The AISA I-18 was a Spanish three-seater cabin monoplane of the 1950's. The AISA I-18 was a high-wing cantilever monoplane of metal construction powered by a ENMA Tigre G-IV-B four-cylinder in-line inverted air-cooled engine providing a top speed of 225 kmh and a range of 750 km. Research I-18
 
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