Auster Avis

The Auster Avis was a four-seat light aircraft developed from the Auster Autocrat. It featured a redesigned fuselage incorporating four doors and a circular cross-section towards the tail, new undercarriage, and new wing flaps. It was planned in two versions, the Mk 1 for civil use, and the Mk 2 for military and air ambulance duties. However, only two prototypes were built, and Auster abandoned the project in favour of the Auster J-5 Autocar.

Avis
Role Utility aircraft
Manufacturer Auster
First flight late 1947
Number built 2
Developed from Auster Autocrat

Specifications (Avis)

Data from Jane's all the World's Aircraft 1949-50,[1] The Incomplete Guide to Airfoil Usage[2]

General characteristics

  • Crew: 1
  • Capacity: 3 pax
  • Length: 23 ft 7 in (7.18 m)
  • Wingspan: 36 ft 4 in (11.07 m)
  • Height: 6 ft 5.5 in (1.969 m) tail down, propeller horizontal
  • Wing area: 185 sq ft (17.2 m2)
  • Aspect ratio: 6.982
  • Airfoil: NACA 23012
  • Empty weight: 1,480 lb (671 kg)
  • Gross weight: 2,550 lb (1,157 kg)
  • Fuel capacity: Fuel:34 imp gal (41 US gal; 150 l) in two wing root fuel tanks; Oil:3 imp gal (3.6 US gal; 14 l) aft of engine.
  • Powerplant: 1 × de Havilland Gipsy Major 10 4-cylinder inverted air-cooled in-line piston engine, 145 hp (108 kW) maximum at 2,550rpm; 108 hp (81 kW) continuous at 2,300 rpm
  • Propellers: 2-bladed Weybridge wooden fixed pitch propeller

Performance

  • Maximum speed: 115 mph (185 km/h, 100 kn) fully loaded
  • Cruise speed: 100 mph (160 km/h, 87 kn) fully loaded
  • Stall speed: 40 mph (64 km/h, 35 kn) fully loaded, flaps down
  • Range: 500 mi (800 km, 430 nmi) fully loaded in still-air
  • Service ceiling: 12,000 ft (3,700 m) fully loaded
  • Rate of climb: 510 ft/min (2.6 m/s) fully loaded
  • Wing loading: 13.8 lb/sq ft (67 kg/m2) fully loaded
  • Fuel consumption mpg: 13 1⁄3 mpg‑imp (4.7 km/L)
  • Fuel consumption: 0.525 lb/mi (0.148 kg/km)
  • Power/mass: 17.5 lb/hp (10.6 kg/kW) fully loaded at 2,300 rpm; 14.9333 lb/hp (9.0836 kg/kW) at 2,200 rpm
  • Take-off run: 185 yd (169 m) in 5 mph (4.3 kn; 8.0 km/h) wind
  • Landing run: 130 yd (120 m) in 5 mph (4.3 kn; 8.0 km/h) wind

References
  1. Bridgman, Leonard, ed. (1949). Jane's all the World's Aircraft 1949-50. London: Sampson Low, Marston & Co. pp. 20c–21c.
  2. Selig, M. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 22 November 2018.

Further reading
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 84.
  • World Aircraft Information Files. London: Bright Star Publishing. pp. File 889 Sheet 85.
  • Simpson, R. W. (1995). Airlife's General Aviation. Shrewsbury: Airlife Publishing. p. 42.


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