Piper PA-31 Navajo

$314,000 (in 1984) civil utility aircraft

Overview

Piper United States ICAO: PA31 1967–1984 Active $314,000 (1984)

The Piper PA-31 Navajo was designed and produced by Piper Aircraft as a series of cabin-class twin-engined aircraft intended for the general aviation market. The aircraft was usually powered by Lycoming engines and was also license-built in some countries in Latin America. The Navajo was introduced on March 30, 1967, and was produced from 1967 to 1984 with a total number of 3,942 aircraft built.

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Specifications

Units
Engine
2 × Lycoming TIO-540-A
Engine type
Piston
Power
2 × 310 hp · 231 kW
Avionics
Garmin GNS 530W, Garmin 696 with XM weather, S-tek 55X autopilot w/GPSS
Wing tips
No winglets
Seats
7
Crew
—
Cabin width
4 ft 2 in  ·  1.27 m
Cabin height
4 ft 3 in  ·  1.30 m
Cabin length
10 ft 9 in  ·  3.27 m
Exterior length
32 ft 6 in  ·  9.90 m
Tail height
13 ft 0 in  ·  3.96 m
Fuselage diameter
4 ft 5 in  ·  1.35 m
Wing span
40 ft 8 in  ·  12.40 m
Baggage volume
60 ft³  ·  1.7 m³
Gross weight
—
Empty weight
—
Max takeoff weight
6,500 lb  ·  2,950 kg
Max landing weight
6,500 lb  ·  2,950 kg
Max payload
2,450 lb  ·  1,100 kg
Fuel capacity
190 gal · 700 L · 500 kg (AvGas)
Max cruise speed
227 kt  ·  261 mph  ·  420 km/h
Maximum speed
—
Cruise speed
—
Approach speed
63 kt  ·  72 mph  ·  117 km/h
Range
1,012 nm  ·  1,160 mi  ·  1,870 km
Fuel burn
—
Ceiling
26,300 ft  ·  8,000 m
Rate of climb
1,440 ft/min  ·  7 m/s
Takeoff distance
1,310 ft  ·  400 m
Landing distance
1,890 ft  ·  580 m
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‘N86CM’ Piper PA-31-310 LAM Air

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Operational Context

The Piper PA-31 Navajo was built upon the request of William T. Piper in 1962 to build a six to eight-seat corporate and commuter aircraft powered by two Lycoming engines. The development was given the project name Inca. During late 1964, the aircraft designated as PA-31 was officially introduced after its maiden flight on September 30, 1964. The Pa-31 Navajo was produced from 1967 to 1984 with a total number of 3,942 aircraft built.

The Piper Pa-31 Navajo can accommodate one or two crew and five to seven passengers on board. It has an external length of 9.94 meters, an external height of 2.3 meters, and a fuselage diameter of 1.35 meters. The low-wing monoplane has a wingspan of 12.4 meters and a wing area of 21.3 square meters. It has a conventional tail with a height of 3.96 meters and a wheelbase of 3 meters. The cabin height is 1.3 meters, the cabin width is 1.27 meters and the cabin length is 3.27 meters.

The civil utility aircraft is powered by two Lycoming TIO-540-A engines. It is a turbocharged, fuel-injected, air-cooled, horizontally-opposed piston engine that produces a maximum takeoff thrust of 310 horsepower each and drives three0bladed Hartzell metal, fully feathering propellers of 2.03 in diameter. The PA-31 Navajo has an empty weight of 1,783 kg, a maximum payload of 1,100 kg, and a maximum takeoff weight of 2,948 kg. The total fuel tank capacity is 190 US gal and the useable fuel is 187 US gal.

The Piper PA-31 Navajo has a maximum speed of 227 knots at 15,000 feet. It has a cruise speed of 207 knots at 20,000 feet, a stall speed of 63 knots with flaps down, and a never exceed speed of 236 knots. The travel range is 1,012 nautical miles at 20,000 feet. The aircraft can fly up to 26,000 feet and can climb at a rate of 1,445 feet per minute.