I was just flying the P51 included in FSX and I noticed that it is very slow and very hard to maneuver. I can only get a top speed of about 100 mph even though the real P-51 has a top speed of 436mph. I also felt as if I was always just above a stall. The aircraft is hard to turn and hard to fly straight. Does anyone else know about these issues and do you know how to fix them?