Not beeing familiar with the twins, I realize I have to learn new things, now that the THE Baron is at hand. So could anyone please explain what Prop Sync does, when to use etc?Thank's

Prop sync matches the RPM of both propellers to reduce cabin noise and vibration. One engine acts as the master and the other engine automatically matches RPM to it. Some aircraft are equipped with a synchrophaser, which matches not only RPM but also the relative phase of the two propellers i.e. the position of one propeller's blades relative the other's. This provides even better noise and vibration reduction.Prop sync should be disabled during take off and landing, in case of synch system failure, and engaged during the remainder of the flight.In aircraft that are not prop sync equipped, the pilot can match RPM manually using the engine and propeller controls.

Thank's a lot :) Doesn't do a lot in the sim then I suppose, unless it affects the engine sounds ... but it's ok to be able to simulate procedures though.Btw, I've heard that experiments have been done with actual realtime recording of noise in larger aircraft cabins. The idea was to play it back to the cabin, but with reversed phase in order to phase out the live noise. Don't know if they succeed, but theoreticly it is possible. Try to connect two speakers with reversed phase and place them face to face. The sound almost disappears ...

I think De Havilland Canada have been using a system similar in concept in the Dash-8's for several years.http://www.q400.com/q400/en/quiet.jspAllcott

Ah, that's where I got it from. Wideroe has a lot of those hopping around here in Norway :) http://www.wideroe.no/cgwid/imgFolioPublic...03.jpg&img=&tt=