Futaba S3101 Micro Servo S3101 - Precision for Lightweight Models  [S3101]

Futaba S3101 Servo Micro Precision
Price:
£33.29
Brand:
Futaba
Model:
S3101
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Micro-sized precision servo for lightweight airframes

The Futaba S3101 Micro Precision servo is a compact RC-scale servo intended for use in small electric aircraft and other lightweight models where size and weight are limiting factors. It replaces earlier micro units and is packaged with common mounting hardware and multiple servo horns to fit typical micro-linkage setups.

This servo uses nylon gearing, a 3-pole motor and an oilite bushing for basic bearing support, so installation should consider torque demands and the battery system's ability to supply current. When installing in battery-powered models, verify your NiMH or LiPo pack and regulator can provide the necessary peak amps without voltage sag to avoid unintended behavior.

For control and tuning: mount the servo with the included grommets and screws, select the horn that provides the required throw and leverage, and adjust endpoints and subtrim in your transmitter to prevent binding. The S3101 is suitable for small control surfaces such as ailerons, rudders and elevator trim surfaces where compact size and reasonable responsiveness are required.

Packing includes

  • One S3101 micro servo with pre-installed "x" servo horn
  • Two brass eyelets
  • Two black round rubber grommets
  • Two servo mount screws
  • Two servo horns (1 round, 1 "X" and 1 straight)

Specifications

  • Item: Futaba S3101 Micro Precision servo
  • Model Number: S3101
  • Material: Nylon gears, 3-pole motor, oilite bushing
  • Speed: 0.18 sec/60° @ 4.8V, 0.14 sec/60° @ 6V
  • Torque: 35 oz·in @ 4.8V, 43 oz·in @ 6V (2.5 kg·cm @ 4.8V, 3.1 kg·cm @ 6V)
  • Dimensions: Length 1.1" (28 mm), Width 0.5" (13 mm), Height 1.2" (30 mm)
  • Weight: 0.6 oz (17 grams)
  • Connector: "J" type with about 5" wire
  • Included: pre-installed X horn plus additional horns and mounting hardware as listed above

The S3101 is well suited to tiny airframes and light RC models where compact actuation is needed; ensure correct power and transmitter setup for dependable control.

Micro foam planes, park flyers and small-scale gliders typically match the servo's torque and dimensions. Verify the internal bay fits the stated length, width and height before committing to installation.
The "J" type connector is common, but check pinouts and polarity for the receiver brand in use. Adapter leads are available if pin ordering differs between manufacturers.
Measure the mounting footprint and case dimensions to confirm fit; supplied grommets and screws match common micro servo mounts, but exact clearance should be checked before installation.
The horns are intended for Futaba-style splines. They may not seat correctly on different spline standards and could lead to poor fit or damage if forced.
For warranty claims consult your dealer and Futaba's regional support; have proof of purchase ready and follow the specified return procedures for evaluation.

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