As Range Rider states One11 has it.
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The aircraft was designed and built by the Fiat subsidiary company Costruzioni Meccaniche Aeronautiche (CMASA).
On the 10 April 1939, shortly after the success of the Heinkel He 100 V8, Manlio Stiavelli, the highly talented chief designer of Fiat's subsidiary company Costruzioni Meccaniche Aeronautiche, presented his CS.15 design (Corsa Stiavelli), an all-metal mid-wing monoplane of low frontal drag, with its cockpit located a long way aft and integrated into the fin. The aircraft was to be powered by the Fiat A.S.8 engine, designed and developed in Italy during the early years of WW2 but was not intended for combat use.
The A.S.8 was a V-16 design with individual cylinders and 45 deg. between the banks. Bore and stroke were 140 X 140mm giving a swept volume of 34.5 litres. As with the 24 cylinder A.S.6 seaplane engine, the A.S.8 was designed to turn counter-rotating propellers.
The purpose of the CS15 was to capture the world air-speed record outright. Windtunnel measurements had indicated a potential maximum speed of 850km/h at sea level.
After Italy entered the war, on the 10 June 1940, work on the machine continued at half pace, and after the armistice on 8 sept 1943 the project was stopped altogether. Little is known of the fate of the aeroplane which was almost finished.
Only the Fiat A.S.8 engine survived and is reported to be displayed in the Italian Aviation Museum at Vigna di Valle.
I should imagine it would have been a hell of an aircraft to land
You have control one11.