There are 6 Pterodynamics X-P4 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.
N561PD
Pterodynamics INC X-P4
Colorado Springs, CO
N562PD
Pterodynamics INC X-P4
Colorado Springs, CO
N563PD
Pterodynamics INC X-P4
Colorado Springs, CO
N564PD
Pterodynamics INC X-P4
Colorado Springs, CO
N565PD
Pterodynamics INC X-P4
Manassas, VA
N566PD
Pterodynamics INC X-P4
Colorado Springs, CO