Petrol Hover Mower

a lawnmower that cuts grass with blades that spin round, and that is held slightly above the ground by a current of air below it.Designed by Karl Dahlman in 1964, a hover mower works by creating a cushion of air between the lawnmower and the lawn. This cushion of air raises the lawnmower from the lawn allowing the lawnmowers blades to cut the grass.The crankshaft is located on the bottom of the engine (crankcase) and rotates the blades or wheels of the equipment you are using. When combustion occurs in the engine, it forces the piston down the cylinder, which rotates the crankshaft, which makes your mower blades turn.