The Ryan S-C was a low-wing cantilever monoplane with a fixed tailwheel landing gear, designed to be an up-market version of the Ryan S-T trainer. The prototype first flew in 1937, and had a nose-mounted 150 hp (112 kW) Menasco inline piston engine. Production aircraft were fitted with a 145 hp (108 kW) Warner Super Scarab radial engine. With the company's involvement in producing trainer aircraft for the United States military, the S-C was not seriously marketed, and only 12 production aircraft were built. One example was impressed into service with the United States Army Air Forces, and was designated the L-10. At the start of the 21st Century, four examples were still airworthy in the United States.
S-C later S-C-M
Prototype powered by a 150hp (112kW) Menasco C4S inline engine, one built later converted to S-C-W.
Production aircraft powered by a 145hp (108kW) Warner Super Scarab radial engine, 12 built.
United States Army Air Forces designation for one S-C-W impressed into service in 1942.
Two SC-Ws exist with a horizontally opposed 6-cylinder Continental engine. One was modified from a radial-powered SC-W, and one was built with the 6-cylinder engine after WWII using spare airframe parts from the original pre-WWII production run.