25 ft. 4 in.
28 ft. 6 in.
The Macchi M33 flying boats were among the first monoplanes of the time. They had a relatively low-drag fuselage design.
Two Macchi M33 flying boats were entered in the Schneider Trophy race for 1925. It took place in the U.S.A.
Although the aircraft did not have engines as powerful as their competitors, Italy hoped that the design of the flying boat hulls would give them an advantage over float planes when taking off in rough waters.
Due to engine problems, one of the aircraft never got to compete. The second aircraft, flown by Giovanni deBriganti, finished in third place.
Only pontoon equipped aircraft would compete in Schneider Trophy races thereafter.