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Biplane Fighter Prototype Aircraft

Imperial Germany | 1917

"The AEG D.I biplane fighter program was marred by crashes of two of the three prototypes - as such the 20-strong pre-series order was cancelled."

Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the AEG D.I Biplane Fighter Prototype Aircraft.
1 x Daimler D.IIIa 6-cylinder liquid-cooled inline piston engine developing 160 horsepower and driving a two-bladed propeller at the nose.
127 mph
205 kph | 111 kts
Max Speed
16,404 ft
5,000 m | 3 miles
Service Ceiling
289 miles
465 km | 251 nm
Operational Range
1,313 ft/min
400 m/min
The nose-to-tail, wingtip-to-wingtip physical qualities of the AEG D.I Biplane Fighter Prototype Aircraft.
20.0 ft
6.10 m
O/A Length
27.9 ft
(8.50 m)
O/A Width
8.7 ft
(2.65 m)
O/A Height
1,510 lb
(685 kg)
Empty Weight
2,072 lb
(940 kg)
Available supported armament and special-mission equipment featured in the design of the AEG D.I Biplane Fighter Prototype Aircraft .
2 x 7.92mm LMG 08/15 machine guns synchronized to fire through the spinning propeller blades.
Notable series variants as part of the AEG D.I family line.
D.I - Base Series Designation; three prototypes completed.
Dr.I - Triplane variant of 1917 based on the D.I design.
Authored By: Staff Writer | Last Edited: 07/31/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.

Allgemeine Elektricitats-Gesellschaft AG (AEG) served the German Empire in World War 1 (1914-1918) as an aircraft maker. Among their contributions was the short-lived AEG D.I biplane fighter. This design managed only three prototypes for its time and a first-flight was held during May 1917. The AEG Dr.I was an off-shoot of the series, developed along the lines of a triplane fighter. It was no more successful with just one example constructed.

The D.I marked the first fighter to be developed by the company and it incorporated traditional biplane qualities - an over-under wing arrangement, fixed wheeled undercarriage (tail-dragger), and open-air cockpit. The wings were slightly unequal span with a single bay each and single struts reinforced the members outboard of the fuselage. The pilot sat in an open-air cockpit under and aft of the upper wing assembly. The engine was fitted forward of the pilot in a streamlined housing and drove a two-bladed propeller at the nose. Internally there was a steel-tubed understructure and fabric skinning was used along the wing surfaces. Proposed armament was 2 x 7.92mm LMG 08/15 machine guns set over the nose and synchronized to fire through the spinning propeller blades. Power was from a Daimler D.IIIa 6-cylinder liquid-cooled inline piston engine of 160 horsepower.

As tested, the D.I managed a top speed of 127 miles per hour and ranged out to 300 miles. Its service ceiling was 16,000 feet and initial rate-of-climb reached 1,313 feet per minute.

A total of three prototypes were eventually completed by AEG with the first arriving in May of 1917. Between August and September of that year, the aircraft saw a lengthening of its fuselage to improve stability. The radiators were changed in the second and third prototypes.

Despite a prototype having crashed during testing, some twenty pre-production forms were ordered by the German Air Service for active evaluations. Following the crash of a second prototype on September 5, 1917, this commitment was abandoned and the D.I fell to history - proving to be unstable and a handful at the controls.

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Global customers who have evaluated and/or operated the AEG D.I. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 3 Units

Contractor(s): Allgemeine Elektricitats-Gesellschaft AG (AEG) - Imperial Germany
National flag of the German Empire

[ German Empire (cancelled) ]
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Image of the AEG D.I
Image from the Public Domain.

Going Further...
The AEG D.I Biplane Fighter Prototype Aircraft appears in the following collections:
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