Tuned pipes for dummies....feedback sought???

Wed Aug 18 14:36:32 AKDT 2004

In public, refer to it as mil spec MS20995  ...aircraft stainless steel
safety wire!

-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Fletcher, Richard
Sent: Wednesday, August 18, 2004 6:21 PM
To: 'discussion at nsrca.org'
Subject: RE: Tuned pipes for dummies....feedback sought???

<VBG!>  That's funny about bailing wire. I actually find it to be very
useful material. I should refer to it be a "kool" name, like "thin and
flexible metal attachment strapping material."

I don't know what temps the Pefa's run at but one loosened up in the
coupler, backed up and pressed against the back end of the lite ply canister
box and burnt a clean, round hole right through it! I was wondering why the
monokote at thee back of the fuse kept detaching, it was the prop blast into
the fuse!

I pulled the cans out after well over 100 flights and the "MacGyver gaskets"
have held up well, still in one piece! I imagine that these will last
forever on a glow setup as they run a lot cooler then gas. And they are much
smaller so generate less heat.

BTW, I saw all your posts I think last year on the SA list when you were
using ZDZ 40s and 80s but now I see you are back into pattern, which is
where I first noticed your name a number of years ago. So I guess you are
like me, you like all kinds of model planes!

Thanks, Rich

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Bob Pastorello
Sent: Wednesday, August 18, 2004 6:10 PM
To: discussion at nsrca.org
Subject: Re: Tuned pipes for dummies....feedback sought???

[we don't PUBLICLY acknowledge the use of "baling wire"] <vbg>

I'd always read that the Pefa cans ran very hot on 3W's...how much time is
on your "McGyver Gasket" ?

Bob Pastorello
rcaerobob at cox.net
www.rcaerobats.net

----- Original Message -----
From: "Fletcher, Richard" <Richard.Fletcher at gs.com>
To: <discussion at nsrca.org>
Sent: Wednesday, August 18, 2004 4:29 PM
Subject: RE: Tuned pipes for dummies....feedback sought???

> Hiya Bob!
>
>     Glad to be able to contribute one to you who has given all of us
> so
many
> good ideas. What happened was the Pefa canisters on my 3W 150 were
> running so hot that they burnt right through tie raps, neoprene
> O-rings and
silicon
> fuel tubing. So I had to figure something out. I went to a Pep Boys
> and found that the highest temperature rating on gasket material they
> carry is 350 so I bought a roll of it. Then I figured if I added the
> coating of orange RTV that it MAY do the job. In order to not distort
> or dent the
cans
> on the mount I also cut up tuna fish cans which is soft steel. So I
wrapped
> the home made gaskets and steel bands, about 1 1/2" wide, around the
> mounting points on the cans and then attached the cans to the plywood
> fuse mounts with pieces of baling wire. It has held up very well. I
> just fitted my big IMAC plane with pipes and used this gasket material
> in a similar mounting arrangement and so far so good.
>
>
>
> Thanks, Rich
>
>
>
>
> -----Original Message-----
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org]
On
> Behalf Of Bob Pastorello
> Sent: Wednesday, August 18, 2004 5:21 PM
> To: discussion at nsrca.org
> Subject: Re: Tuned pipes for dummies....feedback sought???
>
>
> That's a GREAT idea, Richard!!! NEVER even thought of a "make your
> own"....and for me, THAT is pretty amazing....thanks for sharing that
> one. It goes in my "tips" folder.
>
> Bob Pastorello
> rcaerobob at cox.net
> www.rcaerobats.net
>
>
> ----- Original Message -----
> From: "Fletcher, Richard" <Richard.Fletcher at gs.com>
> To: <discussion at nsrca.org>
> Sent: Wednesday, August 18, 2004 4:16 PM
> Subject: RE: Tuned pipes for dummies....feedback sought???
>
>
> > Best thing to do is to insulate the pipe from the mount and clamp or
> O-ring.
> > Best material I have found is high temperature RTV gasket material.
> > I make my own using automotive high temp gasket material rated at
> > 350 degrees and laminating high temp RTV onto it by placing two
> > parallel pieces of 1/8
> balsa
> > spaced about 4 inches apart on the automotive gasket material and
> > then squeegee on the RTV. I had to develop this technique for
> > mounting
> canisters
> > and pipes on my gas engines which run even hotter then 4S engines.
> >
> >
> >
> > Rich
> >
> >
> >
> > -----Original Message-----
> > From: discussion-request at nsrca.org
> > [mailto:discussion-request at nsrca.org]
> On
> > Behalf Of White, Chris
> > Sent: Wednesday, August 18, 2004 4:12 PM
> > To: discussion at nsrca.org
> > Subject: Tuned pipes for dummies....feedback sought???
> >
> >
> > help????
> >
> > I have a new Arresti III that will be using a YS 140 FZ and the new
> coupler
> > from Central with an (enclosed) ES carbon fiber pipe and the Hyde
> > ARIA mount. Merle Hyde says the pipe needs to be pretty flexible in
> > mounting to avoid header breakage. He also warns to tighten the hyde
> > mount screws aggressively.
> >
> > My thought was to mount a single clamp on the CG of the pipe with a
> > Dave Brown hush clamp pipe mount.  (O ring retention on a composite
> > clamp)
> I
> > have used this mounting style very successfully on a Greve pipe /
> > Webra
> 145
> > combo, but have questions about the durability based on what I hear
> > about pipe heat increase when running a 4 stroke.
> >
> > Can anyone tell me whether they have experience with the Dave Brown
mount
> > and four stroke pipes?   Do carbon fiber pipes get hotter than aluminum
> > ones???  How do you typically retain a carbon fiber pipe without
> > worrying about pipe distortion?
> >
> > Chris
> >
> >
> > -----Original Message-----
> > From: discussion-request at nsrca.org
> > [mailto:discussion-request at nsrca.org]On
> > Behalf Of Richard Strickland
> > Sent: Wednesday, August 18, 2004 2:36 PM
> > To: discussion at nsrca.org
> > Subject: Re: Dented pipe
> >
> >
> > Depends where they are.  If not too far in from the charge end, a
> > mandrel 8-18" OAL from 3/8" steel round with about a 15 degree kink
> > in it 2" from the(to be) rounded end or so clamped in a vise works
> > reasonably well for wheedling them out--kind of like the paintless
> > dent removal guys use.
> There
> > are also sheet metal suckers--but I'm not that familiar with them.
> > Or
> turn
> > the dent toward the fuse--dents do not affect performance
> > detectably.
> >
> > RS
> >
> > ----- Original Message -----
> > From: "Fletcher, Richard" <Richard.Fletcher at gs.com>
> > To: <discussion at nsrca.org>
> > Sent: Wednesday, August 18, 2004 12:53 PM
> > Subject: Dented pipe
> >
> >
> > > I just received my new OS 160 pipe and the gorillas at UPS were
> > > true to
> > form
> > > and stomped on it and it now has a couple of dents. Does anyone
> > > know how
> > to
> > > remove them?
> > >
> > >
> > >
> > > Thanks, Rich
> > >
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