Contra-rotating propellers
Two-propeller design for improving low-airspeed maneuverability
Contra-rotating propellers
Contra-rotating propellers (CRP) are two coaxial propellers arranged one behind the other in contra-rotation. Power is transferred from a piston powered or turboprop engine via a planetary gear or spur gear transmission. Also known as coaxial contra-rotating propellers, or high-speed propellers, contra-rotating propellers are sometimes referred to as counter-rotating propellers, though the term is much more widely used when referring to propellers on separate non-coaxial shafts turning in opposite directions.
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