It is possible to trace, in flying equipment of birds, feathered versions of many of refinements which render modern airplane more efficient than predecessors; in study of owls, there is possibility of connection between manner in which their strikingly silent flight is achieved and pressing problem of silencing airscrews.
Silent flight of owls
Roy Aeronautical Soc -- J
Royal Aeronautical Society -- Journal ; 38 , n 286
1934
7 pages
Aufsatz (Zeitschrift)
Englisch
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