Satellites and subsystems > Attitude > Attitude actuators > Reaction wheels > RW4 and RW4-HT Reaction Wheel
Key highlights
The Blue Canyon Technologies RW4 reaction wheel is designed to offer long lifetimes and low jitter. It features brushless DC motors and smooth bearings, with a built-in lubrication system. The standard RW4 offers 4.0 Nms momentum and 0.25 Nm torque, while the high torque RW4 offers 2.3 Nms momentum and 0.5 Nm torque. Over 105 RW4s total have launched as of December 2025.
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Last updated: 2025-12-29
RW4 and RW4-HT Reaction Wheel
Technical specs
mass
3.2 kg
angular momentum storage
2.3 to 4 N m s
maximum torque
0.25 to 0.5 N m
voltage
22 to 34 V
maximum power
< 176 W
length
17.5 cm
width
17.5 cm
height
7.2 cm
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