A piston is a plunger, or a plug that moves inside a cube, a cylinder. The piston diameter is the diameter of this plunger/plug. It's a tiny bit smaller than the diameter of the cylinder the piston moves in.
diameter
depends on your definition of "smallest" depends on your definition of "smallest"
4"
Diameter of the piston head.
You reduce the diameter of the small piston. Or reduce the diameter and increase the travel of the small piston if you want the large piston to maintain it's previous range of travel.
If the size of the piston is increased, the power will increase. If it is decreased, the power will decrease.
A 1/2 diameter piston moves 10 inches with 30 lbs force how far will it move with 6 inch diameter piston and how much weight will it lift
Someone told me a micrometer?
9.4247 cubic inches
bore is the diameter of the piston and stroke is the length the piston moves in the cylinder.for example if bore x stroke is 1x3 then 1 is the diameter of the piston and 3 is the length of the cylinder.if bore is greater than stroke then it is a short stroke engine.
this is the diameter of the cylinder hole in the engine block for the piston
A pair of outside micrometers is the most accurate.