ORIGINAL: old git
It refers to the fact that the cylinder axis is not in line with the axis of the crankshaft. It purported to reduce sidethrust of piston on cylinder wall during the Power? stroke, cannot remember exactly if that was so.
old git aka John L.
Yes, to reduce sidethrust on cylinder wall during the power and reduce friction between piston and cylinder wall, less oval cylinder of wearing.
There are 2 difference to reduce sidethrust
1. The cylinder axis is not in line with the axis of the crankshaft.
2. The wristpin not in center in the piston, connecting rod less in angle during the power. (To example in Volvo automobil car during 1970-80 model)
Jens Eirik