One significant difference was the incorporation of the camshaft and magneto drives into the propeller reduction gears at the front of the engine, rather than using a separate system of gears driven from the back end of the crankshaft; this allowed the overall length of the engine to be reduced as well as making the drive train more reliable and efficient.[7][nb 2] The drive for the supercharger was also taken off the front of the engine, which required a long shaft to run to its location at the back of the engine.[8]