Crow-aware elevator trim

Description

This Lua script is for gliders with crow brakes. It repurposes the elevator trim so that instead of applying a variable offset, it bends the crow compensation curve, allowing trim to be optimised across the full range of crow.

In use, the script is completely transparent - apply some crow and click the trimmer as required and the script will adjust the appropriate curve point(s) automatically. This means you can achieve perfect crow trim across the full range of crow, even before the first landing of a new model.

The script runs on any OpenTX or EdgeTX transmitter. The compensation curve and script configuration are both stored with the model, making it safe to transfer setups between different transmitters without the need to retrim.

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

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