First appearing in 1931, the S.66 prototype was a larger development of the S.55 accommodating 14 passengers and powered by three A.22R engines. The Savoia-Marchetti S.66 was powered by three 750 h.p. FiatA 24R engines. Each of its twin hulls could seat up to nine passengers, while the cockpit was in the wing centre section.
Production aircraft were fitted with 522kW Fiat A.24R engines, raising accommodation to 18. S.66s entered commercial service and at least one was taken on charge by the Regia Aeronautica.
Around 25 were built.
Max take-off weight: 10950 kg / 24141 lb
Loaded weight: 7450 kg / 16425 lb
Wingspan: 33 m / 108 ft 3 in
Length: 16.65 m / 55 ft 8 in
Height: 4.9 m / 16 ft 1 in
Wing area: 126.7 sq.m / 1363.79 sq ft
Max. speed: 238 km/h / 148 mph
Ceiling: 5350 m / 17550 ft
Range: 1200 km / 746 miles