I have a friend trying to implement a 600 mm dia LPG ring burner to 
heat a LARGE casting to assist in dis-assembly of a very large beam 
engine manufactured in the 1800's to pump water for Auckland City.

If anyone can offer any useful comments on suitable burner fabrication 
it would be appreciated. Details below.



        Russell McMahon



To: "Russell McMahon" <rusl@paradise.net.nz>
Sent: Tuesday, May 31, 2005 4:25 PM
Subject: burner design and implementation


> Russell,
>
> I have been trying to build a quick-and-dirty LPG-powered ring 
> burner for
> evenly heating a large expansion joint casting on the engine at 
> MOTAT.  I
> need a ring of flame (directed inwards) about 600mm in diameter.
>
> Initial attempts were a dismal failure.  Research on the web 
> suggests that
> it is not an easy thing to do if the ring is large and you need a
> substantial heat output.  Gas dynamics fight agianst you at every 
> turn.  My
> experiments are continuing.
>
> Single point burners are relatively easier.  An especially simple 
> version
> (though I suspect the exposure used makes the flame form look better 
> than it
> is in real life) is here:
>
> http://www.backyardmetalcasting.com/oliverburner1.html
>
> For sub-1mm drills (aolid carbide) this outfit may be worth a try 
> (if they
> will ship overseas):
>
> http://shop.store.yahoo.com/drillcity/
>
> Regards,
>
> Ken Mardle

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