The Spencer Amphibian Air Car is an American light amphibious aircraft.

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.

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.