MC carb for Webra
Brian Billings
auto7832 at bellsouth.net
Thu Jun 5 07:55:37 AKDT 2003
I got the measurements from the piedmont website, I was reluctant to move
because I assumed the was the tested proven set up. How much do you think I
should shorten it.
----- Original Message -----
From: "Jerry Budd" <jbudd at QNET.COM>
To: <discussion at nsrca.org>
Sent: Thursday, June 05, 2003 11:25 AM
Subject: Re: MC carb for Webra
> Brian,
>
> According to the Piedmont website the baffle is 4" ahead of the aft
> end of the pipe so that puts you at ~27.5" from plug to baffle. When
> I tried the Greve pipe that Piedmont sells, I found that to be too
> long (way down in power compared to my ES pipe at ~24" plug to
> baffle).
>
> Lee, Jim W., Matt - Are these needle settings close? I haven't run
> the ProMixII carb in a while.
>
> It sounds to me like the pipe may need to be shortened some, and the
> low end richened up a bit. You also probably got the motor a bit hot
> when the pump got FOD'd and that's why the internals are a bit dark.
>
> Jerry
>
> >That is from the center of the glow plug to the end of the large portion
of
> >the pipe, does not include the stinger. Not sure where the first baffle
is
> >located at.
> >----- Original Message -----
> >From: "Jerry Budd" <jbudd at QNET.COM>
> >To: <discussion at nsrca.org>
> >Sent: Thursday, June 05, 2003 10:09 AM
> >Subject: Re: MC carb for Webra
> >
> >
> >> Brian,
> >>
> >> The 31.5" pipe length you quote, what is that from? In other words
> >> what is the distance from the plug to the first baffle in the pipe?
> >>
> >> Jerry
> >>
> >> > Jerry, my setup is as follows: Webra 145 red head, greve pipe at
> >31.5",
> >> >os typeF plug, cool power 15%, APC 17*12, 10lb. 2oz. Prophecy.
Current
> >> >settings on engine are 1 turn on high speed needle, 1 1/16 on low
speed
> >> >needle. I am guessing low 8k for top end rpm on the ground slightly
rich
> >> >{have not tached the 17*12 but I was getting high 8600 or so with
17*10.
> >> >Engine starts good and idles reliably but transition is not very
> >linerier.
> >> >In flight it sounds good with straight and level flight at a little
less
> >> >than half throttle, when pulling to a 45 up line it sags momentarily
but
> >> >recovers, on tall verticals or loops it will sag toward the top and
loose
> >> >roughly 1\2 of it's rpm and that is with me adding throttle through
the
> >> >maneuver, engine with not regain good power unless you go to at least
3\4
> >or
> >> >better with throttle. I get no smoke trail out of engine until full
> >throttle
> >> >and oil out of the pipe is pretty dark but not black, top third of
piston
> >> >and ring is black like cyl. temps have been high. Condition is better
> >with
> >> >low speed needle set richer but it's easy to flood on start ups and
is
> >hard
> >> >to keep running when cold {must keep a very fast Idle speed until
your in
> >> >the air}. I have found trash in the pump and pump screws came loose
> >twice,
> >> >last week I pulled pump apart again and no trash was found but screws
> >where
> >> >loose, I cleaned all parts in warm water and dish soap, removed tank
and
> >> >cleaned, ran large fuel tubing from clunk to carb. All fuel is
filtered
> >from
> >> >the jug and I have a filter between tank and pump. That is about all
I
> >can
> >> >think of, any suggestions would be greatly appreciated.
> >> >----- Original Message -----
> >> >From: "Jerry Budd" <jbudd at QNET.COM>
> >> >To: <discussion at nsrca.org>
> >> >Sent: Thursday, June 05, 2003 12:32 AM
> >> >Subject: Re: MC carb for Webra
> >> >
> >> >
> >> >> Hi Brian,
> >> >>
> >> >> What's your setup? i.e. pipe & length, plug, prop, fuel, airplane
> >> >> (including weight), rpm's, etc.
> >> >>
> >> >> The reason I'm asking is I've got quite a bit of experience with
the
> >> >> Webra's (including the MC carb) and I may be able to suggest some
> >> >> work arounds until the MC is available again via Horizon (I'm
> >> >> guessing but they probably underestimated the demand for the carb
and
> >> >> got caught short on stock).
> >> >>
> >> >> Jerry
> >> >>
> >> >> >Sounds interesting Jim, let me know how it works out. Mine is
> >> >> >driving me crazy, I have it running ok right now but it is kind
of
> >> >> >off and on type of power. I have been flying her but I know it is
> >> >> >not right, still managed to get a gallon through it sunday with
easy
> >> >> >starts good reliability but as far as uplines go it is either all
or
> >> >> >nothing, no middle.
> >> >> >
> >> >> >----- Original Message -----
> >> >> >From: <mailto:jivey61 at msn.com>jim ivey
> >> >> >To: <mailto:discussion at nsrca.org>discussion
> > > >> >Sent: Wednesday, June 04, 2003 10:30 PM
> >> >> >Subject: Re: MC carb for Webra
> >> >> >
> >> >> >Brian
> >> >> >I put a cline regulator, a regular back plate with a press. tap,
and
> >> >> >pressurized the tank on my Webra. The ground runs have been more
> >> >> >stable for throttle position The needles are a lot less sensitive
> >> >> >and it doesn't seem to be fat in the middle.
> >> >> >When I find some time to fly I think it will finally run good. I
> >> >> >must have had a pump problem because too many people are running
> >> >> >this engine. I did find a piece of foreign material in the pump.
> >> >> >This was in the pump from day one. I used a YS filter and nuttin'
> >> >> >gets through a YS filter.
> >> >> >Will let you know when I fly it, how it does.
> >> >> >
> >> >> >Jim Ivey
> >> >> >
> >> >> >
> >> >> >----- Original Message -----
> >> >> >From: Brian Billings
> >> >> >Sent: Wednesday, June 04, 2003 2:10 PM
> >> >> >To: discussion at nsrca.org
> >> >> >Subject: Re: MC carb for Webra
> >> >> >
> >> >> >Thanks Tony, that is what I thought.
> >> >> >
> >> >> >----- Original Message -----
> >> >> >From: <mailto:tony at radiosouthrc.com>Tony Stillman
> >> >> >To: <mailto:discussion at nsrca.org>discussion at nsrca.org
> >> >> >Sent: Wednesday, June 04, 2003 9:45 AM
> >> >> >Subject: Re: MC carb for Webra
> >> > > >
> >> >> >Brian:
> >> >> >
> >> >> >Horizon is the USA importer for Webra, so if they are out, you
> >> >> >probably won't find one. The only other answer is to go direct
to
> >> >> >Webra in Europe.
> >> >> >
> >> >> >Tony Stillman
> >> >> >Radio South
> >> >> >3702 N. Pace Blvd.
> >> >> >Pensacola, FL 32505
> >> >> >1-800-962-7802
> >> >> ><http://www.radiosouthrc.com/>www.radiosouthrc.com
> >> >> >
> >> >> >----- Original Message -----
> >> >> >From: <mailto:auto7832 at bellsouth.net>Brian Billings
> >> >> >To: <mailto:discussion at nsrca.org>discussion at nsrca.org
> >> >> >Sent: Tuesday, June 03, 2003 8:29 PM
> >> >> >Subject: MC carb for Webra
> >> >> >
> >> >> >Does anyone know where I can buy the Webra MC carb, Horizon shows
> >> >> >them on their website but they don't have any in stock and where
> >> >> >unable to tell me when they would. Thanks in advance
> >> >> >
> >> >> >Brian Billings
> >> >>
> >> >>
> >> >> --
> >> >> ___________
> >> >> Jerry Budd
> >> >> mailto:jbudd at qnet.com
> >> >> =====================================
> >> >> # To be removed from this list, send a message to
> >> >> # discussion-request at nsrca.org
> >> >> # and put leave discussion on the first line of the body.
> >> >> #
> >> >>
> >> >
> >> >
> >> >=====================================
> >> ># To be removed from this list, send a message to
> >> ># discussion-request at nsrca.org
> >> ># and put leave discussion on the first line of the body.
> >> >#
> >>
> >>
> >> --
> >> ___________
> >> Jerry Budd
> >> mailto:jbudd at qnet.com
> >> =====================================
> >> # To be removed from this list, send a message to
> >> # discussion-request at nsrca.org
> >> # and put leave discussion on the first line of the body.
> >> #
> >>
> >>
> >
> >
> >=====================================
> ># To be removed from this list, send a message to
> ># discussion-request at nsrca.org
> ># and put leave discussion on the first line of the body.
> >#
>
>
> --
> ___________
> Jerry Budd
> mailto:jbudd at qnet.com
> =====================================
> # To be removed from this list, send a message to
> # discussion-request at nsrca.org
> # and put leave discussion on the first line of the body.
> #
>
>
=====================================
# To be removed from this list, send a message to
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#
More information about the NSRCA-discussion
mailing list