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  #41  
Old 07-25-2022, 01:20 PM
foamcar foamcar is offline
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New hose hooked up. No leaks. Only way I can get gas to flow is to hold down what I thought was cutting lever.
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  #42  
Old 07-25-2022, 02:20 PM
crystallographic crystallographic is offline
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New hose hooked up. No leaks. Only way I can get gas to flow is to hold down what I thought was cutting lever.

"Idle" should be separate valve, then lever is big boost.
Idle is set, O/A, neutral flame.
I have welded thin sheet with cutting torch, at idle.... no boost....using O/A ...
and also O/H.
You only need to heat metal - not welding. Small flame at idle.... plenty to heat the short stripe you are needing.

Probably zero photos of the torch you are now using?
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  #43  
Old 07-25-2022, 02:34 PM
foamcar foamcar is offline
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20220725_153104.jpg

20220725_153052.jpg
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  #44  
Old 07-25-2022, 02:35 PM
foamcar foamcar is offline
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Smith Airline lite-o-matic

Owner says only way he can get it to work is holding lever down. Let up and it shuts off.
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Last edited by foamcar; 07-25-2022 at 03:14 PM.
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  #45  
Old 07-25-2022, 11:27 PM
crystallographic crystallographic is offline
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Smith Airline lite-o-matic

Owner says only way he can get it to work is holding lever down. Let up and it shuts off.
Okay then, practice the hand maneuvers needed to operate that Smith.
Get sorta fluent with it, on-off-on-hot-hotter-off.
No sense in over heating that tender spot, unnecessarily.
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  #46  
Old 07-30-2022, 05:51 PM
foamcar foamcar is offline
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20220730_183352.jpg

20220730_183114.jpg

20220728_110845.jpg

Finally making progress. Rig had no flame arrestors so got a pair today. Could not get acetelene to flow beyond a dribble. Took valve off torch and blew compressed air into inlet as blockage was between there and valve. Got it flowing good and was finally able to light torch and get desired flame. Welded cheap comma dolly on top of slapper to press up underneath. 4 seconds of heat along ridge and bulge came down(shrank?). Made metal template and fits much much better. Small ridge just below one removed. Thats next.
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  #47  
Old 07-30-2022, 07:33 PM
crystallographic crystallographic is offline
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Originally Posted by foamcar View Post
Attachment 64128

Attachment 64129

Attachment 64130

Finally making progress. Rig had no flame arrestors so got a pair today. Could not get acetelene to flow beyond a dribble. Took valve off torch and blew compressed air into inlet as blockage was between there and valve. Got it flowing good and was finally able to light torch and get desired flame. Welded cheap comma dolly on top of slapper to press up underneath. 4 seconds of heat along ridge and bulge came down(shrank?). Made metal template and fits much much better. Small ridge just below one removed. Thats next.
Good progress on your metal - and on the old torch!

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  #48  
Old 07-30-2022, 08:46 PM
pato1 pato1 is offline
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just one more congrats!-you showed that bump!
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  #49  
Old 08-06-2022, 05:07 PM
foamcar foamcar is offline
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Made a longer template to check overall conture. Pretty good fit. One last small ridge circled in red. Kent why a covex dolly on a concave surface when heat shrinking? Seems concave would help it match contour.
20220806_172439.jpg

20220806_172412.jpg
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  #50  
Old 08-06-2022, 06:48 PM
steve.murphy steve.murphy is offline
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Nice work.
I use pizza box cardboard too.
Cheers Steve
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