Mailing List lml@lancaironline.net Message #66289
From: Steve Colwell <mcmess1919@yahoo.com>
Sender: <marv@lancaironline.net>
Subject: Potential Problem-Engine Vibration
Date: Thu, 25 Jul 2013 20:46:42 -0400
To: <lml@lancaironline.net>
I can find out from Bill Bainbridge of B&C at Airventure.  The shop he
recommended found a several built in problems with our Kelly rebuilt main
alt. when they balanced it.

Steve Colwell

-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Colyn
Case
Sent: Thursday, July 25, 2013 12:18 PM
To: Lancair Mailing List
Subject: [LML] Re: Potential Problem-Engine Vibration

So how do you get your alternator balanced?  non-aviation shops won't touch
them and aviation shops don't want to open them

On Jul 25, 2013, at 10:21 AM, Paul Miller wrote:

Ed Martin's legacy is smooth.  Mine has had a lot of annoying vibes as you
describe but virtually all have been removed with lots of cowling
interference fixes and plug change.  Many pilots forget the alternator can
be a wicked source of vibration and it is almost in the same plane as the
prop.

The problems I had originally were in that freq range and visible at the
wingtip also.

Paul

On 2013-07-25, at 9:54, Charles Brown <browncc1@verizon.net> wrote:


Has anyone definitely flown a vibration-free IO-550 Lancair (or TSIO-550)
with *any* propeller?  And by vibration-free, I mean it is free of
low-frequency 10-20Hz stuff, not the normal noise of flying.  What I'm
wondering is...  is it the 550, making such vibration with *any* propeller?

Charley Brown
Legacy RG  280hr



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