There are 11 Quad City Ultralight Acft CHALLENGER I 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 1992 and 2010.
N780MA
2010 Adams M/Bardin B CHALLENGER I
Pleasant View, UT
N154MB
1995 Quad City Ultralight Acft Corp CHALLENGER I
Belvidere, IL
N4521G
1995 Quad City Ultralight Acft Corp CHALLENGER I
Fayetteville, NC
N171DP
1994 Quad City Ultralight Acft Corp CHALLENGER I
Baytown, TX
N6124A
1992 Quad City Ultralight Acft Corp CHALLENGER I
Temple, TX
N2706B
Bracken Harold E CHALLENGER I
Toulon, IL
N387GK
Kurrle James E CHALLENGER II
Sherrard, IL
N484CB
Quad City Ultralight Acft Corp CHALLENGER I
Louisville, KY
N610RG
Gilson Ronald V CHALLENGER 1
Cheektowaga, NY
N911UL
Quad City Ultralight Acft Corp CHALLENGER I
Moorhead, MN
N935TB
Heath Sabin CHALLENGER I
Mallard, IA