W18E Reaction Wheel
Bradford Space
Extended-capacity variant of the W18 reaction wheel assembly for small and medium satellite attitude control.
Typed specifications41 values
Discloses 7 of 10 fields engineers filter by in this category (category median 5).
- Mass
- 5 650 g datasheet p.2 4 670 g 2-channel WDE | 5 560 g as published, mode unspecified | 5 650 g RWA
- Envelope (L×W×H)
- Ø295×125 datasheet p.2 258x181x143 2-channel WDE | Ø295×125 RWA
- Angular momentum storage
- 22 N·m·s datasheet p.2 22 N·m·s W18E
- Max torque
- 248 mN·m as published, mode unspecified · vendor page (catalogue a 265 mN·m maximum gross torque | 265 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 50 V nom. · 50Vdc bus option | 28 V nom. · Power bus interface | 50 V nom. · Power bus interface
- 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
- other analogue · datasheet p.2 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 RWA, in-plane (qualification) · datasheet p.2 15 g RMS RWA, out-of-plane (qualification) | 11.2 g RMS WDE, in-plane (qualification) | 17.4 g RMS WDE, out-of-plane (qualification)
- Flight heritage
- SOHO, RadarSat, Seastar, Olympus, INTEGRAL, XMM, Rosetta, Aeolus, BepiColombo datasheet p.1
- Shock qualification
- 2 000 g WDE · datasheet p.2 400 g min · RWA | 2 000 g max · RWA | 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
- Product line
- W-series Reaction Wheel Unit
- Momentum
- 22 Nms
- Maximum Operational Speed
- 4000 RPM
- Number of pulses per revolution
- 240
- Torque
- 0.248 Nm
- Typical Torque Loss at max. speed
- 0.037 Nm
- Static/dynamic imbalance
- 0.5/5.0 g. cm, g.cm2
- Dimensions
- Ø295×125 mm
- Mass
- 5.65 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
- Data interface
- MIL-STD-1553B or analogue
- TM/TC frequency
- up to 10 Hz
- Operational temperature
- -15°C to +60°C
About
The W18E is an extended-capacity variant of Bradford Space’s W18 Reaction Wheel Unit family, providing higher angular momentum storage for satellite attitude control applications requiring additional control authority.
All wheels in the W-series are based on the same proven design, maximising the available heritage database. Features include high torque level over the full speed range, fixed torque rise time, analogue or digital interface, and accurate wheel speed signal.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.