Servo Specs, Reviews, & Comparison Tool
Blue Bird BMS-555DMG - Slim Digital Wing Servo
Specifications
| Last Updated: | 2025-08-04 |
| Modulation: | Digital |
| Torque: |
4.8V: 57.00 oz-in (4.10 kg-cm) 6.0V: 62.00 oz-in (4.46 kg-cm) |
| Speed: |
4.8V: 0.15 sec/60° 6.0V: 0.13 sec/60° |
| Weight: | 0.81 oz (23.0 g) |
| Dimensions: |
Length:1.18 in (30.0 mm) Width:0.39 in (9.9 mm) Height:1.33 in (33.8 mm) |
| Motor Type: | (add) |
| Gear Type: | Metal |
| 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-555DMG is a high-voltage, high-performance "wing" servo, designed to deliver incredible power and precision in a low-profile form factor. This servo is a top-tier choice for the wings of large, high-performance sailplanes, giant-scale aerobatic aircraft, and jets. Its low-profile design allows it to be installed in relatively thin wing structures without a large, drag-inducing bulge. The "D" signifies a digital controller for crisp response and immense holding power, while the "MG" indicates a rugged all-metal gear train for durability. Crucially, this is often a high-voltage (HV) capable servo, meaning it can be run directly from a 2-cell LiPo battery pack, which results in a dramatic increase in both speed and power.
- The defining characteristic of the BMS-555DMG is its ability to deliver monstrous power from a sleek, low-profile case. When mounted in the wing of a giant-scale aerobatic plane, it has the brute force to move large ailerons with precision, even during violent, high-speed tumbles. In a large sailplane, it can actuate large flaps for landing control without being overwhelmed by the aerodynamic forces. The HV capability is a key feature for modern setups, simplifying wiring and unlocking the servo's maximum performance potential.
- For roboticists building large-scale projects, the BMS-555DMG is an exceptional actuator. Its low-profile design and high power make it perfect for applications where a standard-sized servo is too tall or bulky. It would be an excellent choice for the joints of a large but slim robotic arm, for a powerful steering system on a low-slung autonomous rover, or for any mechanism that requires high torque to be delivered from a confined space. The high-voltage capability also aligns perfectly with modern robotics platforms that use LiPo batteries.
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