Maker · data as of October 2, 2026

Weeks

5 aircraft on the U.S. register. The most recent registration was September 25, 2025.

THORP T-182S-1W1KELEHER LARK JK-1A1DER JAGER D-IX1

THORP T-18 · S-1W · KELEHER LARK JK-1A · DER JAGER D-IX

Florida2Washington1Texas1

Aircraft newest first

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N88BW	Weeks THORP T-18	Fixed-wing, single engine	Withheld at owner's request	Experimental	2025-09-25	Valid
N77RW	Weeks KELEHER LARK JK-1A	Fixed-wing, single engine	Individual owner Texas	Experimental	2023-08-20	Valid
N9996Q	Weeks THORP T-18	Fixed-wing, single engine	Individual owner Washington	Experimental	2020-04-21	Valid
N30KW	Weeks DER JAGER D-IX	Fixed-wing, single engine	Individual owner Florida	Experimental	1989-01-30	Valid
N69KW	Weeks S-1W	Fixed-wing, single engine	Individual owner Florida	Experimental	1978-02-23	Valid