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PA-31 Navajo
Piper PA-31 Navajo
Role Piston
Manufacturer Piper Aircraft
First flight 30 September 1964[1]
Primary user Corporate
Number built 2044

The Piper PA-31 Navajo is a family of cabin-class, twin-engine aircraft designed and built by Piper Aircraft for the general aviation market, using Lycoming engines. It was also licence-built by Embraer as the EMB 820.[2]

In the mid-1960s company founder William T. Piper started development of the PA-31. Targeted at small-scale cargo and feeder liner operations and the corporate market, the aircraft was a success. It continues to prove a popular choice, but due to greatly decreased demand across the general aviation sector in the 1980s, production of the PA-31 ceased.

Contents

Variants

Piper PA-31 Navajo
1980 Navajo Chieftain
1982 Piper PA-31 Navajo Chieftain

The PA-31 series was produced in the following versions.

PA-31 Inca
Original designation of the Piper PA-31 Navajo.
PA-31 Navajo
Twin-engined corporate, commuter transport aircraft, with accommodation for a crew of two and six to eight passengers, powered by two 300-hp (224-kW) Lycoming IO-540-K piston eninges. Initial production version.
PA-31 Pressurized Navajo
Pressurized version of the PA-31 Navajo, powered by two 425-hp (317-kW) Lyconming TIGO-541-E1A piston engines.
PA-31T Turbo Navajo
Turbocharged version of the PA-31 Navajo, powered by two 310-hp (231-kW) Lycoming TIO-540-A turbochanged engines.
PA-31-310 Navajo
Sometimes referred to as a "straight Navajo". Also called the "Mini - Liner"
PA-31-325 Navajo
Referred to as the "CR" or Counter Rotating.
PA-31-325 Turbo Navajo C/R
Turbocharged version of the PA-31-325, powered by two 325-hp (242-kW) turbocharged piston engines, fitted with counter-rotating propellers.
PA-31-350 Navajo Chieftain
(Originally called the "Navajo II") featured a stretched cabin and more powerful engines. Powered by two 350-hp (261-kW) (Lycoming TIO-540-J2BD) turbocharged piston engines. The fuselage was lengthened by 2ft 0in (0.61m).
PA-31-350
Alternative designation of the Piper T-1020.
T-1020
The T-1020 (PA-31-350) was a Chieftain modified to be marketed to the commuter airline market.
PA-31P-425 Pressurized Navajo
(Commonly referred to as "P-Navajo") was equipped with a pressurized cabin and Lycoming TIGO-541-E1A engines.[3]
Piper Mojave
The Piper Mojave was an upgraded, re-engineered version of the PA-31P.
PA-31T Cheyenne
Pressurized, turboprop version.
PA-31T-3
Alternative designation of the Piper T-1040.
T-1040
The Piper T-1040 (PA-31T-3) was an airline version of the PA-31T Cheyenne.
T-1050
Projected version with fuselage lengthened by 11ft 6in (3.51m).

Operators

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Military operators

 Finland
 Honduras
 Iceland

Accidents

Specifications (PA-31-310 Navajo)

Data from Jane's All The World's Aircraft 1976-77 [4]

General characteristics

  • Crew: 1 or 2
  • Capacity: 5 to 7 passengers
  • Length: 32 ft 7½ in (9.94 m)
  • Wingspan: 40 ft 8 in (12.40 m)
  • Height: 13 ft 0 in (3.96 m)
  • Wing area: 229 sq. ft (21.3 m²)
  • Empty weight: 3,930 lb (1,782 kg)
  • Max takeoff weight: 6,500 lb (2,948 kg)
  • Powerplant:Lycoming TIO-540-A air-cooled six-cylinder horizontally-opposed piston engine, 310 hp (231 kW) each
  • Propellers: Three blade, metal, fully feathering, Hartzell Propeller propeller

Performance

Specifications (PA-31-350 Chieftain)

Data from Jane's All The World's Aircraft 1976-77 [5]

General characteristics

  • Crew: 1 or 2
  • Capacity: 8 passengers
  • Length: 34 ft 7½ in (10.55 m)
  • Wingspan: 40 ft 8 in (12.40 m)
  • Height: 13 ft 0 in (3.96 m)
  • Wing area: 229 ft² (21.3 m²)
  • Empty weight: 4,114 lb (1,866 kg)
  • Max takeoff weight: 7,000 lb (3,175 kg)
  • Powerplant:Lycoming TIO-540-J2BD air-cooled six-cylinder horizontally-opposed piston engine, 350 hp (261 kW) each
  • Propellers: Three blade, metal, fully feathering, Hartzell propeller

Performance

See also

Related development

Comparable aircraft

References

  1. ^ Taylor 1976, p.354.
  2. ^ Bonelli, Regis and Armando Castelar Pinheiro. "New Export Activities in Brazil: Comparitive Advantage, Policy or Self-Discovery", Research Network Working Paper #R-551, Inter-American Development Bank, July 2008.
  3. ^ "The Piper PA-31 Navajo/Pressurized Navajo". airliners.net. 2009. http://ww.airliners.net/aircraft-data/stats.main?id=311. Retrieved 2009-01-13. 
  4. ^ Taylor 1976, p.355.
  5. ^ Taylor 1976, p.357.

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