The Convair 640 was an American twin-engined medium-range airliner first flown in 1965. The Convair 640 was a turboprop conversion of the Convair-Liner 340 and was powered by two Rolls-Royce Datrt Rda.10 Mk 542-4 turboprops providing a top speed of 482 kmh and a range of 4835 km. Caribair CV-640 update for FSX