Rolls Royce Merlin Two stage Two Speed Engine Maintenance Manual

The Merlin two-stage, two-speed engines covered by this publication are of basically similar construction and are of the geared, 12 cylinder, upright V type with liquid-cooled, two-stage, two-speed, supercharger and have two pressure-liquid cooled hanks of six cylinders located on the upper side of the crankcase with an included angle of 60 degrees.