Servo Specs, Reviews, & Comparison Tool
Blue Bird BMS-811DMG+HS - Digital Hi Speed Servo
Specifications
| Last Updated: | 2025-08-04 |
| Modulation: | Digital |
| Torque: |
4.8V: 70.00 oz-in (5.04 kg-cm) 6.0V: 84.00 oz-in (6.05 kg-cm) |
| Speed: |
4.8V: 0.15 sec/60° 6.0V: 0.13 sec/60° |
| Weight: | 1.59 oz (45.1 g) |
| Dimensions: |
Length:1.60 in (40.6 mm) Width:0.79 in (20.1 mm) Height:1.46 in (37.1 mm) |
| Motor Type: | (add) |
| Gear Type: | Metal |
| Rotation/Support: | Dual Bearings |
| Rotational Range: | (add) |
| Pulse Cycle: | (add) |
| Pulse Width: | (add) |
| Connector Type: | (add) |
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Notes
- The discontinued Blue Bird BMS-811DMG+HS is an elite, high-voltage (HV) digital servo in a compact, sub-micro package, specifically tuned for the highest possible speed. It shares the premium features of its family, including a precise digital controller and a rugged metal gear (MG) train, but its motor and gearing are optimized for blistering velocity, indicated by the "+HS" (High Speed) designation. It is purpose-built for the most demanding tail rotor applications on 450, 500, and even some 550-class helicopters. The combination of its incredible speed and its ability to run on high voltage makes it one of the fastest and most responsive tail servos on the market.
- The essence of the BMS-811DMG+HS is its pursuit of ultimate tail control. A helicopter's tail must react with near-instantaneous speed to commands from the gyro, and this servo is engineered to exceed that requirement. The result is a tail that feels absolutely glued in place, with no wag or blowout, even during the most demanding 3D maneuvers. The metal gears provide the durability to handle the high-frequency vibrations and mechanical stresses of this role, ensuring that this incredible performance is also reliable. It is a servo for competitive pilots who need the best possible tail performance.
- For roboticists, the extreme speed of the BMS-811DMG+HS makes it a specialized tool for high-frequency or rapid-reaction projects. It would be an excellent actuator for a vision-based tracking system that needs to follow a very fast-moving object. It could also be used in research to create high-frequency oscillations for material testing or fluid dynamics experiments. When a compact robotics project has a "need for speed," this servo delivers in spectacular fashion.
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