Quelab (My local Hackerspace in Albuquerque NM), Had a project theme of "Hacking Chocolate" for the month of February. I'm allergic to eating chocolate, so I wanted to think of a use that was a bit more exciting than just watching others eat the stuff.
So I decided to experiment with making a chocolate (candybar) powered rocket engine. A quick googling showed me that I was remembering right that people do make Sugar and Potassium Nitrate rockets. (And even pixi stick rockets), so I decided to see if i could do it too but using a candybar! (you know how many calories there are in them Right?
Figuring sticking with a space theme, and avoiding complex compounds such as peanuts. That a Milkyway candybar was just the ticket. (turns out that was a lucky decision, more on that later)
Step 1: Materials,
You will need the following Tools
- A small scale
- A hammer
- A grinder (mortar and pestle like i show here, or a coffee grinder you don't plan to use for food again)
- An anvil or chunk of steel or other hard object to pound on
- A Domed head carriage bolt (I believe the head size of mine was 3/4" and it was about 4" long)
- A drill, with, 7mm drill bit. and a counter sink drill bit, (or a larger 1/2" bit will do too.
- A permanent marker.
You Will need the following materials.
- Some clay kitty litter (a few ounces of clean clay based kitty litter will do) this will make the fire proof plugs at both ends of the engine
- A MilkyWay Candybar, this will provide the fuel
- Some Potassium Nitrate (salt peter) (as pure as you can get) Oxidizer,
- some thin wall PVC pipe (about the same internal diameter as the carriage bolt head), cut it into 2.5" lengths
- some cannon fuse, or model rocket engine igniter.