the thing is, if you are looking for range I doubt you will get it with normal viscosity fuels. Your gonna need a jelling agent if you want any sort of distance like a real flame thrower, and high pressures.
a real flame thrower can shoot at least 80 feet. Ive never seen a home made version with that kind of range, the most I ever saw like 30 feet in those youtube videos.

Well, just got back from trying it, it works well, except for a small leak in the air tank.

Main problem is it's just a stream of fire; there's no large orange flame. Need to adjust the nozzle or put some kind of screen over it to diffuse it.

what range

Don't use PVC.

Metal or gtfo.

How much psi?

I think military ones were made to operate at 300psi~ and im not sure of the tank-mounted ones.

I hope to use a metal tank eventually, would allow much higher pressures.

For now though, I feel it is the only option.

Hopefully getting the correct tank fitting tonight...


I screwed around with the pilot light fitting, and cut up a few pieces of metal I had laying around, and made a clamp-type thing held together with the bolts for a toilet seat.

I really like the way it turned out.


Here are some pictures so far...

Older, original design:

http://img227.imageshack.us/img227/6971/dsc001ov0.jpg

http://img135.imageshack.us/img135/1439/dsc002xk6.jpg

http://img135.imageshack.us/img135/6595/dsc003fu8.jpg

Newer Design with toilet/aluminum trim clamp:

http://img231.imageshack.us/img231/1607/dsc004xb2.jpg

http://img136.imageshack.us/img136/8990/dsc005fo2.jpg

http://img126.imageshack.us/my.php?image=dsc006yg9.jpg

can you please inform me of the range of your weapon

^ weapons are illegal remember?

It's a self-contained flame dispersal system

Unknown at this time. Tank still leaks.

Any ideas for how to seal the pvc screw-on endcap?

Going to try Teflon tape soon.

You need teflon tape. It's standard in all plumbing screw fittings.

13579, are you Endotropic Decay? I just got really confused...

Yes. I used that account for awhile to throw off some people I know IRL who were reading my posts.

Should probably email a mod so I don't get banned...

Cooking oil works. At work we use cottonseed oil, and we spray it on the grill sometimes. If theres a flame and you press the squeezy bottle hard(so it turns into a mist) it'll make a flame maybe 1meter long. If it's just a steady stream it wont ignite.....hmm

Ways around this for use in a flame thrower?

edit:tested it last night

Test yielded.....?

RDP

^ O.o? You mean by-products or....

Makes a bright orange flame, guessing around 300-500C, makes it very uncomfortable to stand within 3-4 meters of it, seems to burn cleanly otherwise, just need more force and maybe a gelling agent....

Could also keep it very cold, as oil will solidify or freeze at a certain temperature, but not really practical/economical.

Gelling agent = fake napalm?

As in, mix gasoline and soap or styrofoam packing pellets to make gelled gasoline?

Distill your own. Use pure grain alcohol/ever clear. Pharmacys sell 91% isopropyl for about $1.00 a pint, it burns well. Don't try the 70%.

Maybe using some gelatin in the alcohol, it could/should thicken the fuel.
But 1dollars a pint for IPA at a pharmacy? I have to pay 2,5eur of a mere 100ml, and thats technical grade and the maximum they sell to a individual.

Real napalm (really napalm B, modern version) is only benzene, styrofoam and gasoline so ..