Isolating

[Billy Matthews]

I have notice a slight buffeting on the right engine side:

The engine sound good:

The prop's sound like there in sync well the best i can get them: (Do they make a prop sync switch for the twinco?)

Mp is the same:

Everything looks good it's just a constant and slight movement it feel like a slight stopping and then going, I had another pilot go with me on a short trip he thought it might be the prop govenor, they were just overhauled.

Any Suggestions?

[steen]

Is this at all power and mixtures?
Off the cuff I would say clean the injectors as it takes very little dirt to cause what you describe when leaned in cruise, especially at
higher MP.
Steen

[Zach Grant L1011jock]

Billy,
If it is truly a miss, then if the props are synched it will jump out of synch at least for a cycle or two. I would bet that you are feeling simple vibration and airframe resonance. Start with new engine mount rubbers, and then have the engine/prop dynamically balanced. Also, play with different rpms and see if the problem follows, or goes away all together.
-Zach