@Stephan737 It turns out that we DO override the default conditions for the arming of the RTO mode. You found a bug in the way we do that, thank you!
The default RTO mode is armed when the thrust levers are > 0.5... so the default 737 will also trigger it when you reject the takeoff at 30 kts.
We override this to require a speed of > 90kts (I changed this to 88 now), but we ALSO required the thrust levers to be at < 0.2! This is the mistake, because when Nils or Tom coded this, they thought that "yeah, the lever needs to be near idle for RTO to trigger...". But we do not TRIGGER the RTO mode, we just ARM it. And to TRIGGER it, X-Plane want the levers to be at >0.5.
So effectively you have to "double pump" the thrust levers to get the RTO function on our model. Once back to "arm" the RTO, then forward and back to "trigger it".
I never noticed because on my tests because I also immediately used max reverse like I was trained - which overrides this system and triggers the RTO mode anyway.
This will be fixed in the next updat.
The secondary problem of "RTO triggering again when trying to taxi" can be avoided by not pushing the thrust levers past 0.5. If you heed the maximum N1 of 40% during taxiing, this should not happen. However I need to find out together with Tom how we can avoid the RTO mode to trigger again with the selector in OFF - it should not engage, regardless of the thrust lever angle used.
Cheers, Jan