Servo Specs, Reviews, & Comparison Tool
Blue Bird BMS-410 - Economy Servo
Specifications
| Last Updated: | 2025-08-04 |
| Modulation: | Digital |
| Torque: |
4.8V: 45.80 oz-in (3.30 kg-cm) 6.0V: 60.00 oz-in (4.32 kg-cm) |
| Speed: |
4.8V: 0.25 sec/60° 6.0V: 0.22 sec/60° |
| Weight: | 1.48 oz (42.0 g) |
| Dimensions: |
Length:1.60 in (40.6 mm) Width:0.80 in (20.3 mm) Height:1.50 in (38.1 mm) |
| Motor Type: | (add) |
| Gear Type: | (add) |
| Rotation/Support: | (add) |
| Rotational Range: | (add) |
| Pulse Cycle: | (add) |
| Pulse Width: | (add) |
| Connector Type: | (add) |
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Notes
- The discontinued Blue Bird BMS-410 is a specialized analog servo designed with a very specific application in mind: high-performance hand-launch gliders (HLG) and discus-launch gliders (DLG). In this highly competitive discipline, servos must be incredibly small, lightweight, and precise. The BMS-410 is one of the original servos that helped define this category. It is an ultra-thin servo, allowing it to be mounted directly inside the impossibly thin wings of a modern DLG. This allows for short, direct, and slop-free linkages to the ailerons and flaps, which is critical for precise control. Its analog nature provides smooth, reliable operation with a very low current draw, helping to conserve precious battery life during long flights.
- The BMS-410 is a legend in the soaring community. Its reputation is built on its perfect suitability for the task. It provides the right balance of small size, low weight, and adequate precision that DLG pilots require. While it may not have the raw power of larger servos, it has exactly what is needed to actuate the small control surfaces of a lightweight glider, allowing the pilot to make the minute adjustments to the wing's camber that are necessary to detect and exploit weak thermal lift. It is a classic, purpose-built tool that has helped many pilots reach the top of the podium.
- While highly specialized, the BMS-410’s unique characteristics could be leveraged by roboticists for very specific projects. Its ultra-thin profile and low weight make it an ideal candidate for building extremely compact and lightweight mechanisms. It could be used to create the articulated elements of a robotic insect or the feather-like control surfaces on a bio-inspired flying robot. Any project where the actuator's thickness is the primary design constraint would find a unique solution in the BMS-410.
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