There are 5 Kittyhawk KHP-4 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.
N923KH
Kittyhawk Corp KHP-4
Palo Alto, CA
N924KH
Kittyhawk Corp KHP-4
Palo Alto, CA
N926KH
Kittyhawk Corp KHP-4
Palo Alto, CA
N927KH
Kittyhawk Corp KHP-4
Palo Alto, CA
N928KH
Kittyhawk Corp KHP-4
Palo Alto, CA