Robbe FS-300

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*Based on known specs.

Technical Specifications

Last Updated: 2026-07-28

Identity
Brand
Product Number	9101
Category	Hobby
Performance
Torque	6.0V 50.70 oz-in 4.8V 42.36 oz-in Bottom 10%
Speed	6.0V 0.10 sec/60° 4.8V 0.12 sec/60° Average
Physical
Weight	0.94 ozTop 10%
Dimensions	L 1.417 in W 0.591 in H 1.276 in
Drivetrain
Gears	Metal
Gear Spline/Teeth	25 T
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal) estimate
Origin
Country of Origin	German

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Bottom 10% Stronger than 1% of 1043 Digital Standard servos at 4.8V
Speed	Average Faster than 62% of 1041 Digital Standard servos at 4.8V
Weight	Top 10% Lighter than 99% of 1902 Digital Standard servos

Performance Analysis

Shaft Power	0.65–0.94 W
Power Density	0.877 W/in³ More power-dense than 15% of 1759 Digital Standard servos
Torque Density	1.5895 oz-in/g Stronger than 12% of 1036 Digital Standard servos
Torque-to-Volume Ratio	39.64 oz-in/in³ Denser torque than 9% of 1042 Digital Standard servos
Speed-to-Weight	0.31270 (1/sec·g) Faster than 96% of 1033 Digital Standard servos
Speed-Torque Trade-off	5.08 Better balanced than 7% of 1031 Digital Standard servos
Torque Gain per Volt	16.41%/V More voltage-responsive (torque) than 56% of 850 Digital Standard servos
Speed Gain per Volt	16.67%/V More voltage-responsive (speed) than 57% of 871 Digital Standard servos
Voltage Range Width	1.2 V Wider voltage range than 11% of 1539 Digital Standard servos