# Ground Cue

## Overview

The Ground Cue provides specialized motion cueing optimized for ground operations in aircraft simulations. It works in conjunction with the Primary Cue, automatically transitioning between ground-based and airborne motion profiles based on the aircraft's altitude.

Key features:

* Dedicated motion profile for ground operations (taxi, takeoff, landing)
* Smooth transition between ground and air motion profiles
* Configurable altitude-based blending
* Aircraft-specific (not active for other vehicle types)
* Requires valid altitude telemetry data from simulation

<figure><img src="/files/zpFKbacommVp0iGTRJvm" alt=""><figcaption></figcaption></figure>

## Controls

### Altitude Settings

* **Ground Altitude**: Set this to match the reported altitude when aircraft is on the ground
  * Check "Source Data" display while on runway to determine correct value
  * Some simulators report non-zero altitudes for ground level
* **Air Altitude**: Defines height at which Primary Cue takes full control
  * Motion smoothly transitions between Ground/Primary profiles between these altitudes

### Axis Controls

Each motion axis has identical controls to the Primary Cue:

* **Enable/Disable**: Toggle individual axis activity
* **Link to Primary**: Inherit settings from Primary Cue profile
* **Isolate**: Temporarily disable all other axes for focused tuning
* **Smoothness**: Filter strength
* **Washout**: Return-to-center speed
* **Gain**: Motion intensity multiplier

## Tuning Tips

### Initial Setup

1. Set Ground Altitude first:
   * Park aircraft on runway
   * Check Source Data altitude reading
   * Set Ground Altitude to match
2. Set Air Altitude:
   * Recommended 10-50m above Ground Altitude
   * Larger difference = more gradual transition
   * Smaller difference = quicker transition

### Ground Profile Tuning

1. Start with Primary Cue settings
2. Modify for ground operations:
   * Reduce gains for smoother taxi
   * Increase smoothness to dampen runway bumps
   * Adjust washout for better brake/acceleration feel

### Testing

1. Test full takeoff sequence:
   * Ground handling
   * Rotation
   * Initial climb
2. Verify smooth transition to Primary Cue
3. Test landing sequence:
   * Approach
   * Touchdown
   * Rollout

### Common Adjustments

* **Rough Ground Handling**: Increase smoothness, reduce gains
* **Weak Brake Feel**: Increase surge axis gain
* **Harsh Touchdown**: Adjust heave axis smoothness
* **Poor Directional Feel**: Fine-tune yaw/sway settings

Remember: Changes take effect in real-time, allowing immediate feedback during tuning.


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