KO Propo RSx3-Response

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Product Number	30123
Category	Hobby
Discontinued	Yes
Performance
Torque	7.4V 244.46 oz-in 6.0V 201.41 oz-in Average
Speed	7.4V 0.06 sec/60° 6.0V 0.07 sec/60° Top 10%
Physical
Weight	2.31 ozBelow Average
Dimensions	L 1.614 in W 0.787 in H 1.496 in
Case Material	Aluminum
Drivetrain
Motor Type	Coreless
Gears	Aluminum
Gear Spline/Teeth	23 T estimate
Rotation/Support	Dual Bearings
Control & Signal
Control System	HCS / PWM
Programmable	Yes
Electrical & Environment
Operating Voltage	6–7.4 V
Power Source	LiPo / LiFe / Ni-MH
Origin
Country of Origin	Japan

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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 54% of 1294 Standard servos at 6.0V
Speed	Top 10% Faster than 91% of 1290 Standard servos at 6.0V
Weight	Below Average Lighter than 34% of 2538 Standard servos

Performance Analysis

Shaft Power	5.32–7.53 W
Power Density	3.964 W/in³ 5th-highest power density of 112 KO Propo servos
Torque Density	3.0750 oz-in/g Stronger than 41% of 38 KO Propo servos
Torque-to-Volume Ratio	105.99 oz-in/in³ Denser torque than 35% of 38 KO Propo servos
Speed-to-Weight	0.21810 (1/sec·g) Faster than 76% of 38 KO Propo servos
Speed-Torque Trade-off	14.10 Better balanced than 46% of 38 KO Propo servos
Torque Gain per Volt	15.27%/V More voltage-responsive (torque) than 57% of 29 KO Propo servos
Speed Gain per Volt	11.91%/V More voltage-responsive (speed) than 50% of 29 KO Propo servos
Voltage Range Width	1.4 V Wider voltage range than 65% of 38 KO Propo servos