Which isn't in this game Back on topic: Reducing RPM is night and day when you're gliding. The prop is a giant speed brake and will slow you down horribly when you have no power to spin it. By reducing the RPM you reduce drag by massive amounts. You can gain over 500fpm alt loss by gliding at full RPM, as compared to gliding with minimum RPM.Try it. It's a practical application in-game that will save you more times than now. I've glided down to the end of a runway and barely made it with low RPMs soooo many times. If I had left RPMs at full I would have ditched halfway there too many times to count.EDIT: P.S. Also leave RPM at full and chop throttle if you want to slow down in steep dives. If you want to accelerate in steep dives... well leave the throttle on! nyuck nyuck!