O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
A.E.G. DJ I
This aircraft was designed as an armoured single-seat ground attack fighter, roughly equivalent to the British Sopwith Salamander. It first flew in September 1918, but the Armistice stopped further development. Braced with two bay I struts, it had no flying or landing cables. The fuselage was skinned with sheet aluminium. Engine, 195 h.p. Benz Bz IIIb vee eight, driving four-blade airscrew. Span, 10.0 m. (32 ft. 9 3/4 in.). Length, 6.69 m. (22 ft. 11 1/4 in.). Height, 3 0 m. (9 ft. 10 1/8 in.). Weights: Empty, 1,185 kg. (2,607 lb.). Loaded, 1,370 kg. (3,014 lb.). Speed, 180 km.hr. (112.5 m.p.h.). Climb, 1,000 m. (3,280 ft.) in 4 min.
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W.Green, G.Swanborough The Complete Book of Fighters
A.E.G. DJ I Germany
Pursuing the concept of the single-seat armoured ground attack fighter, A.E.G. had begun the development of an aerodynamically advanced biplane as a Panzer-Einsitzer before the initiation of flight testing of the PE triplane, and this, the DJ I, was to be flown in July 1918. Two prototypes of the DJ I were completed with the 195 hp Benz Bz IIIb engine and a third prototype with the 240 hp Maybach Mb IVa engine, armament standardising on twin synchronised 7,92-mm LMG 08/15 guns with provision for anti-personnel bombs. An equi-span two-bay biplane, the DJ I wing cellule dispensed with flying wires, interplane bracing being provided by I-section struts. The wings were of dural construction with fabric covering, and the fuselage, which embodied some armour protection for the engine, fuel tank and pilot, had sheet aluminium skinning. Hostilities terminated while flight testing of the DJ I was still in progress. The following data relate to the Benz-engined version.
Max speed, 112 mph (180 km/h).
Empty weight, 2,606 lb (1182 kg).
Loaded weight. 3.031 lb (1375 kg).
Span, 32 ft 9 3/4 in (10,00 m).
Length, 21ft 11 1/3 in (6,69 m).
Height, 9 ft 10 1/8 in (3,00 m).
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J.Herris AEG Aircraft of WWI (A Centennial Perspective on Great War Airplanes 16)
AEG DJ.I Biplane
Disappointed by the mediocre flight characteristics and low speed of the AEG DJ.I triplane, AEG engineers brought out a biplane version, the AEG DJ.I fighter, also powered by the 195 hp Benz Bz.IIIb V-8 engine. Sharing the triplane's armored fuselage design, the DJ.I had a wireless wing cellule to minimize damage from ground fire. The construction began in March and was completed in May 1918, but according to Idflieg it was not until August that the flight tests began. The reason for the delay is not known but may have been caused by unavailability of the experimental Benz V-8 engine. Converting to a biplane wing cellule improved the aircraft's speed and climb rate. In a 1920 aircraft inventory compiled by Luftfriko there were two AEG DJ.I aircraft listed as "property of the factory." Whether this referred to the DJ.I triplane and biplane or the second DJ.I fighter described below has not been determined.
A second AEG DJ.I powered by a 245 hp Maybach Mb.IVa engine was under construction from May to July 1918. In September we learn that the Maybach engine was to be replaced by a new one, pointing to the probability that the second DJ.I had performed some flight trials.
A third AEG DJ.I was reported under construction in September 1918, but there is no record of completion. That three DJ.I prototype fighters existed was consistent with the Idflieg policy of ordering one prototype for flight tests, one for static-load testing, and one held in reserve.
AEG Armored Aircraft Specifications
AEG J.I AEG J.II AEG DJ.I Triplane AEG DJ.I Biplane AEG G.IVk
Engine 200 hp Benz Bz.IV 200 hp Benz Bz.IV 195 hp Benz Bz.IIIb V-8 195 hp Benz Bz.IIIb V-8 Two 260 hp Mercedes D.IVa
Span, Upper 13.00m 13.00m 11.20 m 10.00 m 18.00 m
Span, Lower 12.48m 12.48m 10.00 m 9.90 m 17.50 m
Chord, Upper 1.65m/1.85m 1.85m 1.475 m 1.80 m 2.40 m
Chord, Lower 1.65m/1.85m 1.85m 0.825 m 1.60 m 2.40 m
Gap 1.95m 1.95m 1.00 m 2.00 m 2.60 m
Wing Area 39.0 m2/43.6 m2 43.6 m2 31.3 m2 30.5 m2 65 m2
Length 7.20m 7.86m - 6.90 m 9.00 m
Height 3.3m 3.3m - - -
Track 2.19m 2.15m 1.90 m 1.90 m 4.80 m
Empty Weight 1,456 kg 1,480 kg 1,182 kg 1,185 kg 2,700 kg
Loaded Weight 1,876 kg 1,900 kg 1,412 kg 1,375 kg 3,150 kg
Maximum Speed 140 km/h 140 km/h 166 kmh 180 kmh 150 kmh
Climb to 1,000m 6.1 minutes 6 minutes 5.8 minutes 4 minutes 9 minutes
Climb to 2,000m 15.9 minutes 14 minutes - - -
Climb to 3,000m 31.6 minutes 30 minutes - - -
Climb to 4,000m - - 48 minutes - -
Armament 1 flexible machine gun, some had 2 fixed machine guns 1 flexible machine gun, 2 fixed machine guns 2 fixed machine guns, 4 small bombs 2 fixed machine guns, 4 small bombs 2 flexible machine guns, 2 flexible 20mm Becker cannon, small bombs
Notes:
1. AEG J.I specs are shown as early/late; later production AEG J.I aircraft had 1.85m chord and wing area of 43.6 m2. AEG J.I dihedral = 2°
2. At least 20 J.II aircraft fitted with a flexible 20mm Becker cannon in place of the 2 fixed machine guns.
3. The middle wing of the AEG DJ.I Triplane had a span of 10.60 m and a chord of 0.825 m.
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M.Dusing German Aviation Industry in WWI. Volume 1 (A Centennial Perspective on Great War Airplanes 84)
Allgemeine Elektrizitats-Gesellschaft, Flugzeugfabrik, Hennigsdorf (AEG)
Aircraft Development:
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Similarly, an attempt was made to create an armored single-seater to attack the low-flying J planes. The fuselage of this aircraft consisted of an armored hull housing the engine, gasoline tanks, machine guns and pilot. Attached to this was an aluminum tail so that gunfire and flak hits did not damage the power-bearing structure of the aircraft. To increase speed, the same type was also designed as a biplane, in which all bracing was eliminated to achieve greater gunnery safety.
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