rocket fuel

Which is better?fizzy stuff or milk with chocolate.

Posted by nfk11 8 years ago

How do you make a pyrogen fuse?

I need to know how to make a pyrogen fuse to light off I - 161 motors in my rockets.

Posted by sam.greenwald 8 years ago

whats up

Whats up every one

Posted by apple is cool still 7 years ago

Rocket Launcher

Alright u guys, prepare to be blown away by my bottle rocket launcher! Heres a sneak peak picture!

Posted by Kendallkip 10 years ago

LDRS (Large Dangerous Rocket Ships) Rocket Competition hosted by Kari Byron

I just finished watching Kari Bryon hosting a Rocket competition on the Science Channel in Lucerne Valley California I Missed the initial showing on July 5th.   But they seem to be replaying it now and then (I saw it on July 10th, at 10 PM EST

Posted by Goodhart 8 years ago

Baking soda/vinegar rocket

I recently made a baking soda/vinegar rocket and I wondered if I should post it.It uses 1/2 pipe and a bottle.I was wondering whether or not to post it.Please tell me what you think.

Posted by bylerfamily 9 years ago

ultimate water rocket

I need help to build a water rocket that when it reaches the highest point a device for making the fall slower like the back pack of the skydivers something like that so please i will upload a video and give you credits so please help!!! o and remember it has to be cheap for a 15 year old budget

Posted by raytone 11 years ago

Gs to Speed Converstion

I am looking for the math equation that converts G load to speed using Arduino (  I am building a high power rocket data logger/controller. I need to know the speed by using accelerate of the bird. Yes I might be able to use GPS info, but at super sonic speed GPS can not keep track of the speed. The bird is a 2 stage bird. I want to stage when about 40% of the speed has bleed off.  Thanks Rocket Nut

Posted by Rocket Nut 1 year ago

Hi, I got some questions regarind K'nex Sets.

Yeah, I've been looking into getting some K'nex roller coaster sets, I'm planning on purchasing them off ebay, and I would like to make sure the sets are compatible if you know. Is Shark Run Compatible with Screaming Serpent or Rippin' Rocket. I know that Screaming Serpent and Ripping Rocket are compatible (I am not referring to the cars for the tracks, but the track parts them selves.)

Posted by Champion_Mark 10 years ago

Help with multistage balloon-tipped water missile

I'm designing the perfect water weapon of mass soakage-the super water missile, and I'm shifting my attention to multistage water rocket thrust systems. My finished product will hopefully be able to reach high altitudes, acheive moderate horizontal distance, and either drop many water balloons over a specified target area, or be tipped with a very large water balloon for a "wet impact" (very wet). I don't know how multistage water rockets operate though, and there are no instructables on how to build them. I searched Google, and all I got was pictures. No DIY's, how-to's, or tutorials. Could anyone tell me (or better yet-show me) how to make a multistage water rocket-or at least how they operate?

Posted by MattGyver92 9 years ago

What would you do in space?

If you could go to space for 3 days and have a large room to do what ever you want in. What would you do?

Posted by ry25920 10 years ago

additional tech

If we send it up then should we put any extra tech? by this i mean in my design im working on i have a altimeter to see how high it flys and a gps tracker for recovery and to see the flight path also should there be a camera added?

Posted by shabaki 9 years ago

wow i can't believe this!

So i was listening to the news yesterday so orlando had this shoes for guns thing. so you give your gun for a pair of shoes or $50. so then this one guys gives a 4 foot surface to air missle launcher for a pair of shoes but of coarse it was no questions asked. well i was just wow!

Posted by Easy Button 11 years ago

Bacon and rocketry, in perfect harmony!

Watch this. Love this. Now. (Caution, some naughty words, so turn the volume down if you're at work.  If you're at school, wait until you get home to watch it.) I saw this originally on Rather Good. Beware, that link is definitely not safe for work. But, then, as I was posting the above video, I saw this video being tweeted by gmjhowe. It's nearly as good, but ten times longer... You know, I think both videos say exactly the same thing...?  

Posted by Kiteman 6 years ago

Water Rocket Launchers

Water rockets are fairly new to water warrior technology. To reduce our carbon footprint, water rockets are built using plastic bottles. This forum topic talks about the operation of standard water rockets and launchers, how they can be used in a water war, construction of water rocket launchers, rockets, and add-ons like water balloons on the tips of rockets, ammo clips, and grips as well.

Posted by MattGyver92 9 years ago

Water rockets

Does anyone in instructables make water rockets? We seem to not have a great deal of them. If you like water rockets, please join

Posted by starwing123 9 years ago


Water rockets! Who doesn' t love them. Cheap, easy, safe, fast....

Posted by comodore 10 years ago

knex rocket luncher

I made a knex rocket luncher. need moding by me so pictures of the gun will not be released. right now the gun only shoots the rocket 10 ft. below are pics of the rocket. the gun has the handle and trigger system of the knex cannon. the barrels are similar.

Posted by dsman195276 10 years ago

Model Rocket sabotage

I need a way to sabotage a model rocket,extra points for explosions,house hold objects,undetected,funny,and relyablity

Posted by MajorBromley 8 years ago

Kid pulls tooth out with a rocket

This kid wanted to pull out his tooth his way and that way happens to involve a rocket. So rocket + string + tooth = one fast extraction. Check it out. via Geekologie

Posted by fungus amungus 8 years ago

water rockets

Would anybody like me to post a Instructable showing how to make a clark cable tie water rocket launcher look at this image for a example;

Posted by rocker9455 10 years ago


I have an old gunpowder rocket lying around in the garage, I am debating whether or not to dig it out. It is a fairly simple thing if I remember correctly, only 2 stages and the payload has a parachute for landing. I would like to know if anybody is interested in seeing a video / slideshow / instrucable on it? While I'm there I might find my old water rocket valve. And if I'm feeling really bored, I might make my own rocket and charges :-)

Posted by DELETED_zoltzerino 8 years ago

General Ideas

This forum is to discus general ideas for the project

Posted by oscarthompson 9 years ago

Accelerative problem...

Ok I'm in the planning stage of a secret project that is going ot be very risky if it isn't right, I need to accelerate ~100kg from ~20km/h to ~100km/h (I gave it all metric to help) over a reasonably short period of time, any improvement on 100km/h is welcome because I've done this without rockets in the past. Can anyone give me any idea where to get rockets that would be of suitable power, the largest estes rocket peaks at 25N of thrust and falls to 10N of thrust for only 2.5s after this, 10 of them would cause an acceleration of 1.41666. m/s2 which isn't much use to me. Unless I did my maths wrong, it's been a good while since i've done anything like this... Basically I'm looking for thrust and alot of it, preferably from something inexpensive but on this one I wouldn't mind paying a bit... Also I did look at the homemade candy rockets but I wasn't sure I'd be able to achieve the amount of thrust safely...

Posted by killerjackalope 10 years ago

Recovery idears

Does any one have any idears for the recovery? Or have made an instructable?

Posted by oscarthompson 9 years ago

Copenhagen suborbitals

Don't know if this is old news on these forums but I stumbled upon these guys in the Danish news the other day, who might just be among the coolest people on earth. They're artists / inventors / engineers (so makers I guess...) who after having built several homemade submarines decided that the bottom of Copenhagen harbour was getting boring and set out to build their own rocket for suborbital spaceflight, planned to reach a height of 120 km before descent. Launch date is some time 2011 with one of the constructors as the first passenger.There's more at including some very nice videos of booster rocket testing...

Posted by snotbot 9 years ago

Stig flies!

If you have heard of The Stig, then you will enjoy this video all the more...Link to Windows Media clip.Enjoy.

Posted by Kiteman 8 years ago

Rocketry Challenge

I don'e know if anybody's seen it yet, but oscarthompson has had a grand idea: a water rocket challenge to mark the 40th Anniversary of Apollo 11.He has started a group for people who want to work together to put together a scale version of a mission to Mars - three-stage launcher, controlled landing, the works.He has put together a rough plan here.Go. See. Partake.

Posted by Kiteman 9 years ago

Rockoon Project

I've seen many high altitude balloon projects and many rocketry projects on the web.  These seem to be pretty established hobbies. The I got to wondering if anyone out there had ever heard of any amateur rockoon projects? If you haven't heard of a rockoon, it is a combination of the word "rocket" and "balloon".  The concept is that a balloon is used to tow a rocket to a high altitude and then lauched. When I've searched around, most of the references I find are to the use of rockoons by Van Allen (of radiation belt fame)in the course of his research back in the 1950's.  The only thing close to anything like an amateur attempt that I found on the web was by a group called JP Aerospace back in the 90's. I'm not necessarily contemplating any such project myself, I just find it a fascinating possiblity.   And like the many amateur high altitude balloon lauches and high power rocketry, it is amazing what people put together.  I wonder if it would be feasible for a high altitude balloon plus high powered model rocket to ever technically reach the internationally recognized altitude of ~100km considered "outer space". I know that both high altitude balloons and high powered rocketry have their own FAA (or equivalent agency) approval hoops to jump through. Perhaps they just wouldn't allow it, or it would be so much red tape that no one attempts it. Even a low altitude rockoon, of a small ~3ft diameter weather balloon towing a standard model rocket would be an interesting project, for the technical challenge of pulling it off successfully. Anyway, if anyone has ever heard of amateur rockoon attempts or your own musings on the topic, I'd be interested in hearing about it!

Posted by LargeMouthBass 5 years ago

Poseidon- High Powered Modified H2O Rocket

Just thought I would give those interested a sneak peak at the Poseidon's main booster module.Construction-12 x 1.25L Soda bottles spliced with external sleeves using Sikaflex 11FC.The Poseidon's booster module is not yet complete, it has another 7L of capacity to be added. The booster will then be combined with several other modules before Poseidon is ready for launch.You may also like to note the quick attach/release fin system. They are saw toothed sign holders normally found in stationary shops. They allow the fins not only to be attached perpendicular to the body, but also provide a reproducible fixing method.Although this is not my preferred method of splicing, has put together an excellent tutorial which can show you the principal. My method (which I DID NOT create) involves shrinking the inner bottle with our curled lip. Air command in that tutorial reduces the outside sheath from a larger capacity bottle to suit. The method I use does not call for the use of different sized bottles or a blow torch, just boiling water. Air Commands Splicing

Posted by Lftndbt 9 years ago

rocket help needed

My son would love to build a rocket, or thunderbirds/star wars machine. does anyone have any designs or can you guide me to one. many thanks

Posted by zacarnold 9 years ago

Knex Rocket Launcher: Updated

I finished this gun yesterday and here are a few pics of the final design. It shoots around 30 feet and I have put on a rocket sight and a rocket holder compartment.

Posted by Loosewire; SOE Operative 11 years ago

How To Build A Rocket

A few years ago i came up with the idea of strapping a rocket to a merry-go-round. the little ones in playgrounds not the big ones with horses and stuff. i've been trying to find some sort of rocket hobby community since then but there are surprisingly little. and not a whole lot of instructables on rockets with enough power. so tips? hints on how to at least get started?

Posted by zixster 4 years ago

Turbo Boost Rippin Rockets question

I was wondering if anyone knows if the Turbo Boost Rippin Rockets engine that propels the cars works with other/all K'Nex rollercoaster cars and tracks?   Thanks!

Posted by pghninja 3 years ago

Rocket Launcher

I need ideas for the firing system for a rocket launcher. I have some pictures of what i have built. But i do not have a firing system for it yet. Any ideas would be appreciated. This is a knex rocket launcher that used the Air Ball Tower tubes.

Posted by TeacherOfTheWays 11 years ago

Rocketeer Rocket Pack, Ghostbusters Ghost Costume, Headless Horsewoman

Rocketeer Rocket Pack Ghostbusters Ghost Costume Headless Horsewoman Lego Indiana Jones Costume Bloody Cut Dessert Easy Leather Punches Spike Through the Gut Secret Message Shirt Large Roller Stamp Lady GaGa Costumes Salsa Fresca Fiber Optic Fairy Wings iPhone Screen Protector Prop Pulse Rifle DIY Calligraphy - 82 2nd St. - San Francisco, CA

Posted by randofo 7 years ago

Hydrogen as a fuel?

It's easy to separate hydrogen and oxygen from water. If you mix them together it doesn't become water until it is burnt. In theory you could make a water rocket from gases. But in reality...

Posted by Princess_Mellow 10 years ago

a TRUE "handmade" rocket to reach the Earth orbit

.while I'm trying to start up a TRUE company (as explained in this Instructables thread) to develop TRUE "space hardware", I ask to myself (and to you) if it's possible to build and launch an hobby/handmade rocket to Earth orbitfor what I know, this goal was NEVER reached, so far, and, only the (well funded) company SpaceX has launched a privately-developed rocket to LEO (at its 4th attempt) last septemberwell, I've a suggestion to have more chances to succeed in this effort: just develop and build a (true working) SCALE-MODEL of an EXISTING rocket, insted of trying to develop a new rocket from zerothe "existing rocket" to scale-down could be (e.g.) the SpaceX Falcon-1 whose specs you can find here:, a resized "hobby rocket" (but able to reach the Earth orbit) could be 1/20th to 1/50th the full-sized Falcon-1 to send its second stage and a small (Sputnik-like) 20-50 kg. payload to LEO.

Posted by gaetanomarano 9 years ago

diet coke and mentos launcher

I was wondering if there was a controled way of launching a diet coke and mentos rocket. does anyone have any ideas

Posted by Brass bum 10 years ago

The Ultimate Water-Powered Rocket!

NASA and the Air Force Office of Scientific Research (AFOSR) have launched a water-powered rocket 1300 feet into the atmosphere!The rocket was actually propelled by a frozen mixture of "nanoscale aluminium" (isn't that "dust"?) and water, pumped in at the consistency of toothpaste and then frozen in place. The propellant is known as ALICE (aluminium and ice - convenient, eh?)Earlier this month, the collaborative team, Drs. Steven F. Son and Tim Pourpoint of Purdue, Rich Yetter and Grant Risha of Penn State, Vigor Yang of Georgia Tech, Harold Bell and Frank Bauer of NASA, and Mitat Birkan and Thomas Russell of AFOSR watched as the rocket soared high into the sky, to 1300 feet near Purdue University.ALICE is generating excitement among the researchers because it has the potential to replace some liquid or solid propellants. It is a promising propellant energetically. Theoretically, when it is optimized, it could have a higher performance than a conventional propellant. In addition, because of the abundance and easy handling of the raw materials, ALICE could potentially become the propellant of choice for missions leaving other planets, since it could be (relatively) easy to manufacture from local raw materials and far easier to store than cryogenic fuels. Story from Wright-Patterson Air Force Base via Rocket Dungeon.Video found by Jeff-O

Posted by Kiteman 8 years ago

What are the restirctions/requirements to play with model rockets in your country?

I wanted to start again with an old hobby of mine and buy some rocket motors and one or two easy rocket models. Just for the fun of seeing things to fly high and come down slow you know? Depending on which country you can call your residency now you might luagh about what happened to me: I went to first model building shop I could find nearby in my Yellow pages. Of course that had no clue about rockets, not even remote controlled cars as they only build build models for multiplayer board games. Next shop was selected a bit better with a focus on all things remote controlled. Here I was told that only a few shops actually sell any rocket related stuff due to the tough legal requirements of storage, handling and selling - WTF?? (excuse the language!) But at least I got an address for a shop that would be abe to help me figuring it all out. Last but not least I finally entered a shop filled with all sorts of model rockets, from simple to realist replicas of Saturn 5 engines. "Can I see your permit please?" "Do you have a club memebrship card stating you can buy engines?" "Can you provide the required details on your storage facilities and fire control system?" That were just a few of the questions thrown at me when I went to the checkout with 3 little rockets asking on where to find the engines and ingintion kits..... Turns out here in AU it is far easier to obtain a firearm and license than to get what you need to shoot a plastic rocket 100 or 200m high in the air.... Without being a member of a recognised model rocket club you won't have access to a legal launch area. Without your club permit you can't obtain a license required to buy a model rocket engine - yes we are taking about these paper tubes every kid uses.... Without the license, club membership and the required club permits you will never (legally) buy a rocket motor... To make things worse the 4 clubs I contacted only supply motors they buy to their members, at about 20% above market price of course and you won't get a card to buy your own until you are a member for at least three years... I already know in Germany and the US things are quite different but I would still like to know how exactly it works in your contry or if your face similar problems outside US and EU territory.

Posted by Downunder35m 1 year ago

Backyard Rockets Book on Sale Now

Ladies and gentlemen, we humbly present to you a book containing the instructions for creating rockets in the comfort and privacy of your own backyard. Backyard Rockets contains a compendium of devices that shoot, fire, explode, throw, toss, or propel. With projects like the vacuum-cleaner bazooka, you'll be flinging things into the air in no time. Mikeasaurus put this one together, so you know it's gonna be fun. Bonus for Pro members: you can buy the book at a discount from ThinkGeek. And if you're keen on launching things, we just so happen to be running a Launch It! Contest from May 27th to June 24th, 2013 (and probably again at some point, those contests are always fun.) Because you’re a longtime Instructables fan (an assumption I’m making since you’re reading our forums), you’re probably not the target audience for these books. You’ve seen the projects before, commented on them, favorited them, and know where to go if you need instructions. These are more for those of you whose parents don’t quite get what you mean when you talk about Instructables, who have a friend who’d love the site but isn’t really an internet person, or who know a camp counselor who is tired of all the tie-dye stains on their nice shorts. So buy a copy. Give it to someone you love. Or give it to someone who you think might singe off their eyebrows by failing to follow safety protocols when making backyard rockets, thus allowing you the chance to steal their date to the movies since eyebrows always beats no eyebrows unless you are Stan Sitwell.

Posted by wilgubeast 5 years ago

Project Progress

I will be updating my progress here of the project so you know if any of your mechanisms have been used or how its coming along.

Posted by oscarthompson 9 years ago

Does anyone want an extra jet engine from a bike that I crashed

 I crashed my jet bike and do not need a jet engine anymore) (Note: do not build a jet bike, as you will crash it in a short amount of time.)

Posted by bendog38 8 years ago

Water Rocket Launcher- High PSI twin rocket racers.

Ever wanted to know how to build a twin water rocket launcher? Have some expert advice on hand? Feel free to comment and help build a full metal, high PSI twin launcher. I am looking for assistance/advice you may wish to input. I was hoping to build a substantial base for launching multiple water rockets. It has a quad manifold so further expansion is possible. As you can see from the parts, it is very simple. I still need to add a isolating valve to stop water back flow into my pump (which will be located at the end cap, after the gate valve. The release mech has yet to be designed also. Australian gardena hose quick connects are the base for this rockets release system. I hope that is not too confusing. If it is, ask and I will clarify my babblings. Thanks for the assitance

Posted by Lftndbt 9 years ago

wrist rockets and sling shots

hey do you guys have any idea on what to do about ammo for my wrist rocket. here's the diferent ammo I need.huntingcheapexplosive/fire..... for funhere's the ammo I usetarget= chalk cut upinside the house= cut up nerf dartpost pictures of your slingshots and wrist rockets too! this guy is crazy

Posted by SorryBarry 9 years ago

Bottle Rocket School Project!

I managed to snap a picture with the camera on teh Macbooks we use, and upload it here, We launched it yesterday, although the payload didn't deploy, our rocket still went the highest. Approx. 100-200m. We're working on the exact height at the moment. I'll update this as the week progresses. :D BTW, FCREM stands for Freeking Coolest Rocket Ever Made.

Posted by bumpus 9 years ago

Potassium nitrate as a oxidizer in liquid fuel rocket?

Would potassium nitrate work as a oxidizer in a liquid fuel rocket?

Posted by WastelandWilly 3 years ago

Good News!

Good news! I have been seeing whether or not I will be able to make a model Saturn Rocket for the challenge. I did bottle rockets way back in 2006, but all the stuff, Including the ubertastic launcher, is gone now. Good news is, I have found a way to splice bottles, and tested it today. Works pretty good so far, and I will be making a full scale test rocket soon. I don't have my launcher that was super awesome, but I do have a small Clark Cable launcher, hand held version. I do plan for my Saturn Rocket to not only have an Instructable, but an Instructable detailing splicing bottles, adding a parachute system, and adding a small package (in my case, the small lunar ship). If all goes well... I should finish before The end of the contest.

Posted by Kaiven 9 years ago