Pkitch, really does depend on the plane. Spitfires, Mustangs and other fighters can cope with 250-300/sec, whereas larger planes, Lancasters B17's etc need to be slowed down a little, say 200-250/sec. Also look at what the planes doing, if it's gunning it obviously the props will be going faster than if it is just coasting. The key really is to learn your planes.
Dean![]()