|"NC-1" after completion, in three-engine configuration, 3 October 1918.|
|National origin||United States|
|Manufacturer||Curtiss Aeroplane and Motor Company|
|First flight||4 October 1918|
|Primary user||United States Navy|
The Curtiss NC (Navy Curtiss, nicknamed "Nancy boat" or "Nancy") was a flying boat built by Curtiss Aeroplane and Motor Company and used by the United States Navy from 1918 through the early 1920s. Ten of these aircraft were built, the most famous of which is the NC-4, the first airplane to make a transatlantic flight. The NC-4 is preserved in the National Museum of Naval Aviation, at NAS Pensacola, Florida.
Manufacture of the "NC"s began in 1918 during World War I. The U.S. Navy wished for an aircraft capable of long ocean flights, both for Anti-submarine warfare patrol, and if possible with capability to fly across the Atlantic Ocean under their own power to avoid having to be shipped through ocean waters menaced by German submarines. This was a very ambitious undertaking, given the state of aviation at the time. The Navy and Curtiss came up with one of the largest biplane designs yet produced, equipped with sleeping quarters and a wireless transmitter/receiver. It was originally powered by three V12 Liberty engines, of 400 hp (298 kW) each; during the testing phase Marc Mitscher recommended the addition of a fourth engine to help create enough power to lift the boats out of the water. The fourth engine was added to the midline in a pusher configuration. The maximum speed was 90 mph (144 km/h) and the estimated maximum range was 1,500 mi (2,400 km). Called NC boats, with the "N" for Navy and "C" for the builder Curtis, they were nicknamed "Nancys".
Operational history 
On 4 October 1918, the first of these aircraft, the NC-1, made its first test flight with the early three-engine configuration. On 25 November, it flew again, with a world record 51 people on board. [N 1] Armistice Day, signaling the end of the war in Europe, came before testing of the first NC and construction of the other three of the Navy's initial order had been completed.
The NC-2 suffered damage during the testing phase and was cannibalized for spare parts.
The other three NCs, NC-1, NC-3, and NC-4, set out on what was intended as the first demonstration of transatlantic flight, via Newfoundland and the Azores, on 8 May 1919. As junior officer, Mitscher, who had been slotted to one of the commands, lost his command when NC-2 had to be broken up for parts. He went on the flight as one of the pilots of the NC-1. The group met heavy fog off the Azores, making flight in the early instrumented aircraft extremely dangerous. Without a visible horizon it was extremely difficult to keep the aircraft in level flight. NC-1 tried different altitudes and soldiered on for several hours before eventually putting down just short of the Azores and was damaged beyond repair in the rough seas.
Only the NC-4 made it through. The crew of NC-1 was rescued at sea. Attempts to tow the aircraft to the Azores failed. NC-3 was forced to land some 205 mi (330 km) distance from the Azores, but the crew, led by Commander John Henry Towers, managed to sail her to Ponta Delgada unaided.
The Navy had two more sets of NCs constructed, numbered NC-5 through NC-8, and NC-9 and NC-10, through 1921.
Specifications (NC-4) 
Data from Holmes 2005, p 63.
- Crew: six
- Length: 68 ft 3 in (20.8 m)
- Wingspan: 126 ft 0 in (38.40 m)
- Height: 24 ft 6 in (7.49 m)
- Wing area: 2,380 ft² (221 m²)
- Empty weight: 15,874 lb (7,260 kg)
- Loaded weight: 21,500 lb (9,772 kg)
- Max. takeoff weight: 27,386 lb (12,422 kg)
- Powerplant: 4 × Liberty L-12 400 hp (300 kW) water-cooled V-12 engines, 400 hp (298 kW) each
- Maximum speed: 90 mph (78 kn, 152 km/h)
- Stall speed: 62 mph (54 kn, 100 km/h)
- Range: 1,470 mi (1,278 nmi, 2,352 km)
- Service ceiling: 4,500 ft (1,370 m)
- Wing loading: 11.5 lb/ft² (56.3 kg/m²)
- Power/mass: 0.06 hp/lb (10 W/kg)
Machine guns in bow and rear cockpits
- "Soon the NC-l would establish a record by carrying 51 men aloft, including the first deliberate stowaway in aviation history."
- Holmes, 2005. p 63.
- "Chapter II - A Boat With Wings, p. 24." The Flight Across the Atlantic. Hammpondsport, New York: Curtiss Aeroplane and Motor Corporation, 1919.
- Taylor 1954, p. 56.
- "The First Flight Across the Atlantic." Naval Historical Center. Retrieved: 11 July 2007. "
- Taylor 1954, p. 59.
- Taylor 1954, p. 65.
- The First Flight Across the Atlantic May 1919
- Holmes, Tony. Jane's Vintage Aircraft Recognition Guide. London: Harper Collins, 2005. ISBN 0-00-719292-4.
- Steirman, Hy and Glenn D. Kittler. The First Transatlantic Flight, 1919, (originally Triumph). New York: Richardson & Sterman, 1986, first edition 1961. ISBN 0-931933-19-6.
- Taylor, Theodore. The Magnificent Mitscher. Annapolis, Maryland: Naval Institute Press, 1954. ISBN 1-59114-850-2.
- Wagner, Ray. American Combat Planes. New York: Doubleday, 1982, ISBN 0-385-13120-8.
|Wikimedia Commons has media related to: Curtiss NC|
- "The U.S. Navy Flying-Boat, N.C. 1" (PDF). Flight XI (20): 637–639. May 15, 1919. No. 542. Retrieved January 12, 2011. Contemporary technical description of the NC-1 in its original three-engine configuration, with photographs and drawings.