The Piper PA-31 Navajo is a family of twin-engined utility aircraft designed and built by Piper Aircraft for small cargo and feeder airlines, and as a corporate aircraft. Production ran from 1967 to 1984.
In September 1972, Piper unveiled the PA-31-350 Navajo Chieftain, a Navajo B stretched by 2 ft (61 cm) for up to ten seats, with more powerful engines and counter-rotating propellers to prevent critical engine handling problems. The Chieftain was powered by Lycoming TIO-540 variants, with an opposite-rotation LTIO-540 on the right-hand wing, and MTOW was increased to 7,000 lb (3,175 kg). Deliveries started in 1973.
Max Seats: 8
Max takeoff weight: 6,500 lb / 2,948 kg
Range at MTOW: 1165 mi / 1,875 km / 1012 nmi
Cruising speed: 238 mph / 383 km/h / 207 kn
Wingspan: 40 ft 8 in / 12.40 m
Length: 32 ft 7 in / 9.94 m
Height: 13 ft 00 in / 3.96 m
Engine: 1 × Lycoming TIO-540