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THE PIPER 31

( PA31-310 Navajo , PA31-350 Chieftain , PA31P-425 , PA31T Cheyenne )

Type: Six/eight seat corporate transport and commuter airliner.

Country of origin: United States of America.

Power plants:
        PA31-310 Two 230kW Lycoming TIO-540-A turbocharged and fuel injected flat sixes.
        PA31-350 Chieftain Two 260kW Lycoming TIO-540-J2BD turbocharged and fuel injected flat six-
        piston engines driving three blade constant speed propellers.

Electrical power:
                             Supply frequency is 400 hz , and voltage is 115 - 200 V each generator is                                                  rated at 70 kva and supply 24 v dc power.

Performance: Max cruising speed 231 kt , approach speed 74 kt ( cat app A).
                         Eco cruising speed 214 kt, Max cruising level FL 290 , total fuel capacity 727 kg.

Range: Max range with reserves and standard fuel 950 nm with optional fuel 1290 nm.

Weights: LIGHT ( L)

                PA31-310   Empty equipped 1843 kg, Max takeoff 2950 kg, Max landing 2950 kg.
                PA31-350   Empty equipped 1988 kg, Max takeoff 3175 kg, Max landing 3175 kg.

Dimensions:
                      Wing span: 12.40m        Length: 10.55m           Height: 3.96m            Wing area: 21.3m²
                      Outer main gear wheel span: 3.25 m                 Fuselage max diameter: 1.30 m

Aeroplane classification code number and letter: 1A

Propeller diameter: 2.03 m

landing field length at max landing weight: 1052 m

Take off field length at max take off weight: 1369 m

Service ceiling: 28300 ft

Initial rate of climb: 1120 ft/min

Wheel track: 4.19 m

History: The first flight of the PA31-350 occurred on 11 September 1972.

Capacity:       Standard seating in Navajo for seven, including one pilot and passenger, or two pilots on flight deck, with seating for five behind them. Chieftain has max seating for 10.

Production: 1827 Chieftain,   52 Mojave,    21 T-1020,       24 T-1040,      and 2 experimental PA31-353.
History:      The PA31P-350 Mojave was the last pressurised version of the PA 31 series to be built, while the PA31-350 Chieftain was a stretched Navajo, built on the smaller Navajo's success in the commuter and    charter roles, while the    T-120 and T-1040 were airliner    developments.    The stretched Navajo Chieftain first appeared in 1973, after Piper began design work in 1971. Originally dubbed the Navajo II, the Navajo Chieftain was intended to compete against the Cessna 402 and to a lesser extent the turboprop powered Beech 99. Changes over the basic Navajo were many, including a 61cm fuselage stretch, six side cabin windows, larger doors, and more powerful and counter rotating 260kW TIO-540 engines. From the 1980 model year the PA31-350 became known simply as the Chieftain, and the type remained in production until October 1984. Small numbers were also built of the airline optimised T-1020 and the Pratt & Whitney Canada PT6A powered T-1040 (PA31T3). The Mojave was a development of the PA31P, and its airframe was essentially similar to the turboprop powered PA-31T Cheyenne I's. Changes included less powerful 260kW counter rotating IO-540-V2As, a lower cabin pressure differential and longer span wings. Mojaves were built between 1983 and 1986.
    IRC: EPSBA , EPSBB , EPSBC.



Sources:

Aerodrome design manual.

Jane^’s all the world^’s aircraft 1974 - 2002.

www. airliners.net.

airport services manual part 1 (aircraft data for rescue and fire fighting personnel).

aircraft type designators ( doc 8643/25).