[TheForge] A challenge to Harry

[Jerry Frost]

I understand living on the job, I did that for too many 
years.

Once you decide what refractory to use you can figure 
out what chamber volume will be and make the 
appropriate number of burners. It's a pretty straight 
foreward calculation (if that isn't too pretentious a 
term for it<grin>) 1ea. 3/4" burner per 350 cu/in. Or 
1ea. 1" per 700 cu/in.

This ratio is based on a linear inducer type burner, 
(Aussie, Riel, etc.) if you build a jet ejector type 
(Side arm, Porter, "T", etc.) you can heat more volume. 
Of course it's better to have more burner than you need 
than need more burner than you have.

Depending on what you want going on in your forge 
chamber will determine what size and number is best for 
your purposes. Suppose you have a forge with 1400 cu/in 
volume. Heating it with one 1 1/4",  two 1" burners or 
four 3/4" burners will all work. What will happen 
though is the more burners you have spaced through the 
chamber the more even the heat. Even heat is more im 
portant if you work large pieces, heat treat and the 
like. High spot heat is better if you want to limit 
where the heat goes; welding one join on a large built 
up piece for instance.

Anyway, let us know what you decide and we can give you 
more specific ideas.

Frosty
-------------------------------
If it ain't forged
it ain't real.
Wrought iron is.
The FrostWorks

Meadow Lakes, AK.

http://www.artmetalradio.com/

From: "IowaHarry" <iowaharry at fastmail.net>


> Hey Jerry,
>
> As to how I would fire the larger forge? If I hang 
> enough propane burners on it to make it look like a 
> nuclear device that should probably do it right? Ok, 
> that might be a little excessive. But just the same, 
> multiple propane burners to make a larger hot spot. 
> 40" may be too much and that may get trimmed down. I 
> haven't made any headway on the little one yet so 
> plans on the bigger one are ephemeral at best.
>
> Still living at work, Harry
>