Ancient Aeolipile -steam engine, and magnets for good measure…
The first steam engine was invented by Herron of Alexandria around 150BC (actual date is unknown -- that whole Alexandrian library arson thing :/ and books disagree on dates). The history channel (or was it discovery) called this person Mechanos - I'm not sure where that name came from, but it fits :PSo basically, it is a sealed pressure vessel with steam outlets. Hot steam is pumped in (or generated within) and the steam outlets provide a torque based on their perpendicular component to the radius of rotation. You also need some sort of bearing to allow for rotation ;)
Well, pressure vessel could be a fancy name for soda can....
You'll need:
1 Un-opened soda (or other) can
A few feet of fishing line or other thing string
Awl or other hole punching device
4 tea lights
Two magnets and two ball bearings :P
Videos on steps 1 and 3 ;)
By: trebuchet03 Source: Instructables.com
