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Futaba BLS257
Mini Discontinued

Futaba BLS257

Compatible Hardware

*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-08
Identity
Brand Futaba
Product Number FUTM0527
Category Hobby
Discontinued Yes
Performance
Torque
6.0V 39.65 oz-in
4.8V 31.15 oz-in
Speed
6.0V 0.07 sec/60°
4.8V 0.08 sec/60°
Physical
Weight 0.99 ozAverage
Dimensions L 1.40 in
W 0.59 in
H 1.13 in
Drivetrain
Motor Type Brushless
Gears Plastic
Gear Spline/Teeth 21 T estimate
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Pulse Cycle 3.003 ms
Neutral Position 1500 µs
Refresh Rate 333 Hz
Connectivity
Wire Length 200 mm

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

WeightAverage
Lighter than 39% of 466 Digital Mini servos

Performance Analysis

Shaft Power 0.72–1.09 W
Power Density1.164 W/in³
More power-dense than 29% of 440 Digital Mini servos
Torque Density1.1125 oz-in/g
Torque-to-Volume Ratio33.37 oz-in/in³
Speed-to-Weight0.44924 (1/sec·g)
Speed-Torque Trade-off2.48

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Reviews (1)

  • YIR78

    December 14, 2012

    Application(s): tail servo t-rex 500

    Comments: T-rex 500, BLS 257 very good work tail servo, recomend

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