adam
Junior Member
Joined: August 2022
Posts: 52
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Post by adam on Aug 26, 2022 13:38:37 GMT -5
Welding skills suck, but should at least hold. Couldnt find a funnel that has more taper on it so had to use the piece that coned down that was on the sodacid fire extinguisher
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miuge
Veteran Member
Joined: March 2014
Posts: 200 
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Post by miuge on Aug 26, 2022 14:12:39 GMT -5
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Post by slittlewing on Aug 26, 2022 14:14:13 GMT -5
I would highly advise against welding the spark plug. You may have problems with burning the electrode off or it might need cleaning. How will you pass this and the fuel line through the outer skin?
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adam
Junior Member
Joined: August 2022
Posts: 52
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Post by adam on Aug 27, 2022 12:56:25 GMT -5
Thanks miuge, well before i welded it on i was wondering about that too but it seemed like noone makes a nut that will screw around the threads thats that fine and big and i really just wanted to stop waiting to get this finished and so i sacrafice good looks and better quality for just being able to get this thing going. I was thinking it couldnt be worse than a 2 stroke fouling plugs cuz all its going to be is propane/air mixture which made me think it cant be to much soot on the end of the plug from just that, didnt think about the metling part but it is steel so not sure how hot it will get in there. I guess if need to than i can just grind it off whenever, and as for the outer chamber im just going to weld a ring that connected the outchamber to the side of the flame tube and literally right above the primary holes, i realized i got the primary holes up right at the end of the tube so but there a little Bit of room or I can just well the rain to wear it's flares down but still leaving the spark plug and And fuel nozzle exposed. I Was wondering and thinking that it should be fine,Except for maybe not allowing any cool airflow over it. going to do the other end with the ring going to the side of the flame tube right before before the funnel down piece
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adam
Junior Member
Joined: August 2022
Posts: 52
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Post by adam on Aug 27, 2022 23:07:10 GMT -5
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adam
Junior Member
Joined: August 2022
Posts: 52
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Post by adam on Aug 27, 2022 23:08:56 GMT -5
Welp i almost gave up on this due to how ugly the welds where comming out, i know half of it is me maybr a little more but im going to junk this flux core wire and get a tig and learn on that, im done with fluxcore welding. Has got to be one of the ugliest combustion chambers but as long as this runs ill be happy :]
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Post by racket on Aug 28, 2022 0:55:44 GMT -5
LOL, give it a coat of paint , paint fixes my crappy welds ;-)
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adam
Junior Member
Joined: August 2022
Posts: 52
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Post by adam on Aug 28, 2022 17:39:44 GMT -5
Id paint it but i painted my last one using that high temp bbq grill spray paint and it still cooked all the paint off. Gonna just leave this raw and let it discolor from the heat, maybe it will put a cool even burn pattern on it, not sure how hot the outside gets since it gets cooling air thow. I saw this cool vidoe on youtube from warped perceptions where he 3d printed the outside chamber of a rc jet turbine and you could see what the flame tube looks like while its running and supprizingly the see threw plexi glass outer chamber was not melting due to the cooling air passing along it, only the flame tube was glowing red.
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Post by racket on Aug 28, 2022 19:13:21 GMT -5
Yep , the outer can wall shouldn't get any hotter than the T2 unless theres severe glowing of the flametube, endcaps can glow if its also the end of the flametube
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