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Overview

The RUDD parameter group configures specific behaviors for the Rudder control axis on fixed-wing aircraft.

Key Concepts

1. Dual-Tail Gains (RUDD_DT_GAIN)

This parameter is specific to aircraft with Dual Tail (Twin Rudder) configurations. It allows for independent scaling of the rudder authority when the tails are acting together vs. opposing each other.

Developer Notes

  • Library: ArduPlane/servos.cpp.
  • See Also: RLL and PTCH for main flight control surfaces.

rudder differential thrust gain

RUDD_DT_GAIN: rudder differential thrust gain

Description

Gain control from rudder to differential thrust.

Values

  • Range: 0 to 100
  • Units: %
  • Increment: 1
  • Default: 10

Description

This parameter is used on twin-engine aircraft to assist with ground steering and yaw control using Differential Thrust.

  • How it works: When you move the rudder stick, the autopilot increases the RPM of one motor and decreases the other.
  • Usage: Set this to a non-zero value if you have motors assigned to ThrottleLeft and ThrottleRight.
  • Recommendation: Start with 10% and increase if the aircraft is sluggish to turn on the ground. Be careful with high values (>40%) as they can cause high-speed instability if one motor fails or responds differently.
View Source
Return to Launch Configuration (RTL) RUDDER Parameter Group