For work in South America it had to have STOL capability and be simple to operate and maintain.

The aircraft that was designed was designated the Evangel 4500-300 and was a twin-engined monoplane with a tailwheel configuration retractable landing gear.

The prototype first flew in June 1964 and the first production aircraft in January 1969.

[citation needed] Data from Jane's All The World's Aircraft 1971–72.

Aircraft of comparable role, configuration, and era