Originally Posted by
BenLand100
I'll never see this again, so if you have more questions, catch me on IRC
1) Electrolyse water into hydrogen oxygen mixture (this can happen in the 'base' of your rocket) google is your friend.
2) Have rocket mounted on a ignition tube (kind of like a nerf gun, pressure powered).
3) Ignite hydrogen and oxygen mixture with a spark (disassemble one of those gun style lighters with the clicky piezo sparker) (be careful not to make a bomb).
4) Watch as people jump from the sound of the blast, but not as high as your rocket just went.
5) Good luck finding the rocket
As far as electrolysis goes, a handful of D batteries should have plenty of voltage/current to do the whole process in around 10 minutes tops, so it's definitely portable. Bonus points for not making chlorine gas and making everyone sick (seriously, google this stuff). I've done this before, works nicely. Also, very thick graphite rods (like, from inside a wooden pencil, the 2mm stuff or greater) makes fantastic electrodes that won't electroplate away during electrolysis.