[TheForge] Modified Side Arm Burners

Tue Jan 21 10:02:01 2003

Frosty got a picture of this? 

In a message dated 1/21/2003 9:41:16 AM Eastern Standard Time, 
[email protected] writes:

> 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.
> 

Ralph Neumeister
Maple Leaf Forge
17231 Messenger Rd.
Burton, Ohio 44021

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