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The C.IV was a twin-seat biplane aircraft primarily fielded as reconnaissance platform from 1916 onwards though it also served as a bomber escort and saw service with the German air service through to the end of World War 1in 1918. The C.IV represented one of AEG's most successful wartime ventures with production exceeding estimated 658 examples.

Designed by Georg König and a little larger than the C.III, the C.IV was a conventional biplane which introduced the D.III engine, a fixed forward firing machine gun for the pilot, and a three position variable incidence tailplane (ground adjustable). The wings featured and equal span upper and lower wing assembly with double bays and parallel struts. The wing main structure was welded steel tube, including main spars of 40mm tubes, with wooden ribs which were fabric covered.
The engine, a single Mercedes D.III water-cooled in-line type of 160 horsepower - was mounted in the extreme forward portion of the fuselage with the distinct radiator "horn" protruding the top. The engine powered a two-blade wooden propeller. The forward portion of the fuselage was contoured to an extent, producing a somewhat aerodynamic look while the rest of the body maintained a boxy-like appearance. The fuselage was a primary box structure of welded steel tube decked on top with plywood and covered at the sides and bottom with fabric.
Seating was for two, made up of the pilot and an observer in tandem, with the pilot in the forward cockpit behind a simplistic windscreen. The pilot had access to a single Spandau machine gun offset to his right side. The system was synchronized to fire through the spinning propeller blades without damaging them via an interrupter gear. The observer manned the rear cockpit, facing aft, and sat inside of a Schneider-type gun mount ring. His position was dominated by a Parabellum machine gun with adequate traverse to engage trailing enemy fighters. The J.1 version carried an extra machine gun firing backward and downwards at 45 degrees.
Over 900 lb of armour plate protected the crew and other vital parts.
The undercarriage remained fixed, characterized by the two large main landing gears at front and a simple tail skid under the tail section. The empennage featured a sharp-angled vertical tail fin with low-mounted horizontal stabilizers.


Performance was good for the time with the C.IV yielding a top speed of 98 miles per hour with a service ceiling of 16,404 feet. Endurance from the Mercedes engine was reported to be roughly 3 hours of flight time.

The C.IV entered service with Germany in early 1916 during the spring season. By June of 1917, no fewer than 150 examples were operating along the Western Front alone. The mount proved a success for the time it was fielded and several models continued in service after the cessation of hostilities. An estimated 400 C.IV and C.IVa models were constructed by Fokker factory at the Schwerin.


The C.IV was produced in two other lesser-known variants designated as C.IVa and C.IV.N. The C.IVa distinguished itself from the base model by fitting an Argus engine of 180 horsepower. The C.IV.N was the prototype form of a C.IV night bomber developed sometime in 1917 with increased span three-bay wings. The night bomber form was powered by a single Benz Bz.III series engine of 180 horsepower and would have carried 6 x 110lb bombs externally.

The C.IV was used by the air forces of Bulgaria (which declared war on Romania in September 1916) and Turkey (engaged in war from 1914, but most Turkish Flying Corps aircraft flown by German pilots).

The C.IV was also fielded by Poland in the years following the war (at least 64 examples).

Engine: Mercedes D.III 6 cyl inline, 160hp
Wing span: 44 ft 1.5 in / 13.45m
Wing span: 44.16ft (13.46m)
Length: 23.46ft (7.15m)
Height: 10 ft 11.75 in / 3.35m
Wing area: 419.81 sq.ft / 39 sq.m
Empty wt: 1764 lb / 800 kg
MTOW: 2469 lb / 1120 kg    
Max speed: 98 mph / 158 kph / 85kt
Cruise speed: 87 mph / 140 kph
Climb rate: 6 min to 3280 ft (1000m)
Service ceiling: 16,405ft / 5,000m
Endurance: 4 hr
Max range: 348 sm / 560 km
Seats: 2
Armament: 1 x fixed 0.312 in (7.92mm) LMG 08/15, 1 x trainable 0.312 in (7.92mm) LMG 14 Parabellum mg.
Engine: Argus inline, 180 hp
Engine: Benz Bz.III, 150 hp             
Wing span: 15.3m.
Bomb load: 6 x 110 lb (50 kg) bombs.




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