Sinclair Interplanetary pioneered high-reliability, vacuum-lubricated reaction wheels for picosatellites, nanosatellites and microsats. There are currently 76 wheels on-orbit, all working well.

All of these reaction wheels incorporate a built-in digital processor. They can be commanded over a serial bus to produce a desired speed, momentum or torque. They report digital telemetry concerning speed, temperature, voltage, current, and other health parameters.


mass970 g
angular momentum storage1.0 N m s
torquemin: -50 mN m, max: 50 mN m
length150 mm
width140 mm
height42 mm
voltagemin: 24 V, max: 34 V
maximum voltage50 V
maximum power46.7 W
steady state power15.1 W
operating temperaturemin: -40 C, max: 70 C
mechanical vibration> 14 Grms
radiation tolerance> 20 krad



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Last updated: 2018-07-28