Gasoline welding gun - video

[Elizabeth Greene]

I agree with your interpretation. A bit down in the comments it says...

1. 775 dc motor with air pump attachment (12v, upto 2amp)
2. Variable speed controller with potentiometer for 12v motor
3. Syringe needle (smallest possible needle gauge)
4. Jet flame lighter nozzle
5. Plastic tubes
6. Plastic bottles
7. Gasoline
8. Water (for indication)
9. Li-ion batteries (3.7v)
10. Battery box for Li-ion batteries
11. IV set (as per requirement)

The Syringe and IV set are hacked up to make the needle to inject the fuel air mixture into the torch head from the Jet flame lighter. I can't easily get an IV set, but Tractor Supply has syringes and needles for cattle and that wouldn't be a hard hack.

A "775 motor" is a permanent magnet DC motor, a common size that's about 4" from tip to tail. I don't see a 775 air pump on ebay though, just a bunch of 370 aquarium pumps. I don't know if those would have the required oompf.

If this is your sort of thing, the nighthawkinlight YT channel just posted a video of a medical oxygen concentrator being (ab) used as a teeny-tiny oxygen lance.

[ductape]

I agree with your interpretation. A bit down in the comments it says...



The Syringe and IV set are hacked up to make the needle to inject the fuel air mixture into the torch head from the Jet flame lighter. I can't easily get an IV set, but Tractor Supply has syringes and needles for cattle and that wouldn't be a hard hack.

IV tubing really isn't the best thing to use with this. Gasoline vapor will eventually dissolve the plasticizer, causing the tubing to get very stiff and potentially crack open. Polyurethane fuel line doesn't have this problem, is a similar size, and works well as a replacement for fuel lines on small engines. Most TSC stores should have a few sizes of it in stock.