10-12-2021, 07:35 PM
(This post was last modified: 10-12-2021, 07:47 PM by Bob Culver.)
Crankcase compression two strokes of reasonable size and output invariably have roller bearings whcih require only an oil mist.
With the original Seven scoops I wonder what happens to drips which arrive at a larger radius than the hole. Does the impact propel them in, or does centrifugal force fling them to the wind? With a pronounced edge there would seem the possibility of a pocket of moderately compressed air being carried around. Maybe that is the function of the two curious holes on top of the big end. Or are these also inlets as thre mast be droplets everywhere?
If the oil arrives at scoops in a solid stream fine but if it arrives as scatterd drops could make some difference. Anyway the Mays mod appears to involve a lerge unvented scoop so seems the oil wins. (I have eased the drilling somewhat on the inner side)
With the original Seven scoops I wonder what happens to drips which arrive at a larger radius than the hole. Does the impact propel them in, or does centrifugal force fling them to the wind? With a pronounced edge there would seem the possibility of a pocket of moderately compressed air being carried around. Maybe that is the function of the two curious holes on top of the big end. Or are these also inlets as thre mast be droplets everywhere?
If the oil arrives at scoops in a solid stream fine but if it arrives as scatterd drops could make some difference. Anyway the Mays mod appears to involve a lerge unvented scoop so seems the oil wins. (I have eased the drilling somewhat on the inner side)