Mailing List lml@lancaironline.net Message #58359
From: Mark Ravinski <mjrav@comcast.net>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: FW: LNC2 Vibration Issues
Date: Tue, 24 May 2011 13:23:22 -0400
To: <lml@lancaironline.net>
If you point the nose down and have the engine produce the same amount of power you will go much faster and changing vibrations might be suspected to be airspeed or airframe related.
However, I suspect that pointing the nose down does take some of the load off of the engine.
What does it do in a 700 fpm climb?
 
Mark Ravinski
----- Original Message -----
Sent: Monday, May 23, 2011 8:03 AM
Subject: [LML] Re: FW: LNC2 Vibration Issues



Folks,
 

I appreciate the great response from the LML list to my vibration problem.  I have checked everything that was mentioned in the emails.  Most people including myself suspect a tracking issue. But here is the rub:  On the ground the tracking appears to be perfect with the engine noyt running.  Now this is where it gets interesting, in cruise and level flight at 24"/2400RPM I can see some dither on my ASI and feel the vibration thorugh the airframe.  Now if I point the plane downhill at say 700fpm or more and the same power setting everything smoothes out! 

 

This to me suggests something in the prop tracking or engine mounting arrangement since right turning P factor is less with the nose below the horizon.  Any ideas?

 

Thanks

 

Tom

 

LNC2 50 hrs



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