I have the mystery that the "BACK TO FLY" keybind in MSFS successfully teleports the LS8 (Asobo glider) and 172 (Asobo GA plane) instantly up in the air. But for the gliders I'm working on the planes are just being accelerated along the ground a little way. I've tried swapping every .cfg file in the SimObjects/Airplanes folder for one from a stock aircraft to narrow my problem down without success.
Could any clues be provided what aspect of the SimObject influences that BACK TO FLY behaviour? I think I could fix it if pointed approximately in the right direction. Thanks.