There are 5 Rans Designs S-9 CHAOS 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 2002 and 2008.
N651DW
2008 Westwood Dave RANS S-9
Red Lodge, MT
N19634
2006 Meinhardt Richard P S-9 CHAOS
Clarence, NY
N1100P
2002 Anderson Gerald D RANS S-9
Two Harbors, MN
N2034K
Wratchford Philip RANS S-9
Fults, IL
N415CK
Donald Knop RANS S9 CHAOS
Vernal, UT