
In 1980, the two seat S-14 Junior program began, as a reduced version of the previous S-12C / D / E with folding wings for road transport, with composite materials.
Registered N14NX and powered by a Lycoming O-320, Spencer went on a maiden flight on November 4, 1983, at the age of 86. Even with modifications, the design did not meet expectations and the program was terminated in 1984.

Spencer and Anderson had invested nearly $85,000 in the project, but friend William Randolph Hearst Jr purchased the Junior for salvage price of $25,000 and donated it to EAA Museum in 1984.