To cope with various problems arising from constant increase in power of engines, in aircraft speeds and in operational heights, contra-rotating (counter-rotating) propeller has been developed in England to stage justifying its being standardized and produced by several companies, which employ same underlying principles, but with differences in methods of applying principle to practice.
Rotol contra-rotating propeller
Automotive Aviation Industries
Automotive and Aviation Industries ; 86 , n 12
1942
Article (Journal)
English
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