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Curtiss Twin JN (JN-5, Model 1B)
Role Experimental biplane observation aircraft
Manufacturer Curtiss
Introduction 1916
Primary user United States Army Air Service
Number built 8

The Curtiss Twin JN (retrospectively called Model 1B, also known as JN-5) was an American experimental biplane observation aircraft built by Curtiss for the United States Army Air Service.

Based on the successful JN-4, the Twin JN used the same wing structure with an extended span, by enlarging the center section. Control was achieved with the tail of a Curtiss R-4. For power, it employed a pair of 90 hp (67 kW) Curtiss OXX-2s, between the wings.

One aircraft was evaluated by the United States Navy as a twin-float seaplane.


United States


Data from Curtiss Aircraft 1907–1947[1]

General characteristics

  • Crew: 2
  • Length: 29 ft 0 in (8.83 m)
  • Wingspan: 52 ft 9⅜ in (16.08 m)
  • Height: 10 ft 8⅜ in (3.26 m)
  • Wing area: 450.3 ft2 (41.83 m2)
  • Empty weight: 2,030 lb (921 kg)
  • Gross weight: 3,110 lb (1,411 kg)
  • Powerplant: 2 × Curtiss OXX-2 water-cooled V-8 water-cooled aircraft piston engine, 90 hp (67 kW) each each


  • Maximum speed: 80 mph (129 km/h)
  • Service ceiling: 11,000 ft (3,350 m)

See also


  1. Bowers 1979, p. 166.
  • Bowers, Peter M. Curtiss Aircraft 1907–1947. London:Putnam, 1979. ISBN 0-370-10029-8.
  • Donald, David, ed. Encyclopedia of World Aircraft. Etobicoke, ON: Prospero Books, 1997.
  • John Andrade, U.S.Military Aircraft Designations and Serials since 1909, Midland Counties Publications, 1979, ISBN 0-904597-22-9

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