Oberlerchner JOB 15

The Oberlerchner JOB 15 was an Austrian two-seat light aircraft produced by Josef Oberlerchner Holzindustrie, which had previously designed and built gliders.

JOB 15
A JOB 15-180/2
Role Two-seat lightplane
Manufacturer Josef Oberlerchner Holzindustrie
First flight 1960
Introduction 1962
Produced 1962-1966
Number built 24
Developed from Oberlerchner JOB 5

Design and development

Using experience as sailplane designers and builders, Josef Oberlerchner Holzindustrie determined to create a powered aircraft. The result was the JOB 5,[1] a two-seat side-by-side light aircraft of wooden construction.[2] It first flew in 1958. The company decided to build a slightly larger three-seat production version, the JOB 15. The JOB 15 was a low-winged monoplane of composite construction with fixed tailwheel undercarriage, with a wooden wing and steel-tube fuselage covered in glass-reinforced plastic and fabric. The prototype first flew in 1960 with a 135 hp (101 kW) Avco Lycoming O-290-D2B engine. Three aircraft were built before the a more powerful version, the JOB 15-150, was built with a 150 hp (112 kW) Avco Lycoming O-320-A2B engine. After 11 15-150s had been built an improved version, the JOB 15-150/2, was introduced and ten were built before production ended in the late 1960s.

Variants
JOB 5
Prototype two-seater, 95 hp Continental C90-12F engine, one built
JOB 15
Production three-seater with a 135 hp (101 kW) Avco Lycoming O-290 engine, three built.[3]
JOB 15-150
Re-engined version with a 150 hp (112 kw) Avco Lycoming O-320-A2B engine, 11 built.
JOB 15-150/2
Improved version, ten built.

Specifications (15-150)

Data from Janes's All The World's Aircraft 1969-70[4]

General characteristics

  • Crew: 1
  • Capacity: 3 passengers
  • Length: 7.68 m (25 ft 2 in)
  • Wingspan: 10.10 m (33 ft 2 in)
  • Height: 1.99 m (6 ft 6 in)
  • Wing area: 14.7 m2 (158 sq ft)
  • Aspect ratio: 6.94:1
  • Airfoil: NACA 643-418 at root, NACA 643-412 at tip
  • Empty weight: 601 kg (1,325 lb)
  • Max takeoff weight: 965 kg (2,127 lb)
  • Fuel capacity: 140 L (37 US gal; 31 imp gal)
  • Powerplant: 1 × Avco Lycoming O-320-A2B four-cylinder air-cooled horizontally-opposed engine, 110 kW (150 hp)

Performance

  • Maximum speed: 235 km/h (146 mph, 127 kn)
  • Cruise speed: 195 km/h (121 mph, 105 kn) (economical cruise)
  • Stall speed: 70 km/h (43 mph, 38 kn) (flaps down)
  • Never exceed speed: 285 km/h (177 mph, 154 kn)
  • Range: 1,000 km (620 mi, 540 nmi) with max payload (65% power)
  • Service ceiling: 4,500 m (14,800 ft)
  • Rate of climb: 4.40 m/s (866 ft/min)
  • Takeoff run to 15 m (50 ft): 306 m (1,000 ft)
  • Landing run from 15 m (50 ft): 338 m (1,109 ft)

References
  1. The prototype JOB 5 was a side-by-side two-seater powered by Continental C90-12F (95 hp). It was built in 1957 and flew for over 100 hrs during 1958-9. These development flights led the company to incorporate the changes which led to the JOB 15.
  2. Walford 1960, p.151.
  3. Taylor 1969, p. 7.
  4. Taylor 1969, pp. 7–8.
  • The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
  • Mondey, David (1981). Encyclopedia of The World's Commercial and Private Aircraft. New York: Crescent Books.
  • Taylor, John W. R., ed. (1969). Jane's All The World's Aircraft 1969-70. London: Jane's Yearbooks. ISBN 0-354-00051-9.
  • Walford, Edith (18 January 1960). "JOB 5 Sport Plane Enters Final Testing". Aviation Week & Space Technology. Vol. 72 no. 3. pp. 131, 135, 137, 139.

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