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Aviation History
1972
1972 - 1926.PDF
FLIGHT International, 27 July 1972 NORTH AMERICAN ROCKWELL AERO COMMANDER 685 131 Span: 46ft 6-64 in, 14 2m Length: 42ft 6-64in, 130m Height: 14ft 11 -35in, 4-56m All-up weight: 9,050lb, 4,100kg Basic weight: 6,0211b, 2,730kg Powerplants: Continental GTSIO-520s of 435 h.p. Propellers: Hartzell I dia) Fuel capacity: Bin, 2-235m Standard; 256 US gal, 214 Imp gal, 970lit. With auxiliary; 322 US gal, 268 Imp gal, 1,220lit Speeds: 75% power; 255.m.p.h., 222kt, 410km/hr at 2,400ft. Stall (clean); 93 m.p.h., 81 kt, 150km/hr Runway: Take-off to 50ft; 2,711ft, 830m. Landing from 50ft; 2,312ft, 708m Range: 75% power standard fuel (45min reserve); 1,100 n.m., 1,274 st miles, 2,050km. Max fuel (45min reserve); 1,500 n.m., 1,731 st miles, 2,790km Latest of a long line of Aero Commanders, the 685 is basically the Turbo-Commander 690 re-engined with twin Continental turbo-charged GTSIO-520F piston engines, and is therefore the first Continental-powered Commander for about ten years. The "F" series engine is the most powerful variant of the GTSIO-520 and results from the development of a larger turbo-charger, intercooler and a new two-stage PIPER NAVAJO B fuel pump. The fuselage is pressurised to a differential of 4-21b/sq ft and maintains sea-level cabin conditions up to an altitude of 9,000ft. The first five production aircraft were delivered during June, the factory price being $229,400 with basic equipment. Maker: North American Rockwell, Bethany, Oklahoma. W/ii mmmmtmm^fa 45inX31in» Span: 40ft 7in, 12-4m Length : 32ft 7in, 9-9m Height: 13ft Oin, 4m All-up weight: 6,500lb, 2,954kg Basic weight: 3,849lb, 1,742kg Powerplants: Avco Lycoming TIO-540AS of 310 h.p. Propellers: Hartzell Fuel capacity: Standard; 150 US gal, 125 Imp gal, 568lit. Max option; 192 US gal, 160 Imp gal, 727lit Speeds: Cruise; 223 m.p.h., 194kt, 359km/hr at 12,000ft. Stall; 73 m.p.h., 63kt, 117km/hr Runway: Take-off to 50ft; 2,190ft, 668 m Range: 75% power at 12,000ft; 1,036 n.m., 1,190 st miles, 1,920km to dry tanks Production of the Navajo was accelerating at Lock Haven when the factory was brought to a halt by Hurricane Agnes in June; 63 aircraft had been delivered during the first half of 1972. The Navajo was an immediate success among local- service operators and the refinements introduced on the Model B have added to its utility: Piper is to introduce a stretched-fuselage version in the autumn which will be specifically for the commuter market. A pressurised version is offered for business aviation and a PT6-powered deriva tive has been certificated. The Navajo B, equipped to air line requirements, is listed at $180,000. Maker: Piper Aircraft Corporation, sylvania 17745. Lock Haven, Venn-
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