10 cylinder engine

For each bank of cylinders (1-10) on a crankshaft there is an unequal division of set angles so that second-order mass actions are almost completely evened out for each bank of cylinders. Set angles for two banks of cylinders are equal when projected into a normal plane for a crankshaft. Right-angle settings for the two banks apply on the crankshaft. An independent claim is also included for a crankshaft for a ten-cylinder internal combustion engine that has two V-shaped banks of cylinders each with five cylinders in a row.