title: Akaflieg Berlin B9
text: # Akaflieg Berlin B9
  
  The Akaflieg Berlin B 9 was a twin-engined experimental aircraft, developed by Akaflieg Berlin and Flugtechnische Fachgruppe in the 1940s. It was designed to examine the benefits of having a pilot in a prone position. The aircraft was flown in 1943, but was eventually abandoned.
  
  ## Specifications
  
  Data from FFG-Berlin B9
  
  General characteristics
  
  * Crew: One
  * Length: 6.06 m (19 ft 11 in)
  * Wingspan: 9.4 m (30 ft 10 in)
  * Height: 2.32 m (7 ft 7 in)
  * Wing area: 11.9 $m^2$ (128 sq ft)
  * Empty weight: 940 kg (2,072 lb)
  * Gross weight: 1,115 kg (2,458 lb)
  * Fuel capacity: 95L
  * Powerplant: 2 × Hirth HM 500 4-cylinder air-cooled inverted in-line piston engine, 77 kW (103 hp)105PS each
  
  Performance
  
  * Maximum speed: 250 km/h (160 mph, 130 kn)
  * Service ceiling: 4,000 m (13,000 ft)
  