph
Crew: 1
Cruise: 132 mph.
Pax cap: 8.

de Havilland DH 88 Comet

Sir Macpherson Robertson announced that he would put up the prizes for a race from Mildenhall, England, to Melbourne, Australia, to mark the Centenary of Victoria. de Havilland advertised that they were prepared to produce a 200 mph specially designed racer if anyone would put up the cash, and they received orders for three.

The de Havilland D.H.88 Comet attracted three orders before the February 1934 deadline which had been stipulated by the manufacturer for guaranteed delivery before the Race in October. Purchasers were Mr A. O. Edwards, managing director of the Grosvenor House Hotel, Bernard Rubin, and Jim and Amy Mollison. The Comet was of wooden construction throughout, the front section of the fuselage containing three large fuel tanks behind which were two tandem seats for the pilot and copilot. Two 230 hp high compression de Havilland Gipsy Six R engines were installed, driving Ratier two-position propellers which were set to fine pitch before each flight. These went into coarse pitch automatically at 241km/h, when a sealing disc in the spinner opened to release the unit’s internal pressure and thus activate the control mechanism. Other notable features included the provision of manually retractable landing gear and split trailing-edge flaps.

Designed and built in 7.5 months the first Comet was flown on September 8, 1934, only six weeks before the start of the race.

de Havilland DH.88 Article

Hubert Broad flew the first Comet, intended for the Mollisons, at Hatfield on 8 September 1934. Its Certificate of Airworthiness was issued on 9 October and certificates for the other two aircraft on 12 October, just eight days before the Race.

Dawn on 20 October saw the departure of the first contestants, including the Mollisons’ Black Magic G ACSP, Owen Cathcart-Jones and Ken Waller’s G-ACSR (owned by Rubin) and C. W. A. Scott and T. Campbell Black in G ACSS Grosvenor House. Black Magic accomplished successfully the non-stop London-Baghdad leg but was forced to retire with engine trouble at Allahabad. Cathcart-Jones and Waller, after getting lost and being forced to land in Persia, struggled through to Melbourne to finish fourth in the speed section. They flew straight back, with mail and film, to set an out-and-return record of 131/2 days. Scott and Black were the speed section winners, covering the course in 70 hours 54 minutes; Grosvenor House is now preserved by the Shuttleworth Trust at Old Warden, Bedfordshire.

The start of the England-Australia race

Two further Comets were built, one as a mailplane for the French government and the other for Mr Cyril Nicholson, who sponsored two unsuccessful attempts on the London-Cape record. During the second attempt the crew baled out over Sudan, on 22 September 1935.

Several more records were made, including a New Zealand and back record of 10 days 21.5 hrs.

DH 88 Comet G-ACSS Restoration

Gallery

Replica
Turner, Bill DH88

D.H.88
Engines: 2 x de Havilland Gipsy Six R inline, 172kW / 230 hp
Max take-off weight: 2413 kg / 5320 lb
Empty weight: 1288 kg / 2840 lb
Wingspan: 13.41 m / 44 ft 0 in
Length: 8.84 m / 29 ft 0 in
Height: 3.05 m / 10 ft 0 in
Wing area: 19.69 sq.m / 211.94 sq ft
Max. speed: 381 km/h / 237 mph
Cruise speed: 354 km/h / 220 mph
Ceiling: 5790 m / 19000 ft
Range: 4707 km / 2925 miles at 220 mph
Crew: 2