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Rockwell 685

Type of aircraft From Wikipedia, the free encyclopedia

Rockwell 685
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The Rockwell Commander 685 or Aero Commander 685[1] is a light-twin piston-engined aircraft with a pressurized cabin originally built by the Aero Commander company, a division of Rockwell International from 1965.

Quick facts Aero Commander 685 /, Role ...

The predecessor model was the Aero Commander 690 and the next generation are Aero Commander JetProp series. The Aero Commander 685 had the ICAO aircraft code AC6L[2] The introduction was in 1971 and the retired in 1976; in this time are built 66 aircraft.[citation needed]

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Design and development

The Commander 685 was a piston-engined variant of the turboprop-powered Rockwell Commander 690, with two wing-mounted 435 hp Continental GTSIO-520K piston engines in tractor configuration with three-bladed Hartzell feathering propellers. It is a high-wing cantilever monoplane with an enclosed nine-seat cabin and a retractable nose-wheel landing gear. The Model 685 was type certified by the Federal Aviation Administration on 17 September 1971.

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Specifications

Data from Jane's All the Worlds Aircraft 1976–77[3]

General characteristics

  • Crew: 1–2
  • Capacity: 7–8 passengers
  • Length: 42 ft 11+34 in (13.10 m)
  • Wingspan: 46 ft 6.6 in (14.19 m)
  • Height: 14 ft 11+12 in (4.56 m)
  • Wing area: 266 sq ft (24.7 m2)
  • Empty weight: 6,021 lb (2,731 kg)
  • Max takeoff weight: 9,000 lb (4,082 kg)
  • Fuel capacity: 256 US gal (213 imp gal; 970 L) standard, 322 US gal (268 imp gal; 1,220 L) with auxiliary tanks
  • Powerplant: 2 × Continental GTSIO-520-F air-cooled flat-six, 435 hp (324 kW) each
  • Propellers: 3-bladed Hartzell, 7 ft 4 in (2.24 m) diameter

Performance

  • Maximum speed: 279 mph (449 km/h, 242 kn) at 20,000 ft (6,100 m) (TAS)
  • Cruise speed: 255 mph (411 km/h, 222 kn) at 24,000 ft (7,300 m), (max cruise) (TAS)
  • Stall speed: 86 mph (139 km/h, 75 kn) (wheels and flaps down), (CAS)
  • Range: 1,920 mi (3,090 km, 1,670 nmi) (econ cruise at 20,000 ft (6,100 m), no reserves)
  • Service ceiling: 27,500 ft (8,400 m)
  • Rate of climb: 1,490 ft/min (7.6 m/s)
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References

Further reading

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