Principles of design and problems involved; transmission system in Cierva Air Horse, equipped with Rolls-Royce Merlin 24 engine; propeller shaft torque is transferred back into engine by coupling located between engine and distribution gear box; for freight helicopter, centrally disposed power units allow complete freedom of access to rear freight compartment; twin engined 4-rotor configuration; suggested 2-speed change gear shown. Before Helicopter Assn.
Rotor drives
Flight
Flight ; 55 , n 2097
1949
2 pages
Article (Journal)
English
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