The Accidental Pocket Jet Engine...
Intro: The Accidental Pocket Jet Engine...
Yep, that's right a baby jet engine, it takes in air and uses fuel to heat and therefore expand the air, this particular engine is more a functioning model, it produces little thrust in real terms, it is however a lot of fun and makes one interesting ornament, albeit a dangerous one.
Continue on and see, by the way here's a video to go with it.
Continue on and see, by the way here's a video to go with it.
STEP 1: Tools and Materials
Tools:
*Pliers
*File (possibly avoided)
*A lighter
Materials:
*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)
*Pliers
*File (possibly avoided)
*A lighter
Materials:
*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
Ok you are dealing with fire and gas here, so at this point I would like to explain that I take no responsibilty for injury or damage caused by the items shown in this instructable, also if you're under 13 I suggest not doing this at all, just because you're under thirteen, fire may cause rash judgements in males under 50 and females under 16.
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.
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.
This is dead simple.
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.
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.
So first thing you'll need is to make the nozzle fit tight in to the pen barrel, my way of doing this was simply to cut the end off of the bic pen lid and fit it over the barrel and shape it so that the air holes were open, very important. after fitting it to the nozzle you slide the nozzle assembly down the pen barrel and then grip the bottom part of the nozzle and pull and wiggle the nozzle down until the air holes are at least halfway clear of the barrel bottom.
STEP 5: Stand It Up...
I used some wire and a bit of speaker mesh to create a decent collapsible stand for the rest of it, I then used some wire to hold the gas tank in place on the mesh aswell, after this I connected the nozzle up to the gas tank.
STEP 6: It Lives!!!
So after pulling the little lever bit to start the gas flow I held a lit lighter to the end.
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...
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
So after some more modifications and using a different nozzle I've managed to avoid plastic parts and give it more power, also with a video...
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.
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.
515 Comments
prince Rajesh 11 years ago
mrsensenig2000 2 years ago
leeh80 8 years ago
Use electric sparks
9786756 2 years ago
KyleY24 2 years ago
JasonP304 4 years ago
ceraman 13 years ago
jompon2547 6 years ago
i agree with you
this model of jet engine don't event have fan or motor for air compressor
it look like it have a power
but it actually don't have the power
rbetel 9 years ago
I would say this is more of a small rocket than a jet.
Deckdogs11 7 years ago
killerjackalope 13 years ago
Rubens?? 7 years ago
Rishabh_M 7 years ago
please help me with the nozzle i literally read all of the comments and wasn't able to find any help there...got almost everything of it except the nozzle which connects the fuel(lighter body) to the combustion chamber(pen body)...if you just give a rough design of the nozzle including the air holes (on this and the previous version) will be really a lot helpful...I just wanted to build a small working model showing the working of pulse jet for a demonstration active session to my colleagues...
any help will be appreciated..!!
Thank you
Opposedspartan6 8 years ago
diybomber834 8 years ago
i am makeing a me 163 rc plane so pls
diybomber834 8 years ago
make a biger vershon pls
DEEJAY642 8 years ago
pretty cool but slightly techo
T0BY 8 years ago
KipH 9 years ago
What is the jet nozzle made of I can't find a video of how to make it.
DatKoolKid2320 9 years ago
hey this is sweet and I want to build it but im not sure how if I can use a regular lighter or not and I don't know where to poke the holes.