In a message dated 2/21/03 9:23:24 AM Eastern Standard Time, PeterAra@MSN.COM
writes:
<< I don't understand how the wrist
pin clips can be compressed by the movement of the piston. >>
The clips really would not compress from combustion pressure, but might close
up from inertia acting on the mass of the clip end.
Tie a weight to the 0" end of a yard stick, hold the yard stick at the 34"
mark, make sure the numbers are facing up and the stick is parallel to the
ground. Move your hand in a up and down motion. The mass on the 0" end of
the stick will lag behind your hand motion causing the stick to flex. The is
the simulated mass of the eye portion of the snap ring with the opening
facing the cylinder walls.
Now take the same stick, hold it horizontally with he weight towards the
floor. Move your hand in a vertical motion. The weight will follow your
hand motion without flex. This simulated the snap ring opening facing the
crankshaft.
In theory the snap ring eye would react similarly when the acceleration/
deceleration forces of the piston exceed the compression force of the snap
ring. This is all a moot point if one uses Spirolicks.
Harold
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