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Reply-To: "kevin lane" <n3773@comcast.net>
From: "kevin lane" <n3773@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-767002@logan.com>
Subject: Re: [FlyRotary] Re: 20B exhaust (so far)
Date: Wed, 2 Mar 2005 13:56:32 -0800
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Todd - my first engine mounting plate had the exhaust even closer.  I bite 
the bullet and fabricated another one which moved the block forward 3/4", 
which also solved a water pump/fire wall clearance problem and the starter 
nose clearance too. I am getting pretty good at freehanding a router to 
machine the plates.  I even have pockets up front routered out for weight 
savings, all done free hand (just go 1/16th" at a time, and keep your mouth 
closed! chips go everywhere).
    Thanks for the info.  I have some welding curtain material I use for 
protection which seems to work well.  I wrapped my Lycoming starter in it 
since a cross over pipe comes close.
Kevin Lane  Portland, OR
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----- Original Message ----- 
From: "Bartrim, Todd" <Steve.Bartrim@canfor.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, March 02, 2005 11:58 AM
Subject: [FlyRotary] Re: 20B exhaust (so far)


Hi Kevin;
My exhaust didn't work out exactly as I'd envisioned it and as a
result the pipe is almost touching 2 of my mount struts where it passes
between them. I was quite concerned about heat damaging the mount, so I
kept a very close eye on this area. However it really hasn't been an
issue. The paint on the mount hasn't discoloured at all so I haven't
been too concerned, however I still check it often. When I first
received the EM2, I attached one of my spare CHT thermocouples to the
mount to monitor it and while I can't recall the temp, I know it was low
enough that I stopped worrying about it. I should've logged it.

Todd


this is a good point and I admit to have not thought it through yet.  I
have made two engine mount plates so far because the first one had the
exhaust almost touching the exhaust, maybe 1/8" clearance.  I will have
to come up with some type of shield however.  I hope, also, to introduce
some fresh air flow over them also.
Kevin Lane  Portland, OR

>
> I'm curious if you're planning some kind of heat shield for that mount

> strut that runs between the exhaust pipes... or maybe several layers
of
> exhaust tape... something to keep some of that heat away anyhow?
Looks
> scary to me, especially when you consider that those exhaust tubes
will
> likely be glowing red at full throttle.  Just a thought.
>
>  <Marv>


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