There are 3 Ayres S2R-T11 aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 1979 and 1980.
N40173
1980 Ayres Corporation S2R-T11
Hamlin, TX
N4018Y
1980 Ayres Corporation S2R-T11
Milford, IA
N4016H
1979 Ayres Corporation S2R-T11
Nunica, MI