Yes... it can be REALLY irritating..

I have a twin engine boat, same issue... VERY annoying.. to me, and
many others..

Some don't seem to mind.. (?)

Not only the noise, but the vibrations , when out of sync, can be very
annoying as well...

Dave



On Mon, 21 May 2007 23:04:57 +0200, Mxsmanic
wrote:

I note that the Baron (and presumably other twins) has a prop sync switch that
somehow synchronizes the prop speeds on both engines. From recordings I've
heard of the interior noise of the aircraft, it does sound as though props
that are just slightly out of sync can produce a very irritating intermittent
noise as they move in and out of phase. Is it very bothersome in real life?
Also, how does the prop sync work? Does it actually move pitch or throttle
levers or something?