The 49.2 ft (15 m) span wings consist of fiberglass skins built around a carbon fiber and aluminium spars.
The powerplant is a Kohler Company engine of 28 hp (21 kW) that drives a folding two-bladed propeller.
The engine is mounted in pusher configuration behind the cockpit, with the tail boom running underneath the propeller.
The landing gear consists of two small wheels mounted in tandem on the fuselage centerline.
The prototype S-2 is no longer on the Federal Aviation Administration registry, but at least eight were built and in July 2011 six remain on the US register, including three S-2s and three S-2As.