REFLECTOR: High-temp foam insulation

Sat Nov 6 12:37:11 CST 2004

Melamine foam pipe insulation looks even better - good to 350 degrees F
continuous.  See http://www.techlite.net/plain_79.htm

----- Original Message ----- 
From: "KeithHallsten" <KeithHallsten at quiknet.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Saturday, November 06, 2004 6:58 AM
Subject: REFLECTOR: High-temp foam insulation

> Of course the problem would be finding a practical source for a small
> quantity of foam-in-place polyisocyanurate.  I found a few companies that
> will machine whatever shapes you may want from such foam block, but no
> source for making your own!
>
> One thing I did notice is that the Elliot Company in Indianapolis makes
> polyisocyanurate pipe insulation with a continuous operating temperature
of
> up to 300 degrees F.  (see http://www.elliottfoam.com/pipe.html )  I've
been
> looking for some appropriate insulation for the line to the nose oil
cooler
> so that I can run it up the keel (fixed-gear, so there's room) without
> cooking everything in the cabin on hot summer days.  This looks like it
> might do it.  Has anyone run across anything better?
>
> Keith Hallsten
>
>
> ----- Original Message ----- 
> From: "Richard Riley" <richard at riley.net>
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Sent: Saturday, November 06, 2004 10:03 AM
> Subject: RE: REFLECTOR: Interesting Gotcha this morning
>
>
> > Foam polyisocyanurate would do
> > it.
http://www.findarticles.com/p/articles/mi_m0UBT/is_39_13/ai_55909848
> >
> > At 08:47 AM 11/6/04, you wrote:
> > >That's a good idea.  Do they make a non-flammable version of spray
> > >expand-a-foam?  Extra firewall protection.
> > >Is the spray foam even flammable?  I'd imagine yes.
> > >
> > >
> > >  Brian Michalk  <<http://www.michalk.com/>http://www.michalk.com>
> > >Life is what you make of it ... never wish you had done something.
> > >Aviator, experimental aircraft builder, motorcyclist, SCUBA diver
> > >musician, home-brewer, entrepreneur and barely single
> > >
> > >-----Original Message-----
> > >From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On
> > >Behalf Of robajohnson at comcast.net
> > >Sent: Friday, November 05, 2004 7:00 PM
> > >To: Velocity Aircraft Owners and Builders list
> > >Subject: Re: REFLECTOR: Interesting Gotcha this morning
> > >
> > >I had put a shot of spray foam in each duct on each end. Easy to get
out
> > >or punch through if you need to run something else through there but
> quick
> > >and eay way to keep the water and cold air out.
> > >
> > >Rob
> > >
> > >-------------- Original message --------------
> > >
> > > > After fixing the leak in my sump tank, I decided I would clean off
my
> > > > engine and reinstall my dip stick tube as it had become loose.
> > > >
> > > > I used the spray on engine degreaser and hosed it off afterwards. It
> took
> > > > two applications to get it really clean as the loose dip stick tube
> had
> > > > been leaking oil. Rinsed it down real good and let it sit for an
hour
> > > > before taxing back to the hanger from the wash rack.
> > > >
> > > > Fired her up this morning and taxied out to RW 13. About half the
way
> > > > there I started getting a pop corn sound in my headset! It was
pretty
> > > > loud. I turned the ANR off and on, no change. Tried EI or right mag,
> no
> > > > change. Changing the rpm did seem to increase the rate of popping
but
> not
> > > > as much as the rpm was changing. Turned off the intercom, slightly
> less
> > > > volume. Turned off the strobes, no change.. changed comm's the
quality
> of
> > > > pops changed but still there.
> > > >
> > > > All indications voltage and amperage looked within norm.
> > > >
> > > > I sadly taxied back to the hanger... Damn, and we were planning a
trip
> to
> > > > Mesa Verde tomorrow.....
> > > >
> > > > At the hanger I cycled electrical power and no change. Cycled
> again(I'm
> > > > stubborn) and it stopped!! Hmmm... Now thats good and
> > > > bad... Intermittents can be real buggers.. I could not get it to
come
> > > back.
> > > >
> > > > I got out , looked at the alternator wiring, as much as I can see
with
> out
> > > > de-cowling.. Popped the nose door and canard hatch. Nothing
obvious???
> > > >
> > > > My friend the local A&P/AI wandered by, he said he got worried as he
> heard
> > > > me taxi out but not take off. I told him the story and he didn't
have
> much
> > > > more to suggest, except that it may have been an external source,
some
> > > > local transformer or someth ing. that got my hopes up a bit, but not
> > > much...
> > > >
> > > > I decided to fire up and see if it would come back by taxing
> > > > around. pushed out of the hanger, "prop clear!" and started the
> > > > engine. He got this funny look on his face and gave me the kill
signal
> > > > while pointing back at the engine. I stopped it and bent out and
> looked
> > > > back. There was a puddle under the engine. I had not primed or ran
the
> aux
> > > > fuel pump.
> > > >
> > > > I jumped out and went back, stuck my finger in the liquid, smelled,
> > > > tasted, it was water?? Wow, it was coming out of he gap in the
cowling
> > > > where the vent and fuel whiffle valve lines are.
> > > >
> > > > It must be from washing the engine I said. Strange it didn't drain
> when
> > > > the cowling was off.. I went to the nose and lifted. Water gushed
> > > > out!!! Must have been 1/4 gallon or more!
> > > >
> > > > Then I realized there are gaps where the oil lines and wires go into
> the
> > > > two ducts on either side of the fuselage. In my quest to really
rinse
> down
> > > > the engine and firewall to insure I got all the degreaser out I had
> > > sprayed
> > > > a bunch of water into the ducts! Who knows how many BNC and other
> > > > connectors are in there getting soaked. Not to mention the main big
ol
> > > > wires for the starter/alternator. The shape of the fuselage is like
a
> > > > banana and any liquid put in the firewall end of the duct would
> migrate to
> > > > the center of the fusalage...
> > > >
> > > > In fact I had noticed one time after I had changed the oil and
really
> > > > bothched catching the oil from the filter, its mounted right above
the
> > > left
> > > > duct. The oil poured all over that spot. A couple weeks later I had
> the
> > > > back seat out and there was an oil stain where there is access to
the
> > > duct,
> > > > the pilled oil that got in the duct it had migrated up the duct to
the
> > > > middle of teh fusalage.
> > > >
> > > > I held the nose up for about 5 minutes until all dripp ing stopped.
> > > >
> > > > Fired up and flew around for half an hour with no popping noise. Now
I
> > > > don't know for sure if it was the water that caused the popping
noise,
> but
> > > > I do know I don't want to get that water in there again! It could
also
> > > > freeze and do who knows what?
> > > >
> > > > Scott
> > > >
> > > > "Those who sacrifice freedom to get security, deserve neither."
> > > > - Benjamin Franklin
> > > >
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>
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