Umbra Reaction Wheel
Umbra Lab Inc.
Precision reaction wheel providing more than 2 Nms of momentum for small satellite attitude control, designed for NASA-compliant demisability.
Technical specifications
- Max Dimensions
- 6.0 in x 6.0 in x 1.5 in
- Mass
- 2 kg
- Input Voltage Range
- 24-32 V
- Input Voltage Nominal
- 28 V
- Peak Power
- 100 W at maximum torque (typical)
- Average Power
- 5 W steady state draw
- Momentum
- ±2.0 Nms (at max rpm)
- Max Torque
- 250 mNm
- Electrical Interface
- 15-Socket Micro-D Connector
- Data Interface
- RS-485
- Intended Space Environment
- Multi-orbit
- Heritage
- Qualification testing complete in Q2 2026
- Design Life
- 5+ Years
- Production
- Assembled and tested in the USA
- Random Vibe
- Qualified to 14.16 Grms profile enveloping GEVS, Falcon 9, SpaceX Rideshare, and Electron levels
- Shock
- Qualified to 1000g peak profile
- Operating Temperature
- -34°C to 70°C
- Survival Temperature
- -34°C to 80°C
- Total Ionizing Dose
- Designed to withstand at least 30 krad TID
About
The Umbra Reaction Wheel delivers precise and reliable attitude control for small satellites with a focus on responsible space debris mitigation. Engineered for complete demisability upon atmospheric re-entry per NASA-STD-8719.14C, this reaction wheel offers more than 2 Nms of momentum and high torque in a compact, lightweight package. It features redundant Hall Effect control and ABEC 7 ceramic angular contact bearings for reliability, and integrates via RS-485 communication with any GNC system, including Umbra’s own fully integrated GNC solution.
Documentation
- REACTION-WHEEL.pdf umbra.space ↗
- Umbra-Reaction-Wheel-User-Guide-5021D0001-REV-01-1-1.pdf umbra.space ↗
Need the full ICD, test reports or a specific revision? Ask the supplier directly.
