[TheForge] Gas Forge "Chuffs"

[Adam Whiteson]

Sounds like you might have a back pressure problem - either too small an 
opening for the exhaust or flame is running into the forge walls too soon - 
and perhaps this is due to the difference in burner angle you mention - can 
you try  adjusting the burner angle?

Adam


At 11:42 PM 1/28/2003 -0500, you wrote:
>Greetings,
>         I participated in a gas forge construction workshop this weekend, 
> in which we build 14 new double burner atmospheric gas forges.  They are 
> made out of 10" thin wall pipe, with two non-blown burners coming in 
> horizontally near the top of the forge.
>         Got mine home and fired it up.  Runs great at 20lbs gas, but when 
> I reduce the psi down to 5 or 7psi the combustion "chuffs" (surges) and 
> does not burn completely.  There is a massive amount of blue flame coming 
> out the front, no matter how far I open or close the air gates 
> (adjustable disks on the end of the burner pipes).
>         I have seen a number of these exact forges run well, so I don't 
> think it's the design.  However, with any mass construction effort there 
> is bound to be minor differences.  For instance, most of the forges built 
> had the burner pipes running slightly "down hill" into the forge, where 
> mine run slightly "up hill".
>         Any suggestions on the combustion problem?
>
>Thanks,
>Scott
>
>_______________________________________________
>http://mailman.qth.net/mailman/listinfo/theforge
>theforge mail list group photo site is
>http://www.photoaccess.com
>Login:  blacksmithblacksmith@hotmail.com
>password:  anvil
>___________
>
>