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.


mass120 g
angular momentum storage0.01 N m s
voltagemin: 3.4 V, max: 6.0 V
maximum power1.05 W
length50 mm
height30 mm
radiation tolerance> 20 krad
maximum voltage8 V
mechanical vibration> 12 Grms
torquemin: -1 mN m, max: 1 mN m
steady state power0.25 W
maximum momentum storage0.018 N m s
operating temperaturemin: -40 C, max: 70 C
width50 mm



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Last updated: 2018-09-23