Curtiss Model S

The Curtiss Model S (also known as Speed Scout or Model 10) was a single-seat fighter aircraft.

Development and design
The Model S was Curtiss' first attempt at a fast and maneuverable single-seat fighter. The first variant, S-1, had disappointing performance. In March 1917, new wings were attached to the S-1 fuselage and the project was redesignated S-2. In 1917, the S-3 became the first triplane in service in the United States. In 1918 and 1919, Curtiss experimented with seaplane versions of the S-3, designated S-4 and S-5. The S-6 was intended to be an improved S-3, but performance was poor and of the 12 ordered by the USASC, only 1 was delivered.

Variants

 * S-1 Speed Sout: Biplane, unarmed
 * S-2 Wireless : Biplane, updated S-1 lacked wing wires. First flight in March 1917.
 * S-3 : Model 10 - Triplane derived from S-2. Four built.
 * S-4 : Model 10A - Seaplane version of S-3 with 2 main floats
 * S-5 : Model 10B - Seaplane version of S-3 with 1 main central float and two wingtip floats.
 * S-6 : Model 10C - Triplane, improved S-3