Ambrosini Sagittario II
Aefer Sagittario II

From the initial Sagittario prototype, Sergio Stefanutti subsequently developed the Sagittario II, which made its maiden flight on 19 May 1956. Powered by a Rolls-Royce Derwent 9 turbojet, this more advanced aircraft was virtually a new design and of all-metal construction and built by Aerfer. The Sagittario II was the first aircraft of Italian design to exceed Mach unity when it reached Mach 1.1 in a dive on 4 December 1956.

Engine: 1 x Rolls-Royce Derwent 9 turbojet, 1633kg
Wingspan: 7.5 m / 24 ft 7 in
Length: 9.5 m / 31 ft 2 in
Height: 6.627 ft / 2.02 m    
Wing area: 14.50 sq.m / 156.08 sq ft
Loaded weight: 3300 kg / 7275 lb
Empty weight: 2300 kg / 5071 lb
Max. speed: 1020 km/h / 634 mph
Service Ceiling: 14000 m / 45950 ft
Range: 413 nm / 765 km / 475 miles
Armament: 2 x 30mm cannon
Crew: 1