The CR.20 "Asso" carried the Isotta Fraschini "Asso" engine of 450 horsepower mated to the airframe of the CR.20bis. Two-hundred four aircraft were produced to this standard from 1932-1933 (the variant regarded as the definitive CR.20 form). The CR.20 "Idro" marked a twin-float seaplane development of the CR.20 to which 46 aircraft were constructed. The CR.20B became a two-seat trainer / communications aircraft developed in 1927 and appeared in limited numbers.
Ultimately the line was adopted by several air powers of Europe - Austria, Hungary, Lithuania, Poland, Spain, and the Soviet Union (trialled). Paraguay five CR.20bis fighters for South America's part in the CR.20's history.
As finalized, the fighter form was given a length of 6.7 meters, a wingspan of 9.8 meters, and a height of 2.75 meters. Empty weight was 980 kilograms against a Maximum Take-Off Weight (MTOW) of 1,400 kilograms. Maximum speed was 270 kmh with a range out to 750 kilometers and a service ceiling up to 7,500 meters.
Armament standardized across all variants was 2 x 7.7mm (0.303") machine guns synchronized to fire through the spinning propeller blades. There was also provision to mount a additional pair of guns, one to each fuselage side, for a more impressive offensive "punch".
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