Servo Specs, Reviews, & Comparison Tool
Blue Bird BMS-990DMG - Low Profile Digital Racing Servo
Specifications
| Last Updated: | 2025-08-04 |
| Modulation: | Digital |
| Torque: |
4.8V: 100.00 oz-in (7.20 kg-cm) 6.0V: 125.00 oz-in (9.00 kg-cm) |
| Speed: |
4.8V: 0.11 sec/60° 6.0V: 0.09 sec/60° |
| Weight: | 1.59 oz (45.0 g) |
| Dimensions: |
Length:1.60 in (40.6 mm) Width:0.83 in (21.1 mm) Height:1.00 in (25.4 mm) |
| Motor Type: | Coreless |
| Gear Type: | Metal |
| Rotation/Support: | Single Bearing |
| Rotational Range: | 120° |
| Pulse Cycle: | (add) |
| Pulse Width: | (add) |
| Connector Type: | JR |
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Notes
- The discontinued Blue Bird BMS-990DMG is a high-performance, high-voltage (HV) digital servo in a unique "mid-size" form factor. It is larger and more powerful than a standard servo but more compact than a giant-scale servo, filling a critical niche in the market. It is designed for demanding applications that require more power than a standard servo can provide, such as the control surfaces on .90 to 1.20 size glow aircraft, mid-sized jets, and 700-class helicopters. It features a precise digital (D) controller and a very robust metal gear (MG) train to handle its significant power output. The HV capability allows it to produce immense torque and speed when powered by a 2S LiPo.
- The key feature of the BMS-990DMG is its ability to provide "giant-scale" power in a more compact and convenient package. For many aircraft in the 90-120 size class, a standard servo is not quite enough, but a full giant-scale servo is overkill and difficult to fit. The BMS-990DMG is the perfect solution, offering massive torque and holding power in a size that is easier to integrate into the model. It gives pilots the ultimate authority and security needed for flying these large, powerful aircraft.
- In robotics, the BMS-990DMG is an excellent choice for projects that need a step up in power from standard servos. It is ideal for the main, load-bearing joints of a large and heavy robotic arm, for the steering on a robot weighing 50-100 pounds, or for any application where a standard servo would stall or fail under the load. It's a powerful and robust actuator for serious, large-scale robotics projects.
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