[TheForge] Sidearm burners

[Jerry Smith]

Rick,

I want to use one or more of these burners for my
foundry that I am building, I have a great propane
forge that has been up and running for years. 

I need to heat a carbon cauldron up to the melting
temperature for bronze and aluminum. That is what
sparked this thread, but I am thinking of the side
burner with a variable speed blower hooked on it.

Jerry

--- Rick Korinek <rickkorinek at verizon.net> wrote:

> Steve, 
> Does your burner(s) have a means to adjust the
> combustion air going into the
> burner?  If not, you will not be able to restrict
> the amount of air to get
> close to stiochometric point and this usually means
> excess air and lots of
> scaling/oxidation.  A little excess air generally
> raises the temp but too
> much drives the temp down.
> 
> I also use Larry's side arm style and have to
> throttle the air down quite a
> bit.  I don't have any instrumentation so I adjust
> so flames have slight red
> edges and open a bit more.  Helps to do in a
> darkened shop.  
> 
> Rick Korinek
> Island City Forge
> Minocqua, WI
> islandcityforge.com
>  
> 715/358-5060 shop/studio
> 715-892-7425 cell
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net
> [mailto:theforge-bounces at mailman.qth.net] On Behalf
> Of Steve Smith
> Sent: Tuesday, February 13, 2007 6:05 AM
> To: Sponsored by ABANA; frosty at customcpu.com
> Subject: [TheForge] Sidearm burners
> 
> 
> Jerry Frost wrote:
> 
> > A jet ejector type burner like the: Fisher,
> Porter, Rex's series, 
> > sidearm, "T" jet, etc. have the air intakes at 90*
> to the jet. A 
> > commercially designed jet ejector will induce a
> max of 29:1. (gas to gas)
> > 
> > Don't ask me why simply moving the air intakes
> makes so much difference 
> > to the induction rate, I don't have any idea. What
> it means for us is a 
> > more efficient and easier to make burner. If you
> build a linear you have 
> > to hit it pretty darned accurately to get a 16:1
> ratio for a neutral 
> > burn. If you build a jet ejector you have a LOT of
> tolerance to play 
> > with. I like easy. <grin> This is why such crude
> designs as the "T" jet 
> > and Sidearm work so well, there's just a lot of
> room to play with.
> 
> I'm responding to Frosty's comments, but welcome
> replies from all.
> 
> I'm still messing with burners in a very slow
> fashion. I've made maybe a 
> dozen Reil burners and have been very happy with
> their performance. I 
> make the jet out of 1/8" brass pipe, aligned with
> the axis of the 
> burner, jet hole drilled in the brass end cap.
> 
> I was pretty interested in sidearm burners when they
> were first 
> discussed. I followed in Frosty's footsteps and
> experimented with a 4 
> way pipe fitting instead of a sidearm. It was ok,
> but not as good as the 
> Reil burners, which I chalked up to not having a
> smooth transition to 
> the 3/4" body.
> 
> Then I saw that Larry Zoeller had added a sidearm
> 'kit' (all you have to 
> do is tighten things up). I bought one of these. It
> came with a tapered 
> mig tip for the gas jet, pretty nice setup and for
> not much more than 
> the fittings would have cost me. I recently compared
> the performance of 
> this sidearm burner to a Reil burner. Both are 3/4"
> body with Larry's 
> stainless flares on the end. I measured with a
> thermocouple, both in the 
> same, single burner forge.
> 
> The sidearm was almost as good as the Reil burner.
> Final temp was maybe 
> 100 degrees lower. This makes me think that the
> sidearm is just an easy 
> way to put the same burner together, and less
> impressed with the mig 
> tip. Sounds like this isn't correct--what am I doing
> wrong?
> 
> I'm at maybe 300' above sea level, neither burner
> has a choke. Pictures 
> could be done if important to the plot.
> 
> Thanks,
> Steve
> _______________________________________________
> Manage membership or unsubscribe at:
> http://mailman.qth.net/mailman/listinfo/theforge
> theforge mail list group photo site is
> http://www.photoaccess.com
> Login:  blacksmithblacksmith at hotmail.com
> password:  anvil
> ___________
> 
> 
> 
> 
> _______________________________________________
> Manage membership or unsubscribe at:
> http://mailman.qth.net/mailman/listinfo/theforge
> theforge mail list group photo site is
> http://www.photoaccess.com
> Login:  blacksmithblacksmith at hotmail.com
> password:  anvil
> ___________
> 
> 
>