Master Airscrew MA0940NEP Electric Series 9x4 Reverse/Pusher Propeller  [MA0940NEP]

9x4 reverse/pusher electric propeller

This Master Airscrew MA0940NEP 9x4 propeller is an RC-scale electric accessory specified as a reverse/pusher type. The product name encodes the size and mounting orientation so use it for rear-mounted pusher motor arrangements where the propeller operates with reverse rotation relative to standard tractor props.

Focus when fitting: confirm the prop fits your motor shaft and spinner arrangement, verify rotation direction from your electronic speed controller and motor setup, and check clearance to airframe surfaces and control linkages. Balance the prop on a static balancer before flight to reduce vibration that can affect flight handling and onboard electronics.

Tuning notes: a reverse/pusher propeller changes how thrust is delivered around the airframe and can alter slipstream over control surfaces; expect to fine-tune throttle response and control throws after switching between tractor and pusher configurations. Use incremental power runs during ground testing to validate motor temperature, ESC behaviour, and overall airframe response.