[9] The new company's first aircraft was the S-T Sport Trainer,[10] a low-wing tandem-seat monoplane with a 95 hp (71 kW) Menasco B-4 Pirate straight-4 engine.In 1937 and 1938, a second civilian aircraft model was introduced, the S-C Sport Coupe, or SC-W with a 145 hp (108 kW) Warner Super Scarab radial engine.Thirteen examples of the SC-W were built, although the last one was assembled from surplus parts decades after the initial production run was finished.[11] In the immediate postwar years, Ryan bought the rights to the Navion light aircraft from North American Aviation, selling it to both military and civilian customers.[11]: 237 Northrop Grumman purchased Teledyne Ryan in 1999, with the products continuing to form the core of that firm's unmanned aerial vehicle efforts.