Oh well,, I just can't help it. Here I go again..... I didn't have a 1" drill so had to drill 1/2" and bore hole using home made counter-boring tool. Full 1/4" cut there, had to brace my arm well on feed handles while feeding cut. Once cut started had to keep it feeding at just the right rate for smooth boring. Plenty of "Trefolex" cutting compound helped cutting action a lot. It jumped about a bit when breaking through though.
1/2" bar with 3/16" dia tool steel, grub screw comes in from bottom end of bar.
Nozzles. Made out of Al bar stock, it's a good quality machining grade, I've had some 3/4" dia stuff lying around for some time. The mounting thread is M6x1 the jet is 1/16"
Oh NO!! Enough for TWO burners,,,I need help! Now if only John H. (England) lived a little closer, I could let him have one of these "soil aerators" to experiment with, no telling what he might try to use it for.
The Al block that the jet and brass fitting are screwed into is made from my own cast "log" as seen on one of my other pages.
It actually burns without any flared nozzle though there is flame inside the tube from about 3" in from the hot end. I don't know if this is detrimental or if it is normal for this size burner. The ID of this black pipe is actually 2-5/8". I would actually like to see a nice shaped blueish cone out the front, like the mini-mongo on my other page. I've got two mini-mongo's now too (yea I know, I'm MAD)
The visible flame is about 2-1/2 foot long. Beaaauuutttifullll.
Even though there is flame inside the tube I thought I would try it anyway. I did a small melt of Al in a steel crucible, certainly got it melted fairly quickly. As you can see the hot end is certainly hot, the cold end got fairly warm during this melt time.
Just a quick experiment at fine tuning. I varied the position of the larger pipe but I couldn't get the flame to come out of the pipe. I also moved jet position (the Al block slides easily in the pipe) and air restrictor. The best position seemed to be with the larger pipe 2" out from the end of the burner pipe. It burns with or without air restrictor or pipe on the end, ball valve can be nearly shut(small smokey flame) or completly wide open and with regulator at full(50PSI) or down quite a long way. The file downloaded from Ron Reil's site shows that a refractory venturi may be needed in the burner pipe. I will try during coming week a 1 in 12 flared end piece see if that will bring all the flame out. Any thoughts/suggestions welcome,,so who's been playing with big burners?
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