Blue Bird BMS-303DD

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-26

Identity
Brand
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 14.16 oz-in 4.8V 9.91 oz-in Average
Speed	6.0V 0.09 sec/60° 4.8V 0.11 sec/60° Above Average
Physical
Weight	0.13 ozAverage
Dimensions	L 0.75 in W 0.29 in H 0.61 in
Drivetrain
Motor Type	Coreless
Gears	Plastic
Gear Spline/Teeth	25 T estimate
Control & Signal
Modulation	Analog
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal) estimate

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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.

Compatible Hardware

Amazon eBay

*Spec is estimated from brand data.

Class Comparison

Torque	Average Stronger than 64% of 29 Analog Nano servos at 4.8V
Speed	Above Average Faster than 68% of 29 Analog Nano servos at 4.8V
Weight	Average Lighter than 61% of 67 Analog Nano servos

Performance Analysis

Shaft Power	0.17–0.29 W
Power Density	2.193 W/in³ More power-dense than 89% of 66 Analog Nano servos
Torque Density	2.6784 oz-in/g Stronger than 82% of 29 Analog Nano servos
Torque-to-Volume Ratio	74.69 oz-in/in³ Denser torque than 68% of 29 Analog Nano servos
Speed-to-Weight	2.45700 (1/sec·g) 5th-highest speed-to-weight of 29 Analog Nano servos
Speed-Torque Trade-off	1.09 Better balanced than 64% of 29 Analog Nano servos
Torque Gain per Volt	35.74%/V 2nd-highest torque gain per volt of 29 Blue Bird servos
Speed Gain per Volt	18.52%/V More voltage-responsive (speed) than 61% of 29 Blue Bird servos
Voltage Range Width	1.2 V Wider voltage range than 70% of 41 Analog Nano servos