the HSI on the Mooney Bravo does not turn properly when the aircraft is turning in slew mode. The HSI turns at a much slower rate than the actual turning of the aircraft resulting in an erroneous reading on the heading when switching back from slew to normal. The only way to reset the HSI after exiting slew mode is to reselect the aircraft from the menu. Try it and see.John

The other simple fix is don't slew - it breaks normality in the first place!Gary

How true! However, I only use slew to positon my aircraft on the ground for a good starting position (parking spot) and then save the flight for future use. I don't like the default parking spots.

On many aircraft synchronising the HSI is a manual operation as part of the pre-flight and startup. You'd be amazed how many thing in FS you take for granted are actually an OVER-simplification of the real thing.;)Allcott

Have you got your engine running and avionics switched on before you slew? I noticed in FS9 that I would get this problem if I slewed the aircraft before firing up the donk and switching the avionics on. You could always taxi the aircraft to your chosen spot and direction then switch the donk and electrics off before saving.Bon Voyage

Thanks for the input. I believe that most of the time the engine/avionics are off before I slew. I appreciate your help!