Bearing Loads on Radial-Engine Crankshafts

DETERMINATION of the approximate distribution of the loads on the main bearings of radial aircraft-engines, so that the bearings can be correctly proportioned and the stresses in the crankshaft can be more accurately calculated, is the purpose of this investigation.

Six radial-engine crankshafts were tested statically to determine the main-bearing loads. The results of these tests are presented in the form of tables and diagrams. General conclusions are drawn from these results.

A short method of calculating the crankpin-bearing load, which gives results in a convenient form, is included.