REFLECTOR: Oil, P-factor and other things

[Laurence Coen]

David,

Bon Ami is a very fine polishing power that has been used to seat piston 
rings since almost as long as the internal combustion engine has existed.  I 
think the secret is that the particle size is less than 10 microns and won't 
hurt bearings.  Comet contains chlorine bleach.  That being said, one quart 
in 4 hours for a Lycoming 360 is normal.  That's what my experience with a 
Cherokee 180 would indicate and it went well over TBO.

If it pulls to the left on take off but not on taxi an offset thrust could 
be the culprit.  This is easy to fix with shims between the engine mount and 
the firewall.  Miss alignment of the main gear doesn't usually cause 
tracking problems but shows up as excess or uneven tire ware.

Larry Coen
N136LC

--------------------------------------------------
From: "David Ullman" <ullman at robustdecisions.com>
Sent: Saturday, February 23, 2013 8:40 AM
To: <reflector at tvbf.org>
Subject: REFLECTOR: Oil, P-factor and othe things

> I now have 80+ hours on my SEFG.  Still have a 50' paint job and the
> interior isn't finished.  When we first started flying we had handling
> problems and so the IO-360 C1C never got broken in correctly as we 
> couldn't
> do full power at first.  Thus, the rings are not seated so I use oil, a 
> lot
> of oil - a quart a tank (maybe I have a 2-cycle engine).  I am thinking of
> pulling the cylinders, honing and reringing.  Any thoughts?
>
> On take off my plane pulls to the left enough that I have to tap the right
> brake.  It is not very much so on taxi.  I don't seem to have brake drag 
> and
> I have tinkered with the toe in.  I though Canards did not have a P-factor
> and if so should be to the right.  IS this really a toe-in issue?  If so,
> which wheel is off.  I have tried 13 different ways of measuring toe in 
> and
> thought I was about right.  But??
>
> I just found that I broke an exhaust pipe.  The factory supplied system 
> had
> one piece for each cylinder, with the two pieces on each side slip fit
> together and projecting forward.  In order to get the 1-3 cylinder 
> assembly
> to fit in the cowl, I cut a Vee in them near the cylinder flange and had
> them rewelded.  I thought we normalized them, but this where the #3 pipe
> cracked.  My cowl does hit this pipe a little.  So I need to replace the
> pipe near the flange and fix the cowl clearance issue.  Anybody know what
> stainless steel this is and a source for it.  I will call the factory on
> Monday and see if they can aim me at the original vendor.
>
> In spite of the oil problem I did a lap around Mt. St Helens last week
> (found the broken exhaust on return).  See attached photos.  First one is
> looking west with the Olympics in the background and the second south with
> the dark, still warm part of the mountain in the lower part of the of the
> image.  I am at 9500 in these photos.
>
> David Ullman
> N444DX
> President EAA 292
> 541-754-3609
> david at davidullman.com
>



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