fsx-ms Crazy flip flop starting?

[rhodges 6]

With some aircraft, when the engine is started, the aircraft goes completely crazy flip flopping and wandering all over creation. It almost seems that the prop stays still and the aircraft rotates which may not actually be the case. Bill Lyons J3 Cub and the Commercial Level Simulations Arrow II would be examples. This is not a constant problem. Sometimes the aircraft will startup normally, but I have never been able to isolate the cause, or solution. Has anyone else seen this happen and have any idea what the correction might be?

 

Thanks:

RTH

[Portia911 9]

Had that experience a few times with one of the D18 packages (original by Milton Shupe). Seemed to happen if I hadn't flicked the mag switches before hitting the starter.

[rhodges 6]

Thanks     Portia911, will give it a try.

RTH