Introduction: Office Supplies Challenge - Liquid Fuel Rocket

Picture of Office Supplies Challenge - Liquid Fuel Rocket
Liquid Fuel Rocket made from office supplies. Warning, this is kinda dangerous, I had one blow up in my hand already, it was more startling than anything, the two halves flew off in different directions, (wear leather gloves just to be safe.). But they'll fly about 75 feet straight up.

Step 1: You Will Need

A Sharpie
Canned Air
Electrical Tape (Substitute Packing Tape)
Ball Point Pen
Rubber Band
Bottle Cap
Robot Sticker (optional)

Step 2: The Rocket Body

Picture of The Rocket Body

Disassemble the sharpie and remove the ink and the point.

Cut a piece of ink tube 3/4" long from a ballpoint pen and wrap one half with a small piece of electrical tape.

Insert the tube into the sharpie where the point used to be, tap it until firmly seated.

Reassemble the two halves of the sharpie.

Step 3: Guidance

Picture of Guidance

The fins are made by folding tape over on it self and attaching the tag ends to the rocket body, trim into a rocketish profile. Attach three equally spaced around the body.

Step 4: Propulsion

Picture of Propulsion

Take the canned air, bend the straw down next to the body, space it out with the bottle cap and secure with a rubberband.

Step 5: Launch

Picture of Launch

Outside, invert the can of canned air, slip the rocket body onto the straw. Hold the rocket body and depress the trigger on the can, allow a short time to pass and release the rocket. Wash Rinse Repeat.


he who crashes often (author)2012-03-12

the ones at my local hardware store are compressed co2 and if you turn them upside down they shoot out liquid co2 and you can flash freeze things. i once used an entire can on an onion, threw it on the ground and it shattered. however despite this i can walk into my hardware store (san francisco, ca) and buy it.

I can almost guarantee that the cans are not in fact compressed co2. Unless you are purchasing a regulated compressed gas cylinder (big, thick walled, 50lb) you are actually using an aerosol. The liquid coming out IS very cold, but it is due to expansion cooling. Force a volatile liquid like butane or propane through a small opening in an area where it can freely expand. It will flash off, removing a ton of heat. This is essentially how your freezer at home works, except it recycles the gas.

junkelsplitsy (author)timbit19852013-11-14

Agreed. Thermodynamics, man. It's all about the enthalpy, baby.

jfr5dh (author)junkelsplitsy2014-11-20

Words cannot describe how beautiful this comment is, and for it I thank you junkelsplitsy

You could stab someone with a screw driver too if you wanted, and you can still buy those.

pyrobossVII (author)2014-05-25


elkhuntr (author)2012-08-07

thats not liquid fuel

you're right, liquid fuelled rockets carry a fuel and oxidiser that react through combustion to produce an explosion and generate thrust. the instructable should be renamed compressed gas rocket. overall it is a good tutorial though.

Eh...... not an explosion. A (hopefully) controlled deflagration.

3DMHuff (author)2011-10-17

I can't find them anywhere either.

Win a contest no mater how small.

shaneomacmcgee (author)2009-05-19

might wanna wear leather/rubber gloves for this; you can easily get frostbite if you get sprayed with that stuff.

True That!!! I got it onto my finger and it hurt sooooooooooo badly! That finger was numb for days and skin fell off!! Also never shake the can!! I did and frost appeared on the outside of the can! (actually it might not be frost, but the can was very cold)

Cheezpaper (author)Pizzapie5002010-07-13

Didn't hurt that bad for me... And it definitely didn't cause any damage after spraying my finger for 10 secs.... You're probably just overreacting.

Pizzapie500 (author)Cheezpaper2010-07-19

Did you get the white stuff onto your hand? What it does is expand and freeze. So if it gets onto your hand it'll stretch your skin (make it peel off) and it'll give it frostbite (make it numb).

c3ralki1l3r (author)Pizzapie5002012-10-02

my freind spray some in my mouth D:

Moofish (author)Pizzapie5002012-02-25

My doctor used this stuff to remove a wart on my hand, even though local anesthetic was applied to my hand, it still hurt like crazy.

Kasm279 (author)shaneomacmcgee2011-05-09

And here I am turning the can upside down to freeze stuff :P

jmontgomery3 (author)Kasm2792011-06-05

That is how I kill spiders around my computer.....

stefanslayer (author)2012-03-12

>:D rocket

GASSYPOOTS (author)2012-03-01

dude take a pen take the end cap off and stick the nozzle in it and fire XD

hamgravy (author)2009-06-30

ugh in california you have to be 18 to buy a can of the compressed!

An Villain (author)hamgravy2011-04-04

In california you can't own a knife with a blade over 3" or a magazine with a capacity over 10 rounds. That's modern americans for you, caring more about celebrities than, just about everything else unless it is "dramatic," or "popular."

Phade (author)An Villain2011-07-07

That blade thing is completely false. You can legally have any length blade you want, it's just illegal to "conceal" fixed blades.

drozzle (author)Phade2011-07-12

You are also false. You can own a blade of any length but you cannot carry one folding or fixed over 3 inches long.

KevinAlien26 (author)drozzle2011-08-17

If your under 18 u can carry a knife no bigger than the palm of your hand

Phade (author)KevinAlien262011-08-27

If you guys don't know what you're talking about don't post. In California it is legal to carry a folding blade as long as you want, same goes for fixed blades but the fixed blade must not be concealed.

KevinAlien26 (author)Phade2011-08-27

I didnt say anything about fixed or concealed or anything o that sort. Just thought I'd let you know what the security gaurds at my old high school told us (California) so no need to get mad bro :)

Moofish (author)KevinAlien262012-02-25

In Australia, if you don't carry a knife around with you, then you'll get raped by dropbears.

goeon (author)hamgravy2009-07-02

there was a case where kids were inhaling the air and getting high off it

IceAnubis (author)goeon2011-05-08

I can understand the fear... I'm a resident advisor in my school, and I found the corpse of a guy who inhaled the stuff until it killed him. Not fun.

goeon (author)IceAnubis2011-05-12

Damn. Thats... terrible

Wesley666 (author)goeon2010-05-02

Ya, and they died.  It has refrigerant in it which is heavier then air and no oxygen gets to your lungs and you die.  Kids can still buy it in Canada though! :D

MrMadmonkey4 (author)goeon2010-04-12

I still hate those kids

goeon (author)MrMadmonkey42010-04-12

 Heh Heh Heh

Redgerr (author)goeon2009-07-17

many of them infact... there are some places(if i remember correctly) where you can get it though because its 100% oxygen(or somthing), they are more expencive and last shorter

goeon (author)Redgerr2009-07-18


knektek (author)hamgravy2010-04-26

get it off ebay with ur dad's account.

nof-z (author)2011-11-02

@shadow123456: and THAT is why you build a hand held launcher!

TheOmegaGears (author)2011-11-02

do any of youse still have a hand

shadow123456 (author)2011-10-23

one blew up in my hand almost tore my finger off

jake4a4 (author)2011-02-08

I found a huge can at walmart that doesn't do anything if you spray yourself as much as you want.

KevinAlien26 (author)jake4a42011-08-17

Don't see why you'd spray yourself in the first place?

Ariskis (author)jake4a42011-02-18

It depends on the type of the can and chemicals inside. If you can find that brand, let the author know so the builders can try it out.

Lord Jon Bigglesworth (author)2011-08-14

I love how there is a whole conversation of replies to the comment: "Be careful or you can get frostbite."

yoshie257 (author)2011-08-13

I put random eletrical tape on the grey part and spray painted it black then removed the tape its like a tiger

mrwaffles2 (author)2011-04-05

how do you make the wings i dont get it

deobomb (author)mrwaffles22011-07-17

you fold the tape into them

bendog38 (author)mrwaffles22011-04-16

watch the vid

alexmg2420 (author)2009-03-04

Wouldn't inverting the compressed air can cause the refrigerant to come out as a liquid instead of air+gaseous refrigerant, as it should with a correctly positioned can? (Rhetorical, I know for a fact that it does.) Does it affect the rocket's flight?

About This Instructable




Bio: Working my dream job in the Telecom industry, so chances are, i'll never have time to respond to comments or messages, nothing personal.
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