It was developed in November 1974, with the first aircraft delivered in September 1977. It is a pressurized, 8–9 passenger turbine development of the Cessna 404 Titan. The original design from 1972 for this aircraft was known as the Model 435 and was to be powered by Continental GTSIO-520X engines with three bladed propellers. By 1975 the designed evolved into the turboprop powered Model 441. It was certified by the FAA on August 19, 1977. Cessna renamed the model 441 the Conquest II in 1983. 1984 models starting with constructor number 195 used lighter weight four-bladed McCauley propellers. A 441 with Pratt & Whitney Canada PT6A-112 turboprops was flown in 1986 but did not enter production. A smaller aircraft was marketed as the Cessna 425 Conquest I, itself a turbine development of the Cessna 421. In Summer 2007, Cessna limited the Conquest II to 22,500 hours of air time for US for air carriers, an advise only for private operators.[4] Cessna built 362 units from 1977 through 1986. It cruises at 316 kn (585 km/h) TAS while burning 480 lb (220 kg) of fuel per hour at FL290, while maximum range is 2,000 nmi (3,700 km) at 260 kn (480 km/h) TAS and 310 lb (140 kg)/h at FL350. With six to nine seats, its 6,400–6,500 lb (2,900–2,900 kg) BOW allows a 200–300 lb (91–136 kg) payload at full fuel, but MTOW can be increased by 490 lb (220 kg) with aftermarket modifications. Most have been upgraded from twin Garrett TPE331-8s engines to -10s for better climb performance, a ceiling raised to FL350 from FL330, and TBO raised from 3,000 to 5,000h for $225,000 per engine. Converting from the standard three blade propellers to smaller diameter Hartzell four blade propellers results in a climb rate improved by 200 fpm (1.01 m/s) and a 5 kn (9.3 km/h) increase in cruise speed as well as reducing cabin noise and improving ground clearance. The aircraft has a retractable tricycle landing gear and has a ground roll of 1,785 ft (544 m) on takeoff. The high aspect ratio wings use bonded construction techniques. The ICAO designator for the Cessna Conquest as used in flight plans is C441.
