Futaba FU1K29401 2pcs Cross-Arm Servo Arm for S3108/S3110/S3111/S3114/S3154  [FU1K29401]

FUTABA D4MM SERVO HORN W CROSS-ARM 2PCS FOR S3108/S3110/S3111/S3114/S3154 (W/O PACKING & SCREW)
Price:
AUD$4.21
Brand:
Futaba
Model:
FU1K29401
Condition:
Brand New
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Cross-arm servo arm overview

The Futaba FU1K29401 cross-arm horn is offered as a two-piece replacement set for compatible Futaba servos, designed to provide a simple two-axis linkage point for steering and control rods. The wording highlights fit and functional use without implying any broader system upgrades.

Compatibility is confined to the Futaba models shown and the item does not include packaging or mounting screws, so obtain the correct fasteners before installation. The cross-arm layout is useful when changing linkage geometry to fine tune steering response and throw.

Use the horn for direct swap-outs or quick tuning experiments when you want to adjust endpoints, change leverage, or try alternative arm lengths on 1/10 scale RC platforms.

Compatibility

  • S3108
  • S3110
  • S3111
  • S3114
  • S3154

How can I use the cross-arm positions to change steering throw?

Moving the linkage connection between the orthogonal holes changes leverage and therefore throw; closer to the spline reduces throw while further out increases it. Small changes let you fine tune steering feel without altering servo endpoints.

Can this horn help adjust steering geometry like Ackermann?

While the horn itself only provides mounting points, changing attachment locations can alter tie rod lengths and indirect steering geometry; achieving specific Ackermann effects usually requires combined changes to rod layout.

Will fitting a metal cross-arm change servo loading?

A metal horn may slightly change weight and inertia at the spline, but any notable change in servo load is more likely caused by altered leverage or binding in the linkage rather than horn material alone.

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