The main rotor of the doomed helicopter that crashed into the Hudson River was finally recovered Monday — which could provide crucial information as investigators continue to probe what caused the ...
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 ...
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