History Cessna announced the stretched version of the Citation I in September 1976. The cabin was lengthened by a little over 3 feet and the center aisle was dropped 4.8 inches. This increased cabin volume by 58 cubic feet. Thrust from each powerful Pratt & Whitney JT15D4 engines was increased from 2,200 to 2,500 pounds. The normal cruise speed increased by 22 knots. The Citation II first flew on January 31, 1977. Summary NAME: Citation S/II MANUFACTURER: Cessna Type: Jets RANGE: 1430 nm SPEED: 386 kts PASSENGERS: 7 people ACQUISITION COST: $752,555 ENGINES: Pratt & Whitney Canada JT15D-4B 2 AVIONICS: WINGSPAN: 52.2 ft IFR CERTIFIED: Yes