PlaneSpottingWorld welcomes all new members! Please gives your ideas at the Terminal.
Bell 48
From PlaneSpottingWorld, for aviation fans everywhere
| R-12 (Model 48) | |
|---|---|
| Type | five/eight seat utility helicopter |
| Manufacturer | Bell Helicopter |
| Maiden flight | 1946 |
| Primary user | United States Air Force |
| Number built | 13 |
| Developed from | Bell 47 |
The Bell R-12 (company Model 48) was an American 1940s utility built by Bell Helicopter company.
Contents |
[edit] Development
During 1946, Bell began developed of an enlarged version of the Model 47. Two prototypes were ordered by the United States Air Force as the XR-12. It was powered by a Pratt & Whitney Pratt & Whitney R-1340 radial engine and seated five. Another prototype (the XR-12B) with a more powerful R-1340 and seating for eight was also ordered. With a change in designation system the helicopter was re-designated the H-12. Test were not satisfactory and ten pre-production and 34 production aircraft were cancelled.
[edit] Variants
- XR-12
- prototype, redesignated XH-12, two built.
- R-12A
- production version, 34 on order cancelled.
- XR-12B
- prototype with more powerful engine and increased seating, re-designated XH-12B, one built.
- YR-12B
- as XR-12B but with R-1340-55 engines, re-designated YH-12B, ten built.
- XH-12
- XR-12 re-designated in 1947.
- XH-12B
- XR-12B re-designated in 1947.
- YH-12B
- YR-12B re-designated in 1947.
[edit] Operators
[edit] Specifications (XR-12B)
This aircraft article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them.[edit] General characteristics
- Crew: 4
- Length: ()
- Rotor diameter: 47 ft 6 in (14.48 m)
- Height: ()
- Disc area: 1,772 ft² (164.62 m²)
- Max takeoff weight: 6,286 lb (2851 kg)
- Powerplant: 1× Pratt & Whitney R-1340-55 Wasp radial piston, 600 hp (447 kW)
- Propellers: 1 rotor, 1 per engine
[edit] Performance
- Maximum speed: 105 mph (169 km/h)
- Cruise speed: 90 mph (145 km/h)
- Range: 300 miles (483 km)
[edit] References
- Andrade, John M. U.S.Military Aircraft Designation and Serials since 1909. Leicester, UK: Midland Counties Publications, 1979. ISBN 0-904597-22-9.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). London, Orbis Publishing.
[edit] External links
[edit] See also
[edit] Designation sequence
Lists relating to aviation | |
|---|---|
| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
Lists relating to aviation | |
|---|---|
| General | Timeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines |
| Military | Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft |
| Notable incidents and accidents | Military aviation · Airliners · General aviation · Famous aviation-related deaths |
| Records | Flight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft |
