The number of rotations of a model in the sky is a system which can be checked with a transmitter etc

Det kan også benyttes til andre motortyper

hex aluminum (blue) (use with HD shafts)

Do not connect in reverse

FUTABA 104090 RX FM40

BPS-1 Sensor for GY701/CGY750 & O.S. Xtruck Mega reservedele The number of rotations ofProvides accurate readings and better performance with plug in ease! A competition plus that constantly monitors and maintains rpm at a level you select. Eliminates the need for fan mounted magnets and governor mounts. Perfect for use with O. S. 55HZ R and 91HZ R heli engines equipped with Futaba GY701 and CGY750 gyros. Easy to install. Plugs into the sensor mount built into the engines backplates in seconds. Weight: 8 g