There are 4 Piper PA-11S 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 1947 and 1949.
N5538H
1949 Piper PA-11S
Scranton, ND
N4987H
1948 Piper PA-11S
Auburn, WA
N4504M
1947 Piper PA-11S
Newburgh, ME
N5556H
Piper PA-11S
Paxton, MA