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Post Info TOPIC: Gerhardt Helicopter or Gyroplane Prototype


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Posts: 281
Date: Mar 1, 2016
Gerhardt Helicopter or Gyroplane Prototype
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Hi,

Mr. William Fredrick Gergardt designed and built a helicopter or a gyroplane in 1930s,it had

a large diameter propeller,page 285;

https://books.google.com.eg/books?id=j0sGSc7ejTEC&printsec=frontcover&hl=ar&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false



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