Mike, I noticed that also. I installed RCS original panel and the rpm does exceed 1800 and go to 2400. But on the panel that ships with this d/l, I also noticed about 1800 max. I even tried moving the prop levers manually in this panel..no change. In the air, prop rpm increases slightly, but not in the 2400-2800 range we're used to seeing on these engines. I remember with Dean's Recorder, the prop rpm on the ground was below 2000. In the air, it seemed to eventually get to normal. Not sure if this was modeled purposely or not..Airplane flies good though. Roy's original panel really looks authentic in this one. Caution, if you install his original panel, don't open the flight in windowed mode or you'll only see a black screen and a spinning cursor. Load in full screen and you will see a click box at the middle bottom of the page that then opens fsx window. I thought at first that FSX had crashed, it hadn't. It was waiting for the CLICK that I hadn't seen in windowed mode.. Great panel..Hope we find out about the props though.