[TheForge] Modified Side Arm Burners

Tue Jan 21 10:28:03 2003

        Frosty,

    Ralph the Bear.........I could get used to that!   My wife tells me I'm
bearly bearable.  :-)

        Thanks for the burner suggestions as I'm building some new burners
lately.  I do find the double 90 degree elbows offered just the ticket for
gas mixing in my forges, and the lower velocity kept the end of the flame
off the forge floor that was causing cold spots from unburned fuel mixtures
with the straight burners.........that also would not idle well.

Ralph


----- Original Message -----
From: "Jerry Frost" <[email protected]>
To: <[email protected]>
Sent: Monday, January 20, 2003 5:20 PM
Subject: Re: [TheForge] Modified Side Arm Burners


> This is how I do them. It's a jet ejector type inducer but we can call it
> something cool like T-bone burner or whatever. <grin>
>
> 1" x 9" black pipe, (burner tube) 1 1/4" x 1 1/4" x 1 1/4" "T", 1 1/4" x
1"
> bushing, 2" all thd. lamp rod, lock nut for same, 1/8" fpt x compresson
> fitting (brass) and a 0.040 Miller mig tip.
>
> Using care, simply drill the "T" square and centered, opposite the burner
> tube leg and tap 1/8 fpt. The brass fitting is drilled and tapped 1/4"-28,
> this screws onto the lamp rod and the mig tip is screwed into the fitting.
> Install the lamp rod into the "T" with lock nut (external), attach the
> propane with teflon tape and adjust for proper depth. My propane hose
> fitting fits the lamp rod just fine with a little teflon tape for a good
> seal.
>
> To get a visual of the thing, if you point the burner tube straight down
> it's a short armed "T" with the end of the lamp rod and propane hose
> sticking up out of the top.
>
> Takes me maybe 15 minutes to put one together and as built, burns slightly
> rich at any psig my 5-50 psi  gage will read.  I'd eliminate the bushing
but
> it's really hard to find a  1 1/4" "T" with a 1" in the tap position
around
> here.
>
> A point about propane and turbulence. Propane and air do not mix well,
it's
> why propane conversions on oxy-acet torches do so poorly. A little
> turbulence improves mixing and efficiency. Of course too much turbulence
> inhibits induction and efficiency. A balancing act as usual. <grin> Poor
air
> propane mixing is the reason you can see BOTH scaling (oxidizing burn) and
> pink/blue flame emerging from the forge door (carburizing burn) at the
same
> time.
>
> I have this dialed in so I'm going to drill a brass cap for my next jet
> instead of using a mig tip. The cap's flat end will do two things:
>
> First, it'll allow me to move it farther back from the throat than the mig
> tip allows.
>
> Second, being flat, should induce a little more turbulence and (hopefully)
> improve mixing.
>
> I haven't been using flares on my burners but they produce plenty of heat
> anyway, my little forge welds easily.
>
> My next forge is going to be similar to Ralph Bear's. It'll have a lid on
a
> jack so I can adjust it's height and stackable sidewalls so I can adjust
the
> width / length. I have the pan rammed up and have rammed the flared
nozzles
> in the lid. The pan, lid and sidewalls will be fire clay and perlite but
> faced inside the forge with high temp refractory as are the nozzles. I
doubt
> 4,000f refractory nozzles will burn out any time soon. The lid has four
> nozzle positions rammed in so I can keep a proper burner to volume ratio.
>
> Frosty
> ------------------------
> If it ain't forged
> it ain't real.
> Wrought iron is.
> The FrostWorks
>
> Meadow Lakes, AK.
>
>
> ----- Original Message -----
> From: "Larry Zoeller" <[email protected]>
> To: "theforge" <[email protected]>
> Sent: Thursday, January 16, 2003 12:53 PM
> Subject: [TheForge] Modified Side Arm Burners
>
>
> >
> >
> >
> >
> >
> >
> > To All,
> >
> > I have been following this thread about the side arm burner, I have
heard
> some interesting comments about the burner. I think that there have been
> some useful suggestions or alternative ways to build them. I do not like
the
> idea of using a standard tee and a bushing, this cuts down on the air flow
> and causes an erratic burn. I have not tried like Dragonwatch suggested
and
> grind down any shoulders on the inside, this could work.
> >
> > I would like to hear what size contact tip that you are using in your
> sidearm burners?
> >
> > I also uploaded a pdf file with a drawing of the Modified Side Arm
Burner
> on my web site if you care to view it or download it.
> >
> > http://www.geocities.com/zoellerforge/sidearm.html
> >
> > &nbsp;
> >
> >
> >
> >
> > Larry Zoeller
> >
> > [email protected]
> >
> > Why Wait? Move to EarthLink.
> >
> > &nbsp;
> >
> >
> >
> >
> >
> >
> >
> >
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