30-05-2024, 07:33 PM
Heres a picture of a slipper piston. I don't have the exact measurements, but the "full width" section above the gudgeon pin is only about 11/16 inches deep, i.e. about one third of the bore diameter.
If for example the bore was 3 thou bigger in diameter than the piston, it would be able to cant over enough to give about a 10 thou slope on its crown when just touching the bore at two points.
A conventional "deep" piston would not allow this much angular movement, but with a misaligned gudgeon pin/little end I guess the con rod would bend instead and be placed under stress.
If for example the bore was 3 thou bigger in diameter than the piston, it would be able to cant over enough to give about a 10 thou slope on its crown when just touching the bore at two points.
A conventional "deep" piston would not allow this much angular movement, but with a misaligned gudgeon pin/little end I guess the con rod would bend instead and be placed under stress.