Crow-aware elevator trim

Last updated 19 Sept 2020


This Lua script is for sailplanes with crow brakes. It allows the pilot to optimise pitch trim quickly across the full range of crow, simply using the elevator trim.

Behind the scenes, the elevator trim is repurposed to bend the crow compensation curve. The process is completely transparent.

The script is compatible with all OpenTX transmitters, and all script settings are stored securely in an OpenTX curve. This makes it easy migrate to another transmitter, without losing your settings.

For more information, see "Crow-aware adaptive elevator trim" (blog post).


Current version: 3.1 (recommended). Supports all OpenTX transmitters, including Q X7, X-Lite, X9-Lite, X9D, X10/12, TX16S, TX12 and clones.

Ver Compatible with Setup Guide (PDF) All files (ZIP)
3.1 All tx's Download Download

Note 15 March 2021 - The file permissions of adptr3.lua were incorrectly set to 'read-only', preventing the script from running. This has now been fixed.

Older versions (deprecated)

Ver Compatible with Setup Guide (PDF) All files (ZIP)
2.2 X9D, X9DP, X9E Download Download
2.4 X10, X12, T16, TX16s Download Download