Five MC.72s were built, MM.177 to MM.181. Not completed in time for the last Schneider Race. On Oct 23, 1934 this aircraft set a speed record of 440.681 mph, a record which still stands.
Italian Air Force Museum, Bracciano, Italy, Jan 2015
3000 hp Fiat AS.6 consisted of two AS.5 V-12s bolted together driving a contra-rotating propellers. The contra-rotating props eliminated the propeller torque reaction. For these high powered seaplane with the usual propellers the torque could be so severe that it would practically bury one of the floats. Some of these seaplanes even had a slightly larger float on one side. Needless to say, direction control could be a big issue. But with a big lake they did not have to go perfectly stright for the start of the take off run.
The rear V-12 drove the front prop and the front V-12 drove the rear prop.
