The SAI-Ambrosini SS.4 was an Italian fighter prototype developed in the late 1930s but never mass produced. The radical design for its day featured a canard-style wing layout and a 'pusher' propeller. Although intended as an air-superiority interceptor, the SS.4 never entered service because the design suffered from numerous faults which caused the prototype to crash-land, killing the test pilot (chief test pilot, eng. Ambrogio Colombo). The design, although unique, barely compared favorably to contemporary fighters, and the Regia Aeronautica decided not to pursue the design because of these shortcomings.
The engine was a powerful Isotta Fraschini Asso IX RC.40, a liquid cooled engine capable of 960 hp which drove a 3 bladed metallic propeller.
max speed 540 km/h,
stalled around 110-120 km/h.
length6.74m,
wingspan 12.32m,
wing area 17.5m
2Armament
SS.4 was armed with a 30 mm cannon and a pair of 20 mm
Source
http://en.wikipedia.org/wiki/Ambrosini_SS.4
