November, 1917—Conference between navy and Curtiss engineers at Washington, D. C.
January, 1918—Working model tested in wind-tunnel. Found practical.
October, 1918—Trial flight of NC-1 at Rockaway Beach, Long Island.
November, 1918—NC-1 makes long-distance trip from Rockaway to Anacostia, D. C., 358 miles, in 5 hours 19 minutes.
February, 1919—-NC-2 climbs 2,000 feet in five minutes.
February 24, 1919—Secretary of Navy orders four planes to be prepared for transatlantic flight.
April 3, 1919—-NC-2 found to be impractical in design of hull, and is taken out of the flight. NC-3 and NC-4 assembled at Rockaway.
May 7—NC-4 damaged by fire while in hangar. Wings replaced. Elevators repaired.
May 8—Three planes leave Rockaway for Trepassey Bay, Newfoundland.
May 8—NC-3 and NC-4 arrive at Halifax, N. S. (450 miles).