W18ES Reaction Wheel
Bradford Space
High-capacity W18-series reaction wheel variant offering extended momentum storage for demanding pointing missions.
Key figurescomparable across the catalogue
- Mass
- 6.02 kg
- Power
- 168 W
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- Interface
- Analogue or Digital
- Product line
- W-series Reaction Wheel Unit
- Momentum
- 25 Nms
- Maximum Operational Speed
- 4000 RPM
- Number of pulses per revolution
- 240
- RWA Dimensions
- Ø295×125 mm
- Mass
- 6.02 kg
- 2-channel WDE Dimensions
- 258×181×143 mm
- 2-channel WDE Mass
- 4.67 kg
- Torque rise/fall time
- 80 ms
- Peak Power Consumption at max. torque and speed
- 168 W
- Steady State Consumption at max. constant speed
- 29 W
- Quiescent Power Consumption
- 7.6 W
- Supply voltage
- 28Vdc or 50Vdc
- Frequency
- up to 10 Hz
- Operating temperature
- -15°C to +60°C
About
The W18ES is a high-capacity variant of Bradford Space’s W18 Reaction Wheel Unit family, offering extended angular momentum storage. Part of the flight-proven W-series line used across LEO, MEO, HEO, GEO, planetary and interplanetary missions.
Features include high torque level over the full speed range, fixed torque rise time allowing precise and repeatable control, and proven low-RPM/zero-crossing performance with excellent micro-vibration characteristics.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.