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Arado Ar 231
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Type: Folding observation aircraft for U-boats
Origin: Arado Flugzeugwerke GmbH, Warnemunde
Models: V1-V6
First Flight: N/A
Service Delivery: N/A
Final Delivery: N/A

Engine:
Hirth HM 501 inverted inline-6 aircooled
Horsepower: 160 hp
Number: 1

Fuel:
Capacity: N/A
Type: N/A

Weights:
Empty: 833kg (1,837 lb.)
Maximum: 1,050kg (2,315 lb.)

 Dimensions:
Wing span: 10.18m (33 ft. 4.5 in.)
Length: 7.81m (25 ft. 7.5 in.)
Height: 3.12m (10 ft. 2.75 in.)
Wing Surface Area: N/A

Performance:
Maximum Speed: 170km/h (106 mph)
Initial climb: N/A
Range: 311 miles (500km)
Service Ceiling: N/A

Armament:
None

Comments:
Designed to fit in a U-boats watertight container, this peculiar little aircraft proved to be unstable on the water and was abandoned in favor of the Fa 330 rotor-kite.