What happened to the YB-49?
What happened to the YB-49?
The last operational YB-49 prototype was destroyed on 15 March 1950, during high-speed taxi trials at Muroc Field. The nose wheel began to encounter severe vibration problems and finally collapsed; the aircraft was completely destroyed in the ensuing fire.
How do coaxial rotors work?
Coaxial rotors are two main rotors mounted on one mast, sharing the same axis of rotation but turning in opposite directions, one on top of the other. The control along the vertical axis is produced as a result of different lifts, thus differential torque, of the two rotor discs.
Why do Russian helicopters have two rotors?
Having two coaxial sets of rotors provides symmetry of forces around the central axis for lifting the vehicle and laterally when flying in any direction. Because of the mechanical complexity, many helicopter designs use alternate configurations to avoid problems that arise when only one rotor is used.
What is a double rotor helicopter called?
The Boeing CH-47 Chinook is an American twin-engined, tandem rotor, heavy-lift helicopter developed by American rotorcraft company Vertol and manufactured by Boeing Vertol (later renamed Boeing Helicopter and now named Boeing Rotorcraft Systems).
Can helicopters fly without tail rotor?
Without the tail rotor or other anti-torque mechanisms (e.g. NOTAR), the helicopter would be constantly spinning in the opposite direction of the main rotor when flying. About 10% of the engine power goes to the tail rotor.
What fighters do the RAF use?
| Royal Air Force | |
|---|---|
| Attack | General Atomics MQ-9A Reaper |
| Fighter | Eurofighter Typhoon FGR4 F-35B Lightning |
| Multirole helicopter | Bell Griffin HAR2 Boeing Chinook HC4/5/6/6A Leonardo AW109SP GrandNew Westland Puma HC2 |
| Trainer helicopter | Airbus Helicopters Juno HT1 Airbus Helicopters Jupiter HT1 |
How much can a Chinook sling?
The CH-47F has an empty weight of 24,578 pounds and a maximum gross weight of 50,000 pounds. The CH-47F can lift intra-theater payloads up to 16,000 pounds in high/hot environments.