HS-815BB Servo


The HS-815BB Mega sail arm servo comes with a Heavy Duty 4.9 inch arm commonly used for RC sailboats. With its dual ball bearing supported output shaft the HS-815BB will provide years of reliable service in larger sailboat applications.

How Far Will This Servo Rotate?

The answer to this question is partially dependent on what you are using to control the servo.
Click for a quick video explanation.

With an Average Radio System:
Your average transmitter and receiver will output a relatively narrow PWM signal range.

Radio System + Travel Tuner:
Adding a Servo Travel Tuner to your radio system setup will allow you to achieve wide PWM signal ranges.

Wide Signal Controllers:
Controllers such as the Servo Commander, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.

Tech Tips


Output Shaft Style D15T Spline
Voltage Range 4.8V - 6.0V
No-Load Speed (4.8V) 0.48sec/140°
No-Load Speed (6.0V) 0.38sec/140°
Stall Torque (4.8V) 274.96 oz-in (19.8 kg.cm)
Stall Torque (6.0V) 343.01 oz-in (24.7 kg.cm)
Max PWM Signal Range 920-2105μsec
Travel per µs .169°/μsec
Max Rotation 200°
Pulse Amplitude 3-5V
Operating Temperature -20°C to +60°C
Current Drain - idle (4.8V) 8mA
Current Drain - idle (6.0V) 8.7mA
Current Drain - no-load (4.8V) 700mA
Current Drain - no-load (6V) 830mA
Continuous Rotation Modifiable Yes
Direction w/ Increasing PWM Signal Clockwise
Deadband Width 8µs
Motor Type 3 Pole Ferrite
Feedback Style 5KΩ Potentiometer
Output Shaft Support Dual Ball Bearings
Gear Material Nylon
Wire Length 11.81" (300mm)
Weight 5.6 oz. (152g)
Wire Gauge 22AWG
Servo Size Large

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