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Technical Specifications
Last Updated: 2026-10-23| Identity | |
| Brand |  |
| Product Number | BMS-115WV+ |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
98.62 oz-in
7.10 kg-cm
0.7 N-m
7.4V
91.67 oz-in
6.60 kg-cm
0.6 N-m
6.0V
76.40 oz-in
5.50 kg-cm
0.5 N-m
3.7V
50.00 oz-in
3.60 kg-cm
0.4 N-m
|
| Speed |
8.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
7.4V
0.10 sec/60°
600.0 deg/s
100.0 RPM
6.0V
0.13 sec/60°
461.5 deg/s
76.9 RPM
3.7V
0.20 sec/60°
300.0 deg/s
50.0 RPM
|
| Physical | |
| Weight | 0.39 oz11.0 gAverage |
| Dimensions |
L 0.913 in W 0.394 in H 0.906 in L 23.2 mm W 10.0 mm H 23.0 mm |
| Case Material | Nylon |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | FET |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 90° |
| Mechanical Limit | 90° |
| Pulse Cycle | 3 ms |
| Pulse Width | 1100-1900 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 3.6–8.4 V |
| Power Source | LiPo | LiFe |
| Temperature | -20–60 °C-4–140 °F |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 150 mm5.91 in |
| Origin | |
| Country of Origin | Taiwan |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Weight | Average Lighter than 49% of 597 Digital Micro servos |
Performance Analysis
| Shaft Power | 0.46–2.03 W |
| Power Density | 6.217 W/in³ More power-dense than 86% of 563 Digital Micro servos |
| Torque Density | 4.5455 oz-in/g |
| Torque-to-Volume Ratio | 153.42 oz-in/in³ |
| Speed-to-Weight | 0.45455 (1/sec·g) |
| Speed-Torque Trade-off | 10.00 |
| Voltage Range Width | 4.8 V Wider voltage range than 98% of 496 Digital Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0025 Finer dead band than 22% of 182 Digital Micro servos |
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Reviews (12)
Includes 12 reviews aggregated from around the web.
Owners are very happy with this servo, especially in sailplanes, where it is used for flaps, ailerons, elevator, rudder and spoilers. Buyers describe it as strong, precise and rock solid, with tight, centered, slop-free movement. It works with whatever voltage it is given and is seen as very good value, and some prefer it over similar small servos from other brands. One owner notes it is somewhat large, and a couple say it is too early to judge long-term life. About a dozen reviews were found and none reported a failure.
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