HPI Racing SS-40WP

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-09

Identity
Brand
Product Number	110650
Category	Hobby
Performance
Torque	6.0V 138.90 oz-in 4.8V 97.23 oz-in Below Average
Speed	6.0V 0.11 sec/60° 4.8V 0.13 sec/60° Average
Physical
Weight	2.12 ozAverage
Dimensions	L 1.646 in W 0.795 in H 1.496 in
Case Material	Plastic
Drivetrain
Gears	Metal
Gear Spline/Teeth	25 T
Control & Signal
Modulation	Digital
Rotational Range	120°
Electrical & Environment
Operating Voltage	4.8–6 V
Water Rating	Waterproof
Origin
Country of Origin	England

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Compatible Hardware

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*Based on known specs.

Class Comparison

Torque	Below Average Stronger than 18% of 1043 Digital Standard servos at 4.8V
Speed	Average Faster than 54% of 1041 Digital Standard servos at 4.8V
Weight	Average Lighter than 60% of 1902 Digital Standard servos

Performance Analysis

Shaft Power	1.38–2.33 W
Power Density	1.193 W/in³ More power-dense than 23% of 1759 Digital Standard servos
Torque Density	1.6205 oz-in/g Stronger than 13% of 1036 Digital Standard servos
Torque-to-Volume Ratio	49.67 oz-in/in³ Denser torque than 14% of 1042 Digital Standard servos
Speed-to-Weight	0.12821 (1/sec·g) Faster than 59% of 1033 Digital Standard servos
Speed-Torque Trade-off	12.64 Better balanced than 20% of 1031 Digital Standard servos
Torque Gain per Volt	35.71%/V More voltage-responsive (torque) than 97% of 850 Digital Standard servos
Speed Gain per Volt	15.17%/V More voltage-responsive (speed) than 48% of 871 Digital Standard servos
Voltage Range Width	1.2 V Wider voltage range than 10% of 1539 Digital Standard servos