[SPAM] Re: Re: Webra Problem

Fri Jun 11 15:24:10 AKDT 2004

 Brian
 That is called a liquid manometer and is used in calibration labs with mercury as a liquid. Thus the term inches of mercury takes meaning.Any liquid could be used such as fuel and has no meaning except relative to fuel weight. I have a pressure gage to use.A person could also use a vacuum gage like is used to set old fashion carburators,but the vacuum gage would be installed in the tank supply before the pump,thus measuring the pumps ability to pull the fuel from the tank. Either way is relative to the pumps ability to function.
A cline regulator is $60 + a check valve and is the easy way out.

  Jim Ivey

> 
> From: Brian Young <b4598070 at yahoo.com>
> Date: 2004/06/11 Fri AM 10:03:54 EDT
> To: discussion at nsrca.org
> Subject: [SPAM] Re: Re: Webra Problem
> 
> Just a thought on measuring the pump pressure. I
> talked to John Fink (hope I got the name right, from
> Denver area) who was having problems w/ setup on a
> 1.60. He discussed measuring the pump pressure by
> installing a T in the line between the carb and the
> pump then ran a length of tubing up the wall. The
> pressure will push the fluid up the line, I cant
> remember how many inches of fuel he wound up with to
> get the engine running right.
> 
> I repeated the procedure on mine and found it to work
> well for measuring pressure, again I cant remember how
> high the column was. This is easier than a low
> pressure gage and anyone can do it, you can convert to
> psi if you choose.
> 
> 
> --- jivey61 at bellsouth.net wrote:
> >   Hey guys
> >  I can't beleive as much as we have had pump
> > problems no one has put a pressure gage on a good
> > running Webra to see exactly what the pump pressure
> > is. I include myself here because I had many
> > problems with my Webra. I only solved my problem
> > with a cline regulater and tank pressure.
> > If we knew what this pressure was we could compare a
> > poor running engine with a good one. Also this would
> > give you a benchmark to start your setup on a new
> > engine. Just some tho'ts for Webra people.
> > 
> > Jim Ivey
> > 
> > > 
> > > From: "Randy" <randy10926 at comcast.net>
> > > Date: 2004/06/10 Thu PM 11:01:44 EDT
> > > To: <discussion at nsrca.org>
> > > Subject: Re: Webra Problem
> > > 
> > > I got the engine new used last year.  It ia a AAR.
> >  Did not fly that much last year; but the engine
> > mostly ran well.  Sometime go a little rich and lose
> > a little vertical.  Has been less reliable this year
> > after the winter.
> > > 
> > > Throttle up before vertical and bogges part way up
> > about half the time.replaced fuel tank earlier this
> > week.  Turned pump pressure in one turn today.  Have
> > high end around 3 turns out.  I see smoke on the
> > ground, but much in the air.  Seem to bog more on
> > the latter half of the tank.  Moved tank to just in
> > front of wing tube to shorten line to pump;but did
> > not see any change.
> > > 
> > > No idea how many flights before I got it, but not
> > that many as owner decided to stay with OS 140.
> > > 
> > > I am going to clean carb out in the morning.  And
> > check to see if the pump pressure is at four
> > threads.
> > > 
> > > Randy
> > > 
> > >   ----- Original Message ----- 
> > >   From: Keith Black 
> > >   To: discussion at nsrca.org 
> > >   Sent: Wednesday, June 09, 2004 2:12 PM
> > >   Subject: Re: Webra Problem
> > > 
> > > 
> > >   Randy, 
> > > 
> > >   Is the Webra new (or new to you)?
> > > 
> > >   Has it been running well and now it's not doing
> > so well or has it always had problems?
> > > 
> > >   Has the pump ever been adjusted since it was
> > new?
> > > 
> > >   When loosing power on the uplines is it wide
> > open then bogging down after being in the upline for
> > a while, or are you increasing throttle while in the
> > upline and then it's coughing?
> > > 
> > >   How much smoke does it blow when wide open in
> > level flight?
> > > 
> > >   How many flights do the bearings have on them?
> > > 
> > >   Keith Black
> > > 
> > >     ----- Original Message ----- 
> > >     From: Randy 
> > >     To: discussion at nsrca.org 
> > >     Sent: Wednesday, June 09, 2004 12:55 PM
> > >     Subject: Webra Problem
> > > 
> > > 
> > >     My webra 145 with a normal carbo seems to be
> > losing power on the up lines.  It seems to me that
> > the pump should delive a near constant flow of fuel.
> >  So I should not need to have is real rich on the
> > high end to handle the up lines.  But still losing
> > power on uplines, so have been richening it.
> > > 
> > >     Low end seems fine.
> > > 
> > 
> > =====================================
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> > 
> 
> 
> 
> 	
> 		
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