[TheForge] Sidearm burners

[Steve Smith]

Rick,
You raise an excellent point. I'll try adding a choke. It seems like I 
could get the forge up to temp and then play with the amount of choke to 
maximize the temp. I'll give this a try the next time I can get out 
there (after taxes are done...).

Thanks,
Steve

Rick Korinek 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
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