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Maker · data as of September 25, 2026

Underwood Harold

1 aircraft on the U.S. register. The most recent registration was March 8, 2022.

Models

THORP S-181

States

Missouri1

Registrations by year

0001112022

Aircraft newest first

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N444MA Underwood Harold
THORP S-18
Fixed-wing, single engine First Order Aeronautics LLC
Lees Summit, Missouri
Experimental 2022-03-08 Valid