The Cessna Conquest I, originally known as Model 425 Corsair is a pressurized, turboprop airplane certified for eight occupants but is usually configured to seat six. A member of the Cessna Conquest series, this is an aircraft model belonging to the turbo-prop variety. Based on the Model 421 Golden Eagle, the 425 differs from its predecessor in having turboprop engines (in this case PT6As). 425 can attain speed up to 460 kilometers (true airspeed) per hour while cruising at an altitude of 9100 meters. Design work on the Corsair started in 1977. On September 12 1978 it began its first flight, and first production deliveries took place in November 1980.

The 425 is 10.9 meter long and 3.8 meter tall with an extended wing area of 20.9 square meters and wingspan of 13.5 meters. With a capacity of traveling 2480 kilometers and climbing a remarkable height of 1862 fpm, this aircraft is capable to lifting its speed up to 309 miles per hour. The aircraft houses a retractable tricycle landing gear and on takeoff has a ground roll of 1,785 ft (544 m). Cessna produced 236 425s from 1981-1986. The 425 is certified for single pilot operations like all normal category airplanes.

Four distinctive stacks are manufactured specifically for the Conquest I to guarantee that the stacks are in the aerodynamically correct position for the aircraft. The outcome of this individual positioning payed off, as the speed stacks not only look sleek but are fast. This increases its airspeeds by 5 to 10 knots. Improved boundary layer relief, means more exhaust residue is blown clear of the airframe.

The Speed Stacks will more than pay for themselves with a nearly 4 to 1 return.

From 1983 Cessna renamed the Corsair the Conquest I, while the Conquest became the Conquest II. Production of both aircrafts ceased in 1986. It is believed all the Corsairs landing gears were converted and so they all became Conquest Is, thus making the Corsair extinct in the US. The two Conquest models were as far as Cessna ever got to creating a family of turbo propeller airplanes such as the King Airs marketed by Cessna’s competitor Beechcraft.

The Cessna 425 Corsair & Conquest I is a twin-engined six- to eight-seat light turboprop corporate aircraft with retractable landing gear produced by the US-American manufacturer Cessna Aircraft Company.
Cessna Conquest I
2 Turboprop Engines
Engine Model
Pratt & Whitney Canada PT6A-112
Engine Power (each)
336 kW, 450 shp
426 km/h, 230 kts, 265 mph
Mmo (max. Mach)
Mach 0.52
Service Ceiling
10.180 m / 33.400 ft
2.919 km / 1.576 NM / 1.814 mi.
Empty Weight
2.209 kg / 4.870 lbs
max. Takeoff Weight
3.901 kg / 8.600 lbs
Wing Span
13,45 m / 44,1 ft
Wing Area
20,9 m² / 225 ft²
10,93 m / 35,9 ft
3,84 m 12,6 ft
First Flight
12. Sep. 1978
Production Status
out of production
Total Production
Developed from
Cessna 421 Golden Eagle
Data for (Version)
Cessna 425 Conquest I

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