The aircraft was put into storage due to wartime restrictions in effect in the US during World War II.

The unit had a build cost of $8700.00 The S-12-D Aircar is an improved and larger four-seat aircraft, which retains the basic layout of the Seabee.

Its design did not meet expectations and the sole example was donated to the EAA AirVenture Museum in Oshkosh, Wisconsin.

[citation needed] The Air Car is built from wood, steel and glass-fibre.

It has a strut-braced high wing and the cabin and fuel-carrying floats are similar to the Seabee, but the tail unit is more angular and a retractable tricycle undercarriage is fitted.