Futaba BLS174SV

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-08

Identity
Brand
Product Number	FUTM0138
Category	Hobby
Discontinued	Yes
Performance
Torque	7.4V 133.00 oz-in 6.6V 122.00 oz-in 6.0V 108.00 oz-in Below Average
Speed	7.4V 0.09 sec/60° 6.6V 0.10 sec/60° 6.0V 0.11 sec/60° Below Average
Physical
Weight	1.87 ozAverage
Dimensions	L 1.87 in W 1.063 in H 0.98 in
Drivetrain
Motor Type	Brushless
Gears	Metal
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Control System	SBUS2
Programmable	Yes
Electrical & Environment
Operating Voltage	6–7.4 V
Connectivity
Connector	Futaba J

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Below Average Stronger than 25% of 136 Digital Low Profile servos at 6.0V
Speed	Below Average Faster than 29% of 135 Digital Low Profile servos at 6.0V
Weight	Average Lighter than 41% of 251 Digital Low Profile servos

Performance Analysis

Shaft Power	1.82–2.73 W
Power Density	1.403 W/in³ More power-dense than 13% of 215 Digital Low Profile servos
Torque Density	2.0377 oz-in/g Stronger than 16% of 136 Digital Low Profile servos
Torque-to-Volume Ratio	55.44 oz-in/in³ Denser torque than 12% of 136 Digital Low Profile servos
Speed-to-Weight	0.17153 (1/sec·g) Faster than 25% of 135 Digital Low Profile servos
Speed-Torque Trade-off	11.88 Better balanced than 47% of 134 Digital Low Profile servos
Torque Gain per Volt	16.53%/V More voltage-responsive (torque) than 50% of 115 Digital Low Profile servos
Speed Gain per Volt	15.87%/V More voltage-responsive (speed) than 63% of 117 Digital Low Profile servos
Voltage Range Width	1.4 V Wider voltage range than 27% of 223 Digital Low Profile servos