What is the propellant in a flamethrower?

Some friends and I were discussing military flamethrowers, and everybody was wondering what the propellant was. The flames can go something like 20-100 feet, if I recall my war history footage correctly.
Somebody said it was the chemical reaction between liquids/gases in the two tanks, and others said it was pressurized, which, given the distances, doesn’t make sense to me.
A Wikipedia search didn’t help, and, usually, a Google search turns up some improvised survivalist formula, or else, nothing at all.
Can anybody help?

Thanks,
hh

I’m pretty sure they just spray gasoline. It comes into contact with a propane torch flame on the way out and catches fire.

Edit: Wikipedia mentions that the gas has a “thickening agent” in it, which makes sense.

According to the Wikipedia, the propellant is compressed nitrogen gas, in one of the tanks:

Thank you, Sage Rat and AClockworkMelon. I don’t have any idea why/how I missed that Wikipedia info. :smack:

There was another propulsion method:

[QUOTE=Wikipedia]
Some Soviet Army flamethrowers had three backpack fuel tanks side by side. Its user could fire three shots, each emptying one of the tanks. The mechanism used to empty the tank was not a pressurized gas cylinder but a black powder cartridge on each fuel cylinder.
[/QUOTE]

I have seen flamethrowers that were powered by (what looked to be) 12 gauge shotgun shells.

This is the kind I’ve seen, the LPO-50. The issue with that model is that you get only three shots, one from each tank. You have to fire the whole tank in that one shot. And you had better be laying down, because the kick is powerful. On the other hand, it has better range than most (70 yards).

What is the thickening agent for? To make any unburned fuel stick to the target?

The term can also be “jellied” - we used to do a home-made version by taking 100 octane and dissolving styrofoam in it to saturation.

More to make it burn longer by providing both a flamible and a fuel. Like adding fat and wax to a cotton string to make a candle.

That and to keep the stream from dispersing, if not you’d end up with a fireball not far from the nozzle, good for show, not so good to do bunker BBQ.

Sounds like a troubled childhood.

Or a fun childhood. We had a mixture of sunscreen, lighter-fluid, and something else that we would create a river with in a trench dug in the ground. We would build bridges and put army men in the river and on the bridges, then set it aflame.:smiley:

And Memorial Day is a remembrance for those “siblings in arms” that didn’t make it?

:smiley: I don’t remember ever getting injured burning army men. Sooty, sure, but no loss of limbs or serious burns.

Shhhh. Don’t tell him about tannerite.

Sounds like fun, kayaker. We got the old wives’ tales growing up, but weren’t allowed to try and put them into practice.

Did your creation smell good in the mornings?

If I had a nickel for every time I singed my eyebrows and/or arm hair off …

I think you are talking about Dragon’s Breath. These are 12ga incendiary rounds that spray fire for a couple seconds. They are not at all as effective as an actual flame thrower.

Same here. Never did so by accident, tho.

Does the US Army still field a flame thrower? I thought they were discontinued in the 90’s.