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Compressed Air/ Propane Burner

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Meldonmech:
The torch was then assembled

Meldonmech:
A temporary hearth was assembled on my picnic table to enable the experiments to proceed.  A 4inch nail was to be heated up. I connected the propane and set it at 0.7bar, and the air at 2bar. I switched on the gas, and started the compressor, lit the gas and turned to full, turned the air on very slowly, and was amazed and surprised at the power of the jet. The nail heated up to bright red in a matter of seconds. What a difference that compressed air makes. As to the jet size, diameter of flame tube and gas and air pressure settings they were perfect. I really cannot believe what I achieved it has given me a real boost.
                       
            Thank you Ironman for your help.

                                                                               Cheers David

Meldonmech:
Hi Matthew

                    Thanks for comments, I to can remember the metalwork classes at school, used the brazing hearth a lot for annealing gilding metal. I was making a planished tankard which I still have.
 

                                                    Cheers  David

Arbalist:
As Mathew says, propane has enough pressure to produce a Venturi effect to push more air through.

http://amalcarb.co.uk/downloadfiles/amal/amal_gas_injectors.pdf

It may be more cost effective to conserve the heat by using refractive bricks rather than increasing the gas pressure. Just a thought.

vtsteam:
Interesting!  :thumbup: I'm going to have to look into that besides the atmospheric torch I have for brazing  :coffee:

That's quite a simple torch, too -- never seen one quite like it before for oxy/acetylene. Kinda cool! Hose clamps on the fuel line, though, please.....  :poke:

 :clap:

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