Futaba S9151 Competition-Grade Digital Rudder Servo  [S9151]

Futaba S9151 Servo Digital Rudder
Price:
AUD$123.23
Brand:
Futaba
Model:
S9151
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Rudder Precision and Durability in the Futaba S9151

The Futaba S9151 digital servo is aimed at fixed-wing F3A pilots who demand steady, repeatable rudder control. It delivers the torque and speed balance needed for crisp manoeuvres while keeping weight and size compact.

Reliability and Smooth Operation

Inside the S9151, advanced digital control trims delays between stick input and response for a clean control feel. The coreless motor provides smooth, rapid motion and the dual ball bearings on the output reduce friction and enhance overall stability under continuous use.

Specifications

  • Dimensions: 41mm (L) x 20mm (W) x 38mm (H)
  • Weight: 50g
  • Speed: 0.19 sec/60° @ 4.8V
  • Torque: 132 oz/in (9.5 kg/cm) @ 4.8V
  • Power Supply: 4.8V (Not recommended for use with 6V)

For club and contest pilots wanting a dependable rudder servo, the Futaba S9151 combines a sturdy build with the responsiveness expected in serious pattern flying.

How do I centre the Futaba S9151 before fitting a horn?

Power the servo from your receiver, set trims to zero, then use a servo tester or transmitter to centre the output. Fit the horn where control surface is neutral for accurate throws.

Are there recommended link rod materials to pair with this servo?

Use rigid but lightweight pushrods, such as carbon or threaded aluminium, and ball links to reduce flex and maintain sharp control response.

Does the S9151 handle continuous high loads?

It is designed for high torque tasks, but avoid sustained stall conditions. Ensure linkages are free and trim throws are appropriate to prevent overheating.

What steps extend bearing life in this servo?

Protect the servo from dust and moisture, avoid side loads on the output horn, and inspect bearings periodically for wear or play.

Can I use the S9151 on other surfaces besides rudder?

Yes, where the size and torque match the control surface requirements. Confirm servo range and speed meet the application needs before swapping into other duties.

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