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

The Curtiss Twin JN (retrospectively called the Model 1B and also known as the JN-5) was an experimental aircraft built by the Curtiss Aeroplane and Motor Company for the United States Army Air Service. It was a biplane, designed for observation missions.

Based on the successful Curtiss JN-4, the Twin JN used the same wing structure, but the wingspan was extended by enlarging the center section. Lateral control was achieved with the tail of a Curtiss R-4. The Twin JN was powered by a pair of 90 hp (67 kW) Curtiss OXX-2 engines located between the wings.

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

 United States

• United States Army Air Service
• United States Navy

Data from Curtiss Aircraft 1907–1947^[1]

General characteristics

• Crew: two
• Length: 29 ft 0 in (8.83 m)
• Wingspan: 52 ft 9.38 in (16.08 m)
• Height: 10 ft 8.38 in (3.26 m)
• Wing area: 450.3 sq ft (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

Performance

• Maximum speed: 80 mph (129 km/h, 70 kn)
• Service ceiling: 11,000 ft (3,350 m)

Related lists

• List of military aircraft of the United States
• List of aircraft of the Royal Flying Corps

• 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