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Bell Xp-77




The Bell XP-77 development was initiated by the U.S. Army Air Corps to produce a simplified 'lightweight' Fighter Aircraft using so-called 'non-strategic' materials. The project with the Bell Aircraft Corporation was initiated in October 1941 . The aircraft was a single-engine low-wing Monoplane , with Tricycle Landing Gear . While originally conceived using an air-cooled 500 hp Ranger XV-770 -9 twelve cylinder engine with a Supercharger , the prototypes were delivered with the unsupercharged '''XV-770-7''' engine due to development delays. The planned armament was two 20 Mm Cannon and two 0.5 Inch Machine Guns , with the option of either a 300 lb bomb or 325 lb depth charge.

The project suffered numerous delays, many for correction of excess weight issues. The first XP-77 flew April 1 , 1944 at Wright Field . These trials revealed vibration problems due to directly mounting the engine to the airframe, without vibration isolation. The long nose and rear-mounted cockpit inhibited visibility relative to operational aircraft of the time. Further trials were conducted at the A.A.F. Proving Ground at Eglin Field with the second aircraft where it was destroyed due to entry into an inverted Spin while attempting an Immelmann , and the pilot left his aircraft to its own devices. The development was terminated in December 1944 .


SPECIFICATIONS (BELL XP-77)

  plane Or Copter plane
  jet Or Prop prop
  crew One
  length Main 22 ft 10 in
  length Alt 696 m
  span Main 27 ft 6 in
  span Alt 838 m
  height Main 8 ft 2 in
  height Alt 249 m
  area Main 100 ft&2
  area Alt 93 m&2
  empty Weight Main 2,855 lb
  empty Weight Alt 1,295 kg
  loaded Weight Main lb
  loaded Weight Alt kg
  max Takeoff Weight Main 4,028 lb
  max Takeoff Weight Alt 1,827 kg
  engine (prop) Ranger XV-770 -7
  type Of Prop liquid-cooled inverted V-12
  number Of Props 1
  power Main 520 hp
  power Alt 388 kW
  max Speed Main 330 mph
  max Speed Alt 531 km/h
  range Main 550 miles
  range Alt 885 km
  ceiling Main 30,100 ft
  ceiling Alt 9,177 m
  climb Rate Main 3,600 ft/min
  climb Rate Alt 183 m/s
  loading Main lb/ft&2
  loading Alt kg/m&2
  power/mass Main hp/lb
  power/mass Alt kW/kg




REFERENCE

  • Green, William (1961). ''War Planes of the Second World War - Fighters'' (Vol 4). London: Macdonald.



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