The journal bearing on the rotor move at a third of the surface
speed of the crank snout bearings correct?



Rob Woods

Not sure about that. The RPM is one third but the rotor bearing
is larger in diameter.

Paul Lamar

The relative rotation causes the rotor/journal bearings to see 2/3 of
the shaft rpm. That is, for each 3 rotations of the shaft, the rotor
rotates 1 time in the same direction. So use 2/3 of shaft rpm times the
circumference of the bearing surface to get the surface velocity of the
bearings.

Victor Roberts