The Speedster had been designed for performance, so the company focused on another, more basic, model to provide reliable income.

As the Rearwin company was occupied trying to certify the Speedster, initial work was contracted out to Henry Weeks of Stevenson-Weeks Air Service.

This required enlarging the vertical tail after the test aircraft nearly failed to recover from a flat spin.

Initially the engine was left uncovered but Townend rings and a propeller spinner were an option on the Deluxe model; a 1939 redesign introduced the streamlined NACA cowling.

Ken Rearwin purchased the prototype Sportster and donated it to the Airpower Museum in Blakesburg, Iowa.

[8] Data from [9]General characteristics Performance Media related to Rearwin Sportster at Wikimedia Commons