rburrus44

Thanks! Wish I would have done the connection to the parachute different but just being picky with myself.

Finally got it done and this is what I came up with. Customer was very happy with it. Sorry for the lousy camera photos.

Yes thank you all for the multitude of suggestions, I really appreciate all of the differing ideas. Its still probably a month away before I start but ill post pic of what I come up with in the end. By all means though keep the discussion going please

skydiving for sure... or getting sucked into a black hole maybe? I've had two ideas so far as how to approach. 1. fuller in the neck from sq stk, round above the fullering into head and treat the torso and limbs as a "split cross" below the fullering. 2. use a wire twist method like in your photo SS but probably not as complex. thanks for the ideas so far

Have a potential order on the table for Father's day that I have begun to think about. It will be a skydiver in a few positions. The parachute will be easy enough but not sure how I want to do the person yet (~5" overall height). Doesn't have to be super realistic so I wanted to reach out for any suggestion and if anyone has done/ has pictures of a small human figurine. Thanks

Sorry can't help with your actual question but where are you getting your coal from and what are you paying?

quick update. So after trying a few more things with the .023 nozzle I came to the conclusion that it was just to small of a jet. So I bumped up to an .030 tip and am work with that now. through progressive trimmings I am at about .5" long and still running a bit rich but it is starting to look way better and beginning to have a few blue flames in the DB. hopefully after a few more trims I will be there Fudd I sent a PM your way

Frosty: I have tried turning the pressure up to almost 15 psi and the general flame characteristics are the same just larger. I thought I had read someone say to tune at low pressures because the induction curve is pretty linear up to 20 psi or so. I bought coupler today to act as a flare and ran the burner otherwise unchanged in the forge (but did not have a chance to trim the liner away) and still the same flame maybe slightly better but probably not. I did try to run it with the flare outside of the forge and could not keep a flame lit by itself but using a lighter could keep it going and saw that the flame looked much much better, probably heavy on the lean side. this leads me to believe that it may be the liner causing to much back pressure so that is going to be my next step is to open that up so that I know it is not in the way. I am also going to trim a .030 and .035 tip tomorrow and start playing with those after I have worked on the kaowool. Fudd and TP: I know your right so I got a birthday coming up and will ask the Mrs. to pay the membership for that

It is 1/2" from the tip to the shoulder on the mig tip that butts to the 1/8 npt fitting. before I got the kids ready for bed I made a few more cuts down to 3/8" and its running the same. I am now in between 1/4 and 1/2 way through the T as you described now. I do not have a flare on it, tried to mold it into the liner but think I might have done a poor job at that. I will try opening the hole in the liner tomorrow and using a steel flare. This may be a silly question/ thought but could the .023 nozzle be to small and the propane jet not be expanding to fully to meet the burner tube and creating a pseudo "leak" that would be robbing the induction action? Thanks for the suggestions.

Sorry for all of the posts but here is a good picture that shows the orange flame the best. This is the .023 tip that has been trimmed to slightly under 1/2 inch

Don't know how to put the video into comment but here is a link

The first two pictures are deceiving, the flames in the forge are orange and all around the blue cone is orange flames

So I took a video that is being uploaded to the tube now and will post in a little bit. Frosty: 3/4 inch design so the burner tube is 6" length, 1 x 3/4 x 1 (3/4 in middle) T and a .023 tip. timgunn: I have ran the burner in the forge with and without a rigidizer applied and the same burner performance. I turned the pressure up to ~10psi and the flame had the same characteristics just larger. Fudd: I would really like to join just a bit short on time now with full time work, masters degree and two young children haha but plan to join at some point. Thanks for taking the time to help, I know that you all answer these questions often and I have looked through a lot of them and really appreciate the time for another one.

So I built my first burner following Frosty's T design and now trying to tune. I am at 5,000+ feet of elevation so I followed the design and started with a .030 mig tip and was burning rich. changed to a .023 tip and still rich then trimmed the tip to 9/16 length and it still seems to be rich. the flame is blue coming out (not as compact looking as a netural or lean flame) but around it is orange and all the rest of the flames in the forge are orange and DB is also orange. This is all at about 5 psi. Can the .023 tip be to small and not be creating enough vacuum to pull the air in? go back and trim the .030 tip shorter? Thanks for the help this is my first adventure into gas forges. I'll try to get some pictures tomorrow before anything gets changed