dbemery

The 2" pipe protruding downward from the gas line seems to act as an exhaust, not an air intake. When the fire is burn, it seems that unburned gas and hot air leaves the chamber through this opening. I took my wife's hair dryer (set to low)and directed air both up the 2" pipe and through the square opening at the rear. The latter seemed to work the best, but there was too much air. So I think I will try to somehow create an air/gas combo at the gas input. I don't know how yet, but blowing air into the thing seems to be overkill. Thanks for all your help, and any additional suggestions are appreciated.

Based upon the photos I've attached, how to you propose that a blower (hair dryer, bathroom fan, etc.) be attached? At the bottom of the 2" pipe, at the square hole in the back, new hole??? Also, would I need to set up a reostat to the blower to control the air volume?

Gas forge- Additional information. This is not my design. I bought the forge and an anvil from a neighbor whose husband passed on. The regulator is a Weldmark Oxy Acet alyne with lots of adjustment. The venturi (lower pipe) is 2" outside diameter. The gas line is 1/2" od. 3/8" id.

I hooked up a (BBQ) propane bottle to this forge, lit it up and all I got was a lazy yellow flame that wants to come out. I think it needs a blast of air, but I'm not sure how to modify it. Would someone look at the photo and tell me what they think?