W45 Reaction Wheel
Bradford Space
Larger-class reaction wheel assembly from Bradford Space's W-series for medium and large satellite platforms.
Typed specifications42 values
Discloses 7 of 10 fields engineers filter by in this category (category median 5).
- Mass
- 6 700 g datasheet p.2 4 670 g 2-channel WDE | 6 700 g RWA
- Envelope (L×W×H)
- Ø365×125 datasheet p.2 258x181x143 2-channel WDE | Ø365×125 RWA
- Angular momentum storage
- 40 N·m·s datasheet p.2 40 N·m·s W45
- Max torque
- 265 mN·m as published, mode unspecified · vendor page (catalogue a 248 mN·m maximum gross torque | 248 mN·m max
- Speed range
- 4 000 rpm product page 4 000 rpm max · maximum operational speed
- Supply voltage
- 28 V nom. · 28Vdc bus option · datasheet p.2 28 V | 50 V nom. · 50Vdc bus option | 50 V nom.
- Power consumption
- 29 W steady state at max constant speed · datasheet p.2 168 W Peak Power Consumption at max. torque and speed | 7.6 W Quiescent Power Consumption | 29 W Steady State Consumption at max. constant speed
- Data interface
- MIL-STD-1553 datasheet p.2 other analogue | MIL-STD-1553 MIL-STD-1553B
- Operating temperature
- -15 °C product page -15–60 °C RWA, qualification | -30–60 °C WDE, qualification
- Peak power
- 168 W at max. torque and speed · datasheet p.2
- Static imbalance
- 0.5 g·cm datasheet p.2
- Dynamic imbalance
- 5 g·cm² datasheet p.2
- Random vibration
- 10 g RMS qualification, in plane · datasheet p.2 15 g RMS qualification, out of plane | 10 g RMS RWA, in-plane (qualification) | 15 g RMS RWA, out-of-plane (qualification) | 11.2 g RMS WDE, in-plane (qualification) +1
- Flight heritage
- SOHO, RadarSat, Seastar, Olympus, INTEGRAL, XMM, Rosetta, Aeolus, BepiColombo datasheet p.1
- Shock qualification
- 400 g RWA - depending on balancing requirements · datasheet p.2 2 000 g WDE | 400–2 000 g RWA, depending on balancing requirements
- Drive electronics
- external separate Wheel Drive Electronics box (WDE) · datasheet p.1
- Zero-speed crossing
- yes proven zero crossings and low RPM performance · datasheet p.1
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier19 lines, in the manufacturer's own wording
- Interface
- Analogue or Digital
- Flight heritage
- SOHO, RadarSat, Seastar, Olympus, Integral, XMM, Rosetta, Aeolus, BepiColombo
- Momentum
- 40 Nms
- Maximum Operational Speed
- 4000 RPM
- Number of pulses per revolution
- 240
- Maximum Gross Torque
- 0.265 Nm
- Typical Torque Loss at max. speed
- 0.037 Nm
- Static/dynamic imbalance
- 0.5/5.0 g. cm, g.cm2
- Dimensions
- Ø365×125 mm
- Mass
- 6.70 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
- TM/TC frequency
- up to 10 Hz
- Operating temperature
- -15°C to +60°C
About
The W45 Reaction Wheel Unit is a larger-class member of Bradford Space’s W-series reaction wheel family, sized for medium and large satellite platforms requiring higher angular momentum control range.
All wheels are based on the same proven design maximising available flight heritage, including missions such as SOHO, RadarSat, Seastar, Olympus, Integral, XMM, Rosetta, Aeolus, and BepiColombo. Features analogue or digital interface and accurate wheel speed signal reporting.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.