W18 Reaction Wheel
Bradford Space
Compact reaction wheel assembly with analogue or digital interface, proven zero-crossing and low-RPM performance.
Key figurescomparable across the catalogue
- Mass
- 5.2 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
- Flight heritage
- SOHO, RadarSat, Seastar, Olympus, Integral, XMM, Rosetta, Aeolus, BepiColombo
- Momentum
- 18 Nms
- Maximum Operational Speed
- 4000 RPM
- Maximum Gross Torque
- 0.265 Nm
- RWA Dimensions
- Ø295×125 mm
- Mass
- 5.20 kg
- 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
- Operating temperature
- -15°C to +60°C
About
The W18 Reaction Wheel Unit (RWA) from Bradford Space is part of a heritage-proven reaction wheel family used for satellite attitude control. A minimum of three sets of RWA are needed per satellite to allow rotational control around the three axes, with a fourth generally present for redundancy.
The W18 offers high torque level over the full speed range, fixed torque rise time for precise and repeatable control, analogue or digital interface options, and accurate wheel speed signal reporting. Most braking energy is dissipated within the wheel drive electronics, with no energy injected back into the spacecraft power bus.
Flight heritage includes missions such as SOHO, RadarSat, Seastar, Olympus, Integral, XMM, Rosetta, Aeolus, and BepiColombo.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.