|Role||Light twin aircraft|
|Developed from||Cessna 310|
Design and development
The 340 was conceived as a cabin-class development of the successful Cessna 310.
The 340 is a six-seat aircraft, with four passenger seats, an aisle and an airstair door. The tail and landing gear were based on the Cessna 310's units, while its wings were from the Cessna 414. The 340's primary selling feature was its spacious, pressurized cabin, the first in a light twin.
The early models have two turbocharged Continental TSIO-520-K engines with 285 hp (214 kW) each. Starting in 1976, the engines were upgraded to the more powerful Continental TSIO-520-NB engines of 310 hp (233 kW). This variant is known as the 340A and it also features smaller 75.5-inch (1,920 mm) diameter propellers to reduce noise and meet ICAO Annex 16 noise requirements.
The Cessna 335 was marketed as a low-priced, non-pressurized, version powered by 300 hp (225 kW) Continental TSIO-520-EB engines. The prototype 335 made its maiden flight on December 5, 1978, with the first production aircraft flying in 1979. It was not a market success, with only 64 built by the time production ended in 1980. The 340 was more successful and remained in production until 1984 with 1287 built.
- Pressurized six-seat twin powered by two Continental TSIO-520-K engines of 285 hp (214 kW) each. Certified 15 October 1971. 350 built.
- Pressurized six-seat twin powered by two Continental TSIO-520-NB engines of 310hp (233 kW) each. Certified 19 November 1975 948 built.
- Unpressurized six-seat twin powered by Continental TSIO-520-EB engines of 300hp (225 kW) each. Certified 2 October 1979 65 built.
- Riley Jet Prop 340
- Conversion of Cessna 340 aircraft by fitting two Lycoming LTP101 turboprop engines.
- Riley Rocket 340
- Conversion of Cessna 340 aircraft by fitting two 340 hp (254 kW) Lycoming TIO-540-R engines. Also designated R340L.
- Riley Super 340
- Conversion of 1972–1975 Cessna 340 aircraft by fitting two 310hp Continental TSIO-520-J/-N engines. Also known as R340 Super.
Data from Plane & Pilot, Airliners.net, The Incomplete Guide to Airfoil Usage
- Crew: one pilot
- Capacity: five passengers
- Length: 34 ft 4 in (10.46 m)
- Wingspan: 38 ft 1 in (11.61 m)
- Height: 12 ft 7 in (3.84 m)
- Wing area: 184 sq ft (17.1 m2)
- Airfoil: NACA 23018 (root) NACA 23015 (tip)
- Empty weight: 3,921 lb (1,779 kg)
- Max takeoff weight: 5,990 lb (2,717 kg)
- Powerplant: 2 × Continental TSIO-520-NB air-cooled flat-six engines, 310 hp (230 kW) each
- Maximum speed: 244 kn (281 mph, 452 km/h)
- Stall speed: 82 kn (94 mph, 152 km/h)
- Range: 1,406 nmi (1,618 mi, 2,604 km)
- Service ceiling: 29,800 ft (9,100 m)
- Rate of climb: 1,650 ft/min (8.4 m/s)
Aircraft of comparable role, configuration and era
- Aviation Consumer's Used Aircraft Guide
- Plane and Pilot: 1978 Aircraft Directory, page 92. Werner & Werner Corp, Santa Monica CA, 1977. ISBN 0-918312-00-0
- Montgomery, MR & Gerald Foster: A Field Guide to Airplanes, Second Edition, page 106. Houghton Mifflin Company, 1992. ISBN 0-395-62888-1
- Demand Media, Inc (2008). "The Cessna 340 & 335". Retrieved 2008-08-09.
- Federal Aviation Administration (August 1994). "TYPE CERTIFICATE DATA SHEET NO. 3A25". Retrieved 2008-08-10.
- Taylor 1980, pp. 318–319.
- Simpson 1991, p.108
- Simpson 1991, p. 107
- Taylor 1982, p. 454.
- Taylor 1988, pp. 461–462.
- R.W.Simpson, Airlife's General Aviation, Airlife Publishing, England, 1991, ISBN 978-1-85310-194-6
- Taylor, John W. R. Jane's All The World's Aircraft 1980–81. London: Jane's Publishing Company, 1980. ISBN 0-7106-0705-9.
- Taylor, John W. R. Jane's All The World's Aircraft 1982–83. London: Jane's Yearbooks, 1982. ISBN 0-7106-0748-2.
- Taylor, John W. R. Jane's All The World's Aircraft 1988–89. Coulsdon, UK: Jane's Defence Data, 1988. ISBN 0-7106-0867-5.