Continue on and see, by the way here's a video to go with it.
Step 1: Tools and Materials
*File (possibly avoided)
*A metal pen barrel
*The cap of a bic pen
*Some wire (I used bare steel wire)
*A jet lighter nozzle (If you don't have one I'll soon have an instructable showing you how to make one)
*A lighter reservoir (I used one off another jet lighter that had three nozzles, converted it to one for power)
Step 2: Explanations and Safety
Well how this happened... I was making a simple bunsen burner for the pocket instructables and as far as I can tell the new design I came up with affords too much slowing of the air/gas mixture, combined with the fact that the upper casing becomes hot, this meant that the flame reached a critical point and suddenly receded inside and turned in to a jet engine, by putting a tiny nozzle on the end after this may be able to create some thrust.
Again, I accidentally made a jet engine out of a pen.
Step 3: The Setup.
basically you have gas and air coming in one end, being burnt in the middle and hot gases coming out the other end...
So the nozzle goes on the bottom of the metal pen barrel, air holes outside the barrel, the pen lid is chopped up a tad and used to make a small sealing ring around the nozzle top, without that you'll only get a weak yellow flame because pressure can't build and also there's too much air to gas.
Step 4: Putting It Together.
Step 5: Stand It Up...
Step 6: It Lives!!!
At first there was a nice flame out the end and after three seconds or so the was a small pop and the a strange wooshing noise, holy moses I made a jet engine out of a pen and lighter...
Step 7: Now It's Better
Second pic shows the engine in it's new shape, different stands.
Hopefully you'll be able to hear the engine in this video, it's hard to tell when you already know what it sounds like.
In the video it's running really hot and is burning the powder coat on the pen tube a bit, the actual barrel is made of brass so it's pretty safe.