Schempp-Hirth Janus

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Janus
JanusC.jpg
Janus Ce
Role Two Seater-class sailplane
National origin Germany
Manufacturer Schempp-Hirth
Designer Klaus Holighaus
First flight May 1974
Number built 300

The Schempp-Hirth Janus is a high performance two-seat glider that was built by Schempp-Hirth GmbH.

Design and development[edit]

The design was by Dipl-Ing Klaus Holighaus and the prototype first flew in May 1974. The production examples incorporated several improvements in January 1975. The Janus has a glass-fibre monocoque fuselage similar to that of the Nimbus-2 but the cockpit section is lengthened to accommodate the two pilots in tandem with dual controls under a right-hand side hinged one-piece canopy. Landing gear consists of either a non-retractable main wheel (Janus A, B & C) or a retractable main wheel (later models of Janus C and all Ce's) with a drum or disc brake, and a nose-wheel. The two-piece wings have 2° forward sweep on the leading edge, and have camber-changing flaps which are operated between +12° and -7°. The Janus has upper surface airbrakes, and although uncommon the Janus C could also be fitted with a tail parachute.

Production[edit]

100 Januses were built by early 1980 plus three motorised Janus CMs. It is particularly suitable for cross-country instruction and training to fly flapped gliders.

Variants[edit]

  • Janus A
  • Janus B
  • Janus C
    • Janus Ce
    • Janus CM - motorised version with Rotax 535C engine
    • Janus CT - motorised version with Solo 2350 engine

The Janus B was produced from March 1978. It has a fixed-incidence tailplane instead of the all-moving type previously fitted. The Janus C has carbon-fibre wings of 20 m span and a carbon-fibre tailplane. The Janus Ce was certified in 1991 and incorporated modifications to the cockpit and fin.

The Janus M is a motorised version with a Rotax engine mounted on a pylon aft of the cockpit and retracting into the fuselage. The prototype first flew in 1978.

The French developed the Janus as the SCAP–Lanaverre SL-2. (SCAP is the Société de Commercialisation Aéronautique du Plessis SàRL with Lanaverre Industries) It first flew in 1977. The main differences from the Janus A are the provision for water ballast in the wings, a fixed tailplane with elevators, and a more comfortable cockpit.

Specifications (Janus C)[edit]

General characteristics

  • Crew: Two
  • Capacity: 240 kg (530 lb) water ballast
  • Length: 8.62 m (28 ft 3 in)
  • Wingspan: 20.00 m (65 ft 7 in)
  • Height: 1.50 m (4 ft 11 in)
  • Wing area: 17.3 m2 (186 ft2)
  • Empty weight: ca. 365 kg (803 lb)
  • Gross weight: 700 kg (1,540 lb)

Performance

  • Maximum speed: 250 km/h (155 mph)
  • Maximum glide ratio: 43
  • Rate of sink: 0.6 m/s (118 ft/min)

See also[edit]

Aircraft of comparable role, configuration and era
Related lists