Vintage Aviation News on MSN
Grounded dreams: Lockheed XH-51 – the rigid-rotor masterpiece of the 1960s
The Lockheed XH-51 was an experimental rigid-rotor helicopter developed in the 1960s to test high-speed rotary-wing flight ...
Forensic engineers examined the main rotor driveshaft that had sheared just below the teeter stops. Teeter stops are fitted to the main rotor driveshaft to prevent the main rotor spindles from ...
Specially shaped helicopter rotor blades with a kink at the outer part make it possible to reduce the radiating annoying rotor noise [1]. Against this background, the aeroelastic behaviour together ...
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