Servo Specs, Reviews, & Comparison Tool
Blue Bird BMS-661MG+HS - Super Fast Standard Servo
Specifications
| Last Updated: | 2025-08-04 |
| Modulation: | Analog |
| Torque: |
4.8V: 69.00 oz-in (4.97 kg-cm) 6.0V: 89.00 oz-in (6.41 kg-cm) |
| Speed: |
4.8V: 0.10 sec/60° 6.0V: 0.08 sec/60° |
| Weight: | 1.73 oz (49.0 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: | Metal |
| Rotation/Support: | Dual Bearings |
| Rotational Range: | 120° |
| Pulse Cycle: | (add) |
| Pulse Width: | (add) |
| Connector Type: | (add) |
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Notes
- The discontinued Blue Bird BMS-661MG+HS is an elite, high-voltage (HV) digital brushless servo, representing the absolute pinnacle of standard-size servo technology. It combines a hyper-efficient and long-lasting brushless motor with a precise digital controller, a heavy-duty metal gear (MG) train, and high-speed (+HS) tuning. It is designed for the most critical and demanding applications where performance, reliability, and longevity are paramount. This is the servo of choice for professional competition pilots flying giant-scale aerobatic aircraft, top-level 1/8 scale off-road racers, and pilots of large turbine jets.
- The brushless motor is what sets the BMS-661MG+HS in a class of its own. Compared to brushed motors, it offers significantly more power, faster response, lower operating temperatures, and a lifespan that is orders of magnitude longer. This means the servo's phenomenal performance does not degrade over time. For a competitive pilot, this consistency is priceless. They can rely on the servo to feel the same on its hundredth flight as it did on its first. The HV capability further unlocks its potential, delivering a truly breathtaking level of speed and torque.
- For industrial automation and advanced robotics, the BMS-661MG+HS is a mission-critical component. Its incredibly long operational life makes it ideal for robotic systems that must run 24/7 with minimal maintenance, such as on a factory assembly line. Its efficiency is a major benefit for battery-powered autonomous systems. Its immense power and precision make it suitable for the most challenging tasks, from research-grade robotic manipulators to the flight control actuators on large, professional unmanned aerial vehicles (UAVs). It is an investment in ultimate performance and reliability.
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