a: A piston ~
b: solid coffee can
What: "The pistons are like solid coffee cans that go up and down in the cylinders. When they go down, they suck in air and fuel. When they go up, they squeeze that stuff to one eighth the size, then that mixture gets ignited by the spark plug. There has to be a gap between the pistons and cylinders so it can slide freely, but that gap would let the mixture leak past the piston and become useless as far as generating power is concerned."
Useful?
Writer: caradiodoc
LCC:
Where:
Date: Oct 3 2013 6:40 PM
# 3810 Critique Analogy