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Blue Bird BMS-661MG+HS
Standard Discontinued

Blue Bird BMS-661MG+HS

Compatible Hardware

*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-07-28
Identity
Brand Blue Bird
Category Hobby
Discontinued Yes
Performance
Torque
6.0V 89.00 oz-in
4.8V 69.00 oz-in Average
Speed
6.0V 0.08 sec/60°
4.8V 0.10 sec/60° Top 10%
Physical
Weight 1.73 ozAverage
Dimensions L 1.594 in
W 0.787 in
H 1.516 in
Drivetrain
Gears Metal
Gear Spline/Teeth 25 T estimate
Rotation/Support Dual Bearings
Control & Signal
Modulation Analog
Rotational Range 120°
Pulse Cycle 125 ms
Neutral Position 1520 µs
Control System PWM
Electrical & Environment
Operating Voltage 4.8–6 V
Connectivity
Connector JR (Universal)

Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.

Class Comparison

TorqueAverage
Stronger than 41% of 192 Analog Standard servos at 4.8V
SpeedTop 10%
Faster than 100% of 190 Analog Standard servos at 4.8V
WeightAverage
Lighter than 48% of 448 Analog Standard servos

Performance Analysis

Shaft Power 1.28–2.06 W
Power Density1.082 W/in³
More power-dense than 83% of 437 Analog Standard servos
Torque Density1.4082 oz-in/g
Stronger than 39% of 192 Analog Standard servos
Torque-to-Volume Ratio36.28 oz-in/in³
Denser torque than 38% of 192 Analog Standard servos
Speed-to-Weight0.20408 (1/sec·g)
Faster than 96% of 190 Analog Standard servos
Speed-Torque Trade-off6.90
Better balanced than 5% of 190 Analog Standard servos
Torque Gain per Volt24.15%/V
More voltage-responsive (torque) than 90% of 145 Analog Standard servos
Speed Gain per Volt20.83%/V
More voltage-responsive (speed) than 79% of 147 Analog Standard servos
Voltage Range Width1.2 V
Wider voltage range than 74% of 229 Analog Standard servos

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