The U.S. aircraft register, updated daily · Carbon Free Flight by 2050
Maker · data as of October 2, 2026

Keller Frederick H

2 aircraft on the U.S. register. The most recent registration was July 15, 2019.

Models

FK 1 STOL1DEFIANT (KELLER)1

FK 1 STOL · DEFIANT (KELLER)

States

Wisconsin1Washington1

Registrations by year

0001112019

Aircraft newest first

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N4XK Keller Frederick H
FK 1 STOL
Fixed-wing, single engine Co-owned owner
Washington
Experimental 2019-07-15 Valid
N3XK Keller Frederick H
DEFIANT (KELLER)
Fixed-wing, multi-engine Individual owner
Wisconsin
Experimental 1999-06-16 Valid