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Old 15th December 2006 | 18:31
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slowrotor
 
Joined: Jul 2003
Posts: 440
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From: Port Townsend,WA. USA
Stopped Rotor
Dave,
Danish pioneer Jens Ellchammer, in 1914, built a coaxial with the lower rotor central disc covered in fabric to serve as a wing or even as a fixed parachute.
I think it was the first compound helicopter. Made hops only.
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