Product overview
The FlashHobby FH-D9257 Tail Servo provides digital actuation for RC aircraft. Its architecture combines plastic gears, a coreless motor, IC drive and potentiometer sensing in a nylon-plus-fiber case. PWM control has a specified value of 1520 μsec, with pulse travel of 800→2200 μsec. Operating travel is 120° ± 10°, and the separate limit angle is 180° ± 10°. The servo operates at 4.8–6.0 V and −10 to +50 °C, with a stated life exceeding 120,000 cycles. Rotation direction remains ambiguous in its specification.
Installation space is defined by detailed body dimensions of 36 × 15.2 × 28.8 mm and a 250 ± 5 mm connector lead made from 28 AWG PVC wire. Detailed weight is 25 ± 1 g without the servo horn. Brown is negative, red is positive, and yellow carries the designation “S Single.” The hardware is an individual servo component. Its configuration has material specification conflicts: overview dimensions are 35.5 × 15 × 28.6 mm, performance figures differ between overview and detailed entries, and bearing specifications alternate between two bearings and none.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity and purpose | FlashHobby FH-D9257 Tail Servo; digital tail servo for RC aircraft. |
| Control input | Pulse-width modulation control: 1520 μsec. |
| Operating voltage | 4.8–6.0 V. |
| Operating temperature | −10 to +50 °C. |
| Cycle life | More than 120,000 cycles. |
| Operating travel | 120° ± 10°. |
| Limit angle | 180° ± 10°. |
| Direction wording and pulse travel | Pulse travel: 800→2200 μsec. |
| Motor drive | IC drive. |
| Motor type | Coreless motor. |
| Position sensing | Potentiometer. |
| Signal processing | Digital control. |
| Detailed dimensions | 36 × 15.2 × 28.8 mm. |
| Detailed weight | 25 ± 1 g.Without servo horn. |
| Detailed maximum torque | 2 kg-cm at 4.8 V; 2.2 kg-cm at 6.0 V.Test voltages: 4.8 V and 6.0 V, respectively. |
| Detailed speed | 0.1 sec/60° at 4.8 V; 0.08 sec/60° at 6.0 V.No load; test voltages: 4.8 V and 6.0 V, respectively. |
| Detailed idle current | 120 mA at 4.8 V; 150 mA at 6.0 V.No load; test voltages: 4.8 V and 6.0 V, respectively. |
| Detailed running current | 800 mA at 4.8 V; 900 mA at 6.0 V.Under load; test voltages: 4.8 V and 6.0 V, respectively. |
| Deadband width | 5 μsec at both test voltages.Test voltages: 4.8 V and 6.0 V. |
| Overview bearing configuration | Two ball bearings. |
| Detailed bearing configuration | No ball bearings. |
| Gear material | Plastic gears. |
| Case material | Nylon plus fiber. |
| Connector wire length | 250 ± 5 mm. |
| Connector wire gauge and insulation | 28 AWG, PVC. |
| Wire Info (Brown) | Negative. |
| Wire Info (Red) | Positive. |
| Wire Info (Yellow) | S Single. |
| Overview dimensions and weight | 35.5 × 15 × 28.6 mm; 25 g. |
| Overview torque, speed and current | Stall torque: 4 kg-cm at 4.8 V and 4.5 kg-cm at 6 V. Operating speed: 0.08 sec/60° at 4.8 V and 0.07 sec/60° at 6 V. No-load current: 0.18 A at 4.8 V and 0.21 A at 6 V. Loaded current: 1 A at 4.8 V and 1.5 A at 6 V.At 4.8 V and 6 V, respectively; current values distinguish no-load and loaded operation. |
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