webra 160 - meticulously clean

Tue Oct 19 09:59:04 AKDT 2004

Let's see if I understand you correctly. Are you saying you added a new
piece of metal between the exhaust port and the header and then filed that
metal to the correct angle? Like an angled shim?

If so, what did you make the plate/shim out of? Also, did it go all the way
around the exhaust port?

Keith Black

----- Original Message ----- 
From: "Jim Ivey" <jivey61 at bellsouth.net>
To: <discussion at nsrca.org>
Sent: Tuesday, October 19, 2004 11:48 AM
Subject: Re: Re: webra 160 - meticulously clean

> Keith
>  I made a plate adapter,for my Webra 145, for the header to head and
beveled the adapter to the correct angle for clearance through the tunnel.
Just had to use longer screws. Works good, lasts long time.
>
> Jim Ivey
> >
> > From: "Keith Black" <tkeithb at comcast.net>
> > Date: 2004/10/19 Tue AM 11:39:47 EDT
> > To: <discussion at nsrca.org>
> > Subject: Re: webra 160 - meticulously clean
> >
> > Karl Mueller told me an interesting way to change the position (height
or side to side) of a header without bending the header itself. Sand the
flange to change the angle that the header
> > mounts up against the exhaust stack of the engine.
> >
> > I was able to use this approach to raise the output end of a header by
about 3/8" to clear my landing gear.
> >
> > Keith Black
> >
> >
> >   ----- Original Message ----- 
> >   From: Jim_Woodward at beaerospace.com
> >   To: discussion at nsrca.org
> >   Sent: Tuesday, October 19, 2004 9:40 AM
> >   Subject: RE: webra 160 - meticulously clean
> >
> >
> >
> >   Hi Tony,
> >
> >   I hope you are doing well in Phoenix.  I purchased and used the
Johnson header that Central sells and used it at the 23.5" dimension.  The
engine ran perfectly on the ground, but did not idle down in flight, or for
landing, like the 160 I have on the MACs setup (24.25" to first baffle).
This header broke within less than 10 flights.  The pipe portion broke
cleanly off around the weld joint.  In a bind (right before the Apopka
contest), I went to a marine store and had them re-weld the header.  After
the repair, the header broke again (6 or so flights), but this time about
1.0" above the weld. I then ordered the MACs header as I have used
previously on 1.45s and one 160.  Central hobbies was very gracious and
replaced the Johnson header with a Hatori steel header, which at this point
I have not used.  The Hatori is shorter than the Johnson header.
> >
> >   Then, the old and much used MACs header I had on the Lazuite broke!
Good thing I ordered two MACs headers.  At this point each MACs header has
been working fine.  Jim Ivey, Ken B., and I bent one of the MACs headers the
night before the Apopka contest in the hotel room by blocking the header in
certain positions and using a hammer ting it in place.  Actually, it doesn't
look that bad, fits perfectly, and definitely beats trying to use a torch to
heat up the header and then bend somehow (which we tried at first).
> >
> >   Thanks,
> >   Jim W.
> >
> >
> >
> >
> >        "Tony Quist" <quist23 at cox.net>
> >         Sent by: discussion-request at nsrca.org
> >         10/19/2004 10:21 AM
> >         Please respond to discussion
> >
> >
> >                 To:        <discussion at nsrca.org>
> >                 cc:
> >                 Subject:        RE: webra 160 - meticulously clean
> >
> >
> >
> >   Jim,
> >
> >
> >   Are you running the Johnson header that Central Hobbies sells?  If so
what length are you running it.  I saw that Matt K was running 24 inches to
the first baffle.  My header at full length only gives me 23.5 inches.
> >
> >
> >
> >   I have test run the engine and there are leaks where you say.  I will
rtv the areas and put hose clamps on the coupler.
> >
> >
> >
> >   Tony Quist
> >
> >
> >
> >   -----Original Message-----
> >   From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org] On Behalf Of
Jim_Woodward at beaerospace.com
> >   Sent: Tuesday, October 19, 2004 7:09 AM
> >   To: discussion at nsrca.org
> >   Subject: RE: webra 160 - meticulously clean
> >
> >
> >
> >
> >   I installed one headshim in the two Webra 160 (Aggressor and
Lazulite).  I did not notice any difference in running, nor a compression
reduction.
> >
> >   Also, I've gotten mine to be meticulously clean while running.  After
a day's flying, there is almost no need to clean the plane.  Simple, but
with some routine checks here are the steps:
> >   1.  Use RTV between the header and engine (check or redue once a month
if residue develops on plane)
> >   2.  Ensure all bolts are tight (no lie) (engine will still run with
loose headbolt)
> >   3.  Header & Pipe coupler:  I found zip ties to not adequately seal
the silicone coupler.  For instance, if you examine the plane and there is
exhuast residue on the plane before the stinger, then you have a leak
somewhere.  After installing small hose clamps, and checking every so often,
there is no "exhaust" residue before the actual exhaust stinger.
> >   4. Pinch or disconnect fuel line:   If you pinch the fuel line in
between flights, or just plug the line, there will be little to few fuel
drops exiting the carburetor while the plane is sitting.
> >   5.  Run exhaust stinger extension:
> >
> >   Thanks,
> >   Jim W.
> >
> >
> >
> >
> >            "Joe Lachowski" <jlachow at hotmail.com>
> >         Sent by: discussion-request at nsrca.org
> >         10/19/2004 09:52 AM
> >         Please respond to discussion
> >
> >                To:        discussion at nsrca.org
> >                cc:
> >                Subject:        RE: webra 160
> >
> >
> >
> >
> >
> >   Motor does not come with head shim. Got 3 motors that way. I haven't
had a
> >   need to use them either.
> >
> >   >From: "George Kolotouros" <georgeman4 at cox.net>
> >   >Reply-To: discussion at nsrca.org
> >   >To: <discussion at nsrca.org>
> >   >CC: "George Kolotouros" <georgeman4 at cox.net>
> >   >Subject: webra 160
> >   >Date: Mon, 18 Oct 2004 18:54:56 -0700
> >   >
> >   >Hello everyone, been having some problems with my new webra. I
finally have
> >   >the proper length on my es 160 pipe. 24in from plug to first
> >   >baffle. played with the mixture. Put it in the air. High speed is
lean
> >   >richened it a few % on my radio. Later when I got home I decided to
pull
> >   >the head to look at the top of the piston. Looks fine, found out I
dont
> >   >have a head gasket. There parts breakdown shows that ther is one.
What
> >   >gives? George Kolotouros
> >
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> >
> >
> >
> >
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