OK Pete, I have more information. The keyboard makes no difference. Apparently, at least on my end, it's the KingAir that's at issue. The smallest touch of the keyboard of the throttle on the yoke sets the plane off at a high rate. So high that I end up skidding all over the tarmac when I execute any turns, etc. I've even crashed a few times from tipping over onto a wing. I found that I can offset it a bit by feathering but even that is touchy. I would assume that as I feather, the prop blades move in degrees but no setting there appears to be right either. Either the plane is going along too fast or, it comes under control for a bit but then the plane comes to a slow stop requiring me to push the feather control back to where the plane goes into high gear again.