Quote:
Originally Posted by johnbuckley
"....oil tray that feeds the dippers begins to suffer from 'windage' above 3200 rpm..." What's windage .. not come across the term before ( sorry I'm a Limey which explains a lot!  ) |
Windage is the resistance from the air/oil mist that gets churned up in the crankcase. Think about the air being moved inside the crankcase by the pistons going up and down, and the oil draining back from the block passing though this turbulent atmosphere. And then you have the oil in the pan being churned up. So that air in the crankcase gets saturated with oil and becomes "heavy", causing resistance to the spinning crank. At least that's how I understand it; there's probably more to it than this.