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From: "Jack Ford" <jackoford@theofficenet.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>,
	"kevin lane" <n3773@comcast.net>
References: <list-767225@logan.com>
Subject: Re: [FlyRotary] Re: 20B exhaust (so far)
Date: Wed, 2 Mar 2005 14:24:12 -0800
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Hey Kevin,

What kind of bit are you using in that router? How deep can you cut
(Aluninum, I assume)?

Sounds like a poor man's end mill.

Jack Ford


----- Original Message ----- 
From: "kevin lane" <n3773@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, March 02, 2005 1:56 PM
Subject: [FlyRotary] Re: 20B exhaust (so far)


> 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
> e-mail-> n3773@comcast.net
> web-> http://home.comcast.net/~n3773
> (browse w/ internet explorer)
> ----- 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>
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>