Air-operated motor for aircraft or ship - comprises first blade on which second one oscillates freely or under control

摘要

The air-operatd motor comprises a first blade, to which a second one is attached, being arranged to oscillate either freely or under control. It is mounted in an air current, e.g. on an aircraft or boat, there being a number of such motors one after the other in a Mach flow angle, so as to make use of the induced frequency.