When you square the bore you get the area of a square (w X L). When you multiply that times .7854 you get the area of a circle. When you multiply that times the stroke (height) you get the area of a cylendar. When you multiply that times the # of Cyls, you get the displacement of the engine.
Whe you use the PI formula you get the area of a circle by taking the radius R, square it and multiply it by PI.
Whe you use the PI formula you get the area of a circle by taking the radius R, square it and multiply it by PI.
