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AEG D.I


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."



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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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.
Propulsion
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
Rate-of-Climb
City-to-City Ranges
Operational range when compared to distances between major cities (in KM).
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the AEG D.I Biplane Fighter Prototype Aircraft.
1
(MANNED)
Crew
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)
MTOW
Design Balance
The three qualities reflected below are altitude, speed, and range. The more full the box, the more balanced the design.
RANGE
ALT
SPEED
Armament
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.
Variants
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.
Operators
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) ]
Relative Max Speed
Hi: 150mph
Lo: 75mph
Aircraft Max Listed Speed (127mph).

Graph Average of 113 MPH.
Era Crossover
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Max Alt Visualization
Small airplane graphic
Production Comparison
3
36183
44000
Entry compared against Ilyushin IL-2 (military) and Cessna 172 (civilian) total production.
MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030
Aviation Timeline
EarlyYrs
WWI
Interwar
WWII
ColdWar
Postwar
Modern
Future
1 / 1
Image of the AEG D.I
Image from the Public Domain.

Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.
AIR-TO-AIR COMBAT
X-PLANE
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Going Further...
The AEG D.I Biplane Fighter Prototype Aircraft appears in the following collections:
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