for comparison with its Macchi M.5 flying boat fighter, which went into service that year and operated successfully over the Adriatic Sea against Austro-Hungarian forces during World War I.

The M.6 was identical to the M.5 in most respects; like the M.5, it was a single-seat wooden biplane flying boat fighter with plywood and fabric skin, powered by a 139-kilowatt (187-brake horsepower) Isotta Fraschini V.4B engine mounted on struts above the hull and below the upper wing, driving a pusher propeller.

Its cockpit was beneath the radiator, it was armed with a single 7.7-millimeter (0.303-inch) Vickers machine gun, and its hull was of the same design.

[1] Comparative trials were held between the M.6 prototype and standard M.5 aircraft to evaluate whether the M.6's revised wing cellule provided any advantage over that of the M.5 fighter.

[2] Data from Green, William, and Gordon Swanborough The Complete Book of Fighters: An Illustrated Encyclopedia of Every Fighter Aircraft Built and Flown, New York: SMITHMARK Publishers, 1994, ISBN 0-8317-3939-8General characteristics Performance Armament Notes: