Macchi M.67
The Macchi M.67, was an Italian racing seaplane designed by Mario Castoldi and built by Macchi for the 1929 Schneider Trophy race. == Design and development == Castoldi based the design of the M.67, (a single-seat, low-wing, monoplane, twin-float floatplane), on that of the earlier Macchi M.39, which had competed for Italy in the 1926 and 1927 Schneider Trophy races, following the M.39's layout but strengthened to accommodate the 18-cylinder, 57.256 L (3,494 cu in), 1,341 kW (1,798 hp) Isotta-Fraschini Asso 1000("Ace") 1000 W-18 engine, a much bigger and more powerful engine than the Fiat AS.2 V12 fitted to the M.39.