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Date: Thu, 15 Sep 2005 11:30:52 -0400
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From: "Lorn H. Olsen" <lorn@dynacomm.ws>
Subject: Re: airframe vibration

I get the grey streaks in the ailerons even though I am using the  
teflon hinges. My hinges are pretty loose. My mechanic and feel that  
they are OK for now but I inspect them in my preflight's.

My flaps and elevator use standard hinges. The flaps have never had  
streaks. The elevator has the streaks once in a while but is not loose.

Lorn

> From: Sky2high@aol.com
>
>> Scott, I assume you meant to say "I have(n't had) this problem  
>> since using......" unless things have changed since your previous  
>> discussion of the topic.
>>
>> Chris,
>>
>> Problems? That depends on the meaning of "problems."  The  
>> oversized hinges are terrific in that there is no looseness of or  
>> extra resistance in the control surfaces or flaps. On the other  
>> hand, I am experiencing "wear" on the outboard elevator hinges  
>> (especially the left) as evidenced by aluminum streaking trailing  
>> behind those hinges after several hours of cruise flight.
>
> Dirty air from the prop?  A harmonic from frame vibration?  And,  
> for a really technical description, excitation from an overly  
> wiggly tail?  I am just wondering if other small-tailed LNC2's have  
> seen this situation
>
> Scott Krueger AKA Grayhawk
> LNC2 IO 320 SB 89/96
--
Lorn H. 'Feathers' Olsen, MAA, DynaComm, Corp.
248-345-0500, mailto:lorn@dynacomm.ws
LNC2, O-320-D1F, 1,100 hrs, N31161, Y47, SE Michigan