Satellites and subsystems > Attitude > Attitude actuators > Reaction wheels > RSI 12 Momentum and Reaction Wheels 4 – 12 Nms with integrated Wheel Drive Electronics
Key highlights
TELDIX® Space Wheels deliver industry leading capability and reliability for spacecraft attitude control. They are available with an angular momentum storage capacity spanning a range between 0.04 Nms and 68 Nms.
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Last updated: 2025-07-29
RSI 12 Momentum and Reaction Wheels 4 – 12 Nms with integrated Wheel Drive Electronics
Technical specs
speed limiter (EMF)
7000 rpm (RSI 4-75/60)
7500 rpm (RSI 12-75/60)
7500 rpm (RSI 12-75/60)
qualification/protoflight temperature
-10 to +55 °C (mineral oil)
-25 to +75 °C (synthetic oil)
-25 to +75 °C (synthetic oil)
torque
75 mNm (Motor torque at nominal speed)
peak power
90 W (Maximum torque at nominal speed)
input current
< 3.75 A
supply voltage
24 to 51 V DC
angular momentum storage
4 N m s at nominal speed (RSI 4-75/60)
lifetime
> 15 years (in orbit)
operating temperature
-20 to +70 °C (synthetic oil)
-5 to +50 °C (mineral oil)
-5 to +50 °C (mineral oil)
survival temperature
-40 to +75 °C (synthetic oil)
-20 to +60 °C (mineral oil)
-20 to +60 °C (mineral oil)
mass
4.85 kg (RSI 12-75/60)
3.7 kg (RSI 4-75/60)
3.7 kg (RSI 4-75/60)
height
85 mm
diameter
247 mm (RSI 12-75/60)
222 mm (RSI 4-75/60)
222 mm (RSI 4-75/60)
operational speed range
-6000 to 6000 rpm
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