German scientist, Doctor Friedrich Doblhoff, sits in his jet propelled helicopter at Wright Field in Ohio.
Ohio United States USA Date:1946 Duration:1 min 9 sec Sound:NO SOUND
German scientist, Doctor Friedrich Doblhoff, during 'Operation Paper-clip' at Wright Field in Ohio United States. He sits in his helicopter (type : WNF-342 version3) having jet-propelled rotor blades. A U.S airmen, in flight suit, stands outside the helicopter in the field. The blades of the helicopter rotate, speed up, slow down and speed up again during tests.
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