A series of tests was made with rings ranging from 2 3/4 to 16 1/2 in. ID and at journal speeds up to 4000 fpm. Correlation of the results provides means for calculating ring speed for any journal speed. Oil viscosity, ring weight and diameter, ring immersion, and journal diameter are taken into account. From this calculated ring speed, oil delivery can then be estimated from equations incorporating the effect of oil viscosity and related operating factors.

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