Today's Message Index:
----------------------
1. 02:11 PM - Heat shieding ideas (Eddie Moran)
2. 04:17 PM - Re: Heat shieding ideas (Jake Singleton)
3. 05:42 PM - Re: Heat shieding ideas (Eddie Moran)
4. 09:10 PM - Re: Heat shieding ideas (Dan Horton)
Message 1
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| Subject: | Heat shieding ideas |
Hi, My exhaust stack is a tad too close to my fiberglass cowling on the bottom.
I see a future problem there. Yes I can cut a "little" off and still maintain
a good look, no, cant really move cowling too much......... but..........does
anyone have an idea of something I can put on the fiberglass there to keep
it cool? Metal? Some type of filler? Ideas?
I did a couple of high speed taxis today and could never get to max power due
to a 15kt. headwind that made the Moose want to get airborne at 2200 rpm.
Eddie Moran
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Message 2
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| Subject: | Heat shieding ideas |
Eddie-
Depending on the definition of "close" there are several options. I work
for a composite airframe manufacturer and we successfully dissipate heat by
the use of stainless steel sheet separated from the composite surface by a
layer of fiberfrax (refractory ceramic insulation). The shield stands about
3" from the surface of the composite once assembled, and extends beyond the
heat source to aid in heat dissipation. The sheet can be fastened or bonded
to the composite at the edges to secure the fiberfrax insulation. High temp
rtv works well to seal the edges if it is kept at a reasonable distance from
the heat source. Aircraft spruce carries it, and it is relatively
inexpensive.
If the cowl is really close, and can't afford to install thick shields,
perhaps a ceramic fire paint (google search "fire paint" or "fire free")
would provide the insulation needed. I am familiar with the use of Ocean
Fire Retardant #447 2-part epoxy, and it works quite well.
Cheers,
Jake Singleton
_____
From: owner-m14pengines-list-server@matronics.com
[mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of Eddie
Moran
Sent: Friday, May 11, 2007 2:11 PM
Subject: M14PEngines-List: Heat shieding ideas
Hi, My exhaust stack is a tad too close to my fiberglass cowling on the
bottom. I see a future problem there. Yes I can cut a "little" off and
still maintain a good look, no, cant really move cowling too much.........
but..........does anyone have an idea of something I can put on the
fiberglass there to keep it cool? Metal? Some type of filler? Ideas?
I did a couple of high speed taxis today and could never get to max power
due to a 15kt. headwind that made the Moose want to get airborne at 2200
rpm.
Eddie Moran
Message 3
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| Subject: | Heat shieding ideas |
Jake, thanks.
It is pretty close. I would estimate 1/4" or so. I will look into the ceramic
fire paint.
That might work better than the other option for two reasons. First the cowl
is "really close" and second...........I have no idea what you were talking about
in the first option.
Thanks again,
Eddie
Jake Singleton <singleberry@hotmail.com> wrote:
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w\:* {behavior:url(#default#VML);} shape {behavior:url(#default#VML);}
Eddie-
Depending on the definition of close there are several options. I work for
a composite airframe manufacturer and we successfully dissipate heat by the use
of stainless steel sheet separated from the composite surface by a layer of
fiberfrax (refractory ceramic insulation). The shield stands about .3 from the
surface of the composite once assembled, and extends beyond the heat source
to aid in heat dissipation. The sheet can be fastened or bonded to the composite
at the edges to secure the fiberfrax insulation. High temp rtv works well
to seal the edges if it is kept at a reasonable distance from the heat source.
Aircraft spruce carries it, and it is relatively inexpensive.
If the cowl is really close, and cant afford to install thick shields, perhaps
a ceramic fire paint (google search fire paint or fire free) would provide the
insulation needed. I am familiar with the use of Ocean Fire Retardant #447
2-part epoxy, and it works quite well.
Cheers,
Jake Singleton
---------------------------------
From: owner-m14pengines-list-server@matronics.com [mailto:owner-m14pengines-list-server@matronics.com] On Behalf Of Eddie Moran
Sent: Friday, May 11, 2007 2:11 PM
Subject: M14PEngines-List: Heat shieding ideas
Hi, My exhaust stack is a tad too close to my fiberglass cowling on the bottom.
I see a future problem there. Yes I can cut a "little" off and still maintain
a good look, no, cant really move cowling too much......... but..........does
anyone have an idea of something I can put on the fiberglass there to
keep it cool? Metal? Some type of filler? Ideas?
I did a couple of high speed taxis today and could never get to max power due
to a 15kt. headwind that made the Moose want to get airborne at 2200 rpm.
Eddie Moran
http://www.matronics.com/Navigator?M14PEngines-List
http://forums.matronics.com
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Message 4
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| Subject: | Re: Heat shieding ideas |
Eddie,
Go here:
http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1178942810-318-11
1&browse=engines&product=cowl_protector
Dan
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