A popular servo for smaller airplanes, heli’s, boats, cars and trucks, the HS-81 offers a fine balance between speed and torque.
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:
91°
Your average transmitter and receiver will output a relatively narrow PWM signal range.
Radio System + Travel Tuner:
165°
Adding a Servo Travel Tuner to your radio system setup will allow you to achieve wide PWM signal ranges.
Wide Signal Controllers:
165°
Controllers such as the Servo Commander, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.
| Output Shaft Style | C24T Spline |
|---|---|
| Voltage Range | 4.8V - 6.0V |
| No-Load Speed (4.8V) | 0.11sec/60° |
| No-Load Speed (6.0V) | 0.09sec/60° |
| Stall Torque (4.8V) | 36.10 oz-in (2.6 kg.cm) |
| Stall Torque (6.0V) | 41.66 oz-in (3 kg.cm) |
| Max PWM Signal Range | 640-2250μsec |
| Travel per µs | .102°/μsec |
| Max Rotation | 165° |
| Pulse Amplitude | 3-5V |
| Operating Temperature | -20°C to +60°C |
| Current Drain - idle (4.8V) | 8.8mA |
| Current Drain - idle (6.0V) | 9.1mA |
| Current Drain - no-load (4.8V) | 220mA |
| Current Drain - no-load (6V) | 280mA |
| Continuous Rotation Modifiable | No |
| Direction w/ Increasing PWM Signal | Clockwise |
| Deadband Width | 8µs |
| Motor Type | 3 Pole Ferrite Motor |
| Feedback Style | 5KΩ Potentiometer |
| Output Shaft Support | Outer case serves as bearing |
| Gear Material | Nylon |
| Wire Length | 6.29" (160mm) |
| Weight | 0.58oz (16.6g) |
| Wire Gauge | 28AWG |
| Servo Size | Micro |