[kingpinda]

This was before patch as well.

The reason is that Because CEM is off. The plane at take off will start in Propellor pitch fine. To give most power for lift off. It will automatically switch to coarse while airborne. to give "top speed" ie using a automobile example: 5th gear in the air instead of 1st gear for takeoff.

Correct me if i'm wrong gentlemen, but I read some documents about planes that some should only use fine prop for take off and coarse during flight.

That may be why its the case that in the air its always coarse if the ai is handling this for you (CEM off)

some planes only have 2 settings. fine and coarse. some planes have increments of 1 percent.

Maybe its a bug maybe not. maybe they will implement something like need for speed that when your rpm falls to much it will return to fine or something.

The best way though is try and get used to CEM on! This way you can decide at what prop pitch you want to fly. you can start by disabling temperature and stuff but you may manually "shift gears" when you go in a dogfight or want to climb fast etc. these are cases you may want finer prop pitch. when you go cruise switch to coarse(r) or dive even.

edit: btw i havent tried latest patch yet but from what you tell me the most logical to me seems that it is the prop pitch switching. You will hear the proppellor noise switching from high pitch to lower pitch. If the prop pitch isnt changing please state that. It may be another issue.