I considered Cessna 414 and 421 models along with the short body Navajos and Chieftains. Fuel: $38,502 (I typically cruise @ 2250 RPM, slightly ROP, running 11 gph indicated per side, actual total measured fuel including taxi and climb normalizes around 28 gph +/- 0.5 gph depending on the length of trip and altitude. The short Navajo without nacelle lockers really benefits from the engine power increase and the Q-tip propellers yield a substantial 6 dbA interior noise reduction. There was an optional fuel system available, which boosted range to a … Looking for some general data on a typical mid-life Piper Navajo Chieftain (the stretched, piston 'ho). Changing from 30" to 26" gives a speed difference of about 15kts TAS. Horsepower: 310.00 - Navajo's usually have 10-15 L more usable fuel and burn 10 L/hr less then Chieftains. Maintained by one of the leading Chieftain dealers in the country. A standard-fuel P-Navajo has an endurance in the three-hour range with IFR reserves. Big engines also mean short range. Targeted at small-scale cargo and feeder liner operations and the corporate market, the aircraft was a success. The PA-31-325 Navajo seats up to 7 passengers plus 1 pilot. Combine this with the fuel burn (mid-20s per engine) and you have a high hourly operating cost. The Piper PA-31 Navajo is a family of cabin-class, twin-engined aircraft designed and built by Piper Aircraft for the general aviation market, most using Lycoming engines. Piper Navajo, Chieftain, & Seneca Nacelle Tanks. - Unless you are always flying long sectors make sure the PA31 has the undercarriage mod "Red Legs" otherwise you will be landing weight limited. While pressurization would be nice, I ultimately decided on the Navajo Chieftain because of my familiarity with Lycoming engines and the extra 24 inches in fuselage length that the Chieftain offered as compared to the PA-31-310 and PA-31-325 model Navajos. Can somebody remind me please if the maximum is 7 or 9 passenger seats in a Navajo (assuming single pilot operations and with one pax in the copilot seat)? Running at 26", you can expect a burn of 26gph or 2.6lb/min. But at 26, most engines will lean down to 13gph. Griggs Aircraft is the holder of the STCs for the Piper PA-31, 31-325, 31-350 (Navajo & Navajo Chieftain) and PA-200T & PA-220T (Seneca) Auxiliary Nacelle Fuel Tanks, previously produced by Nayak Aviation. 1976 Piper Navajo Chieftain. 1978 PIPER PA-31-325 Navajo - Specifications, Performance, Operating cost, Valuation, Brokers - planephd.com Toggle navigation PIPER NAVAJO PA-31-310 Turbo Navajo Performance & Operating Costs Search for PIPER NAVAJO PA-31-310 Turbo Navajo B;C(prior 80 less fuel) 's currently for sale. At 30", a realistic fuel burn at that lean setting is 18gph. So comparing the fuel burn, running 2 engines at 30" will burn 36gph, or 3.6lb/min (36*6/60). - Navajo at MTOW performs better then a Chieftain at MTOW. Piper PA-31 Navajo Chieftain Thoughts turn to home and with Tim's guidance I set up a constant descent with the power at 25in and 2,350rpm, letting the speed build up to 200kt as we start back to Blackbushe and eventually return to circuit height. Horsepower: 310 Gross Weight: 6500 lbs Top Speed: 226 kts Empty Weight: 3842 lbs Cruise Speed: 215 kts Fuel Capacity: 150 gal Stall Speed (dirty): 62 kts Range: 840 nm Takeoff: Landing: Ground Roll: 890 ft Ground Roll 1115 ft: Over 50 ft obstacle: 1760 ft Over 50 ft obstacle: 1690 ft Rate Of Climb: 1395 fpm Rate of Climb (One Engine): 245 fpm Ceiling: 26300 ft Ceiling (One Engine): 15800 ft It was also license-built in a number of Latin American countries. First hour fuel burn is 50 gallons with 40 to 42 GPH in cruise at 65 percent which on a standard day at 10,000 feet yields about 200 knots TAS with a takeoff weight of 6000 pounds.