Instructables
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In this instructable I will show you how to build a Black powder rocket and how to put it onto a car.
This will also outline other things you can do with these rockets
There is always the possibility of using other types of fuel such as the sugar and KNO3 fuel in the same way
 
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Step 1: Materials

You will need the following.

Rocket tube/motor;
An A3 piece of paper
PVA (white) glue
Black powder - http://www.instructables.com/id/Making-black-powder./
Bentonite clay (as above)
A 15mm dowel with 4mm bore (bore optional)
A spindle with 4mm bore extension (optional)
and tube, and ramming device could be used. or if you want you could remove 1/2 the fun and buy your own pre made motor?!?!?!?

Car;''''
Toy car
Straw
String
Tape

Of course you dont have to make some BP you could buy some, or already have some. but the Black powder on my other instructable is well suited to this project and will burn at a good rate.

Step 2: Rocket Tube

Cut your piece of A3 paper into 6cm wide strips. T
ape the end of one strip on the other end of your workbench than you are, and apply PVA glue from the far end to 4cm from your end. Place dowel on your end of paper strip and tightly roll to the end.
Take off the tape at end a glue last bit on, and then take out dowel. Repeat with all strips.
Leave to dry for at least 2 hours before ramming so they have time to harden, but they reach their hardest over night and after this time they work best.

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bp rocket engines are very legal in the US. and they are 100% allowed to leave the ground! tht is what they are made to do! i think the law has a bigger problem with people using bp rocket engines in weird ways like, maybe taping them to a car and lighting them on the ground:) lol. but i think its safe to say you can make and do most anything with bp rocket engines and youll be fine as long as there is no damage to property or people:)!
augur453 years ago
eek... good instructable, BUT...

When working with, ramming, black powder, use non-sparking tools... (brass, plastic, wood...) and gloves (welder's?) to provide at least a little protection for hands in case of explosion, and a blast shield of some sort to protect face and body.

Light dampening black powder will provide protection from accidental ignition. Of course, the completed motor will need a lot of time to totally dry before it can be used... perhaps a light bulb in an insulated box as a drying box (looking for maybe 100degrees Fahrenheit). (Use someplace where an explosion won't cause damage or a fire of course.)

Be safe....
Eric-the-halfa-bee (author)  augur453 years ago
Although I have no problem with your extra caution, I will say this: The Meal Powder I use to make these motors is not pressure sensitive, that is it won't ignite from ramming. Using non Sparking tools is always a good Idea. I manage with the wooden tools I have. I have never had any trouble with leaving the motors to dry. If you see my Black Powder making instructable you will see that in that process I allow the individual elements to dry separately before mixing them, that way there is no chance of ignition. For example, in the past I have dried KNO3 in the oven at a very very low heat to dry it out because it was fertiliser quality material.

Thank you, however, for the cautious procedural advice that you have given. There is no problem in being extra careful with these methods.
I know I may rant about safety, but I also know there are some youngsters that read these. I don't mean my rants as criticism - I just throw them in if they seem to have been overlooked to ease my own conscience.

Years ago, there was a company that provided instructional manuals for making black powder and black powder rocket motors. They also sold heavy paper tubes in standard motor sizes for making the rocket motors and other supplies...

The cautions I gave were the ones they gave...

I have seen pictures of little kids (like 5 years old) in South America and Mexico mixing black powder ingredients in cloths for fireworks. A sheet about 3 or 4 feet square is held at each corner by a child and the ingredients are rolled back and forth, corner to corner by lifting one corner of the sheet at a time. And these are not small amounts. They look like 1 to 5 pounds at a time. The children are protected only by the fact that the powder is lightly dampened - I presume to inhibit ignition by static electricity spark.

(65 and still in possession of all my fingers, thumbs, eyes and eyebrows - even though a few things went wrong - like when a circular saw blade tooth broke off.)
notker6 years ago
Nice instructable I like it!_
But one question: Can I replace the BB with something like natriumchlorate with sugar?
I knew that natriumchlorate with sugar is very dangerous but i work with it since one year...
heimo notker5 years ago
The English for natriumchlorate is sodium chlorate I am not sure if it is one word or two no matter Natrium is the Afrikaans word for Sodium maybie even dutch or Hollands ? these languages are very similar to each other
Lamppis heimo5 years ago
Natrium orgins from Latin.
Eric-the-halfa-bee (author)  notker6 years ago
I don't have experiance with that particular combination, but if the mixture burns up the tube then it will give out thrust for the rocket. but if that mixture burns too quickly it probably won't work.
doesn't work so good
it'S better with red phosphor
Verbinguden5 years ago
"most countries/states ban these unless they stay grounded". That's like saying a bird is allowed in our state BUT HE CANT FLY! haha, nice instructable.
astro boy5 years ago
lol had an idea to strap it to my knex roler coaster!
PhotoPeng7 years ago
I like the idea. If you're going for top speed, you could use fishing string, and a drop of WD-40 on each axle of the car. Unless the car is plastic use vegetable oil.
Eric-the-halfa-bee (author)  PhotoPeng7 years ago
i did test it with fishing line, it worked very well, i hadent thought about axel grease but that would reduce friction. the main problem with theese is that the car doesnt have much traction. some type of spoiler or maybe two guidlines instead of one
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flowers of sulfur and sulfur is the same thing !!! try melting some flowers of sulfur and you will believe me if you buy flowers of sulfur from a pharmacy it will be pure
I know that sulfer is preferable, but if you can't find it flowers of sulfer is easily obtainable at garden stores, but u will need to de-acidify. (see my Instructable)
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the brand i used is nichol's. and it isn't that big, only 1kg
I noticed the string is pulling down on the straw. If you were to add a block at each end under the string the same height it will give you a straighter line. You could see if the fishing string would fit through one of those small coffee drinking stir/straws, and glue it to the bottom. (spoiler)You can try a wedge under the back of the rocket so it points up a little. Using a small piece of folded paper. That should give you some down force. yeah, Axle grease would add friction, but it's made for high pressure/higher temperatures. WD40 would work better. My friend told me to recommend white lithium with teflon added. It seems super fast in the video, so Im not sure if it will be noticeable. Love the instructables, really got me thinking, Cheers
Eric-the-halfa-bee (author)  PhotoPeng7 years ago
re-directing the thrust is not the point, for that you could just mount on an angle) but creating downforce with a spoiler would be the answer. there is too much friction if actual rocket forces down.
zrocker5 years ago
Even better run it off a ramp with wings attached and try to make it land in a circle on the ground. If someone can do this and tape it (it must land close to the center of the target), I will make a video doing whatever you ask (as long as it is legal).
zrocker5 years ago
your videos are hilarious, you should do stand up, lol
lol "And in slow motion just coz i can!"
A good name6 years ago
You sort of copied this... Kipkay has the same thing... but his is with rocket motors.
Eric-the-halfa-bee (author)  A good name6 years ago
Kipkay actually only shows how to attach a motor to a car. You will find this one is a lot more in-depth and addresses construction and alternate uses. This instructable benefits the people who do not have access to commercial rocket motors.
Lol, it's still a ripoff but I see what ya mean... How do you make blackpowder?
Eric-the-halfa-bee (author)  A good name6 years ago
http://www.instructables.com/id/Making-black-powder./

this is the type for this application. Do not use gun grade BP.
twenglish16 years ago
how did you make the shell
Eric-the-halfa-bee (author)  twenglish16 years ago
The shell is of very simple and safe construction. The main body is a short tube of paper made like the motor casing, but has a larger diameter, inside the tube is a lightly rolled tube of paper holding Meal-powder (http://www.instructables.com/id/Making-black-powder./)
around the inside tube are stars covered lightly in Meal powder. the ends are sealed with cardboard and Hot glue. a fuse is put into the interior tube and the other end to the top of the rocket where the Fuel ends.
shell.bmp
oh and one more question where did you get the stars, i kinda have an idea but im just making sure
Eric-the-halfa-bee (author)  twenglish16 years ago
i guess you could buy them, but there are other solutions. you could scavenge them from fireworks, break up sparklers for bits. But I made mine. i cannot remember the way. But maybe look it up on the internet. it is just a hard, pyrotechnic mixture. combining KNO3 and methalated spirits wiht Meal powder. when it dries it will be fine.
yah thats what i was thinking ill give it a try thanks
thanks, great design
Mattrox6 years ago
where did you get your spindle or how did you make it?
Eric-the-halfa-bee (author)  Mattrox6 years ago
i got a smallish block of wood, and on that i put a cone of epoxy putty formed in a paper mould. then i drilled a hole in the vertex of the cone and inserted a nail with both ends cut off to the length i wanted, and glued it in place. you can also but them online. but this way works well.
thanks that helps alot. also is the cone at the back of the rocket neccesary
Eric-the-halfa-bee (author)  Mattrox6 years ago
the nozzle at the back really helps in the trajectory and evenness of the rockets path. it helps the rocket to fly straight or the rocket car to move smoothly. it is not necessary but because it is so simple to do, i always use it. For real rockets there is some very complex mathematics behind the perfect angle but you can use whatever you like.
Hawaii000006 years ago
How much is a pound of black powder.
Eric-the-halfa-bee (author)  Hawaii000006 years ago
make it with my other in depth instructable. and bear in mind that real bp will not work in these motors. you should follow my instructions for best results.\
http://www.instructables.com/id/Making-black-powder./
Make it. Here's the link to another for Instructable gunpowder. Some of the comments are very good, so check them out.
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