AERO-ALPHABET - Un

Union (Union Aircraft Company - Сполучені Штати Америки)
Union Rotorplane

Union (Union-Flugzeugwerke Gesellschaft mit Beschränkter Haftung - Німеччина)
Union Arrow Biplane
Union G.1

UNIS (Unis Obchodni Spol s.r.o. - Чехія)
UNIS 40 Bongo

United (Tips & Smith Incorporated - Сполучені Штати Америки)
United Biplane 1927

United (United Aircraft Corporation - Сполучені Штати Америки)
U.A.C. Special
United Lark

United Consultants (United Consultants Corporation - Сполучені Штати Америки)
United Consultants Twin Bee

United Eastern (United Eastern Aeroplane Company - Сполучені Штати Америки)
United Eastern A-M Tractor

Universal (Universal Aircraft - Сполучені Штати Америки)
Universal American Flea Ship

Universal (Universal Aircraft - Сполучені Штати Америки)
Universal Meteor
Universal Model 1
Universal Model 2
Universal Model 5
Universal Model 90
Universal Model 90
Universal Model 110 Special
Universal Model 201
Universal Model 218
Universal Model 275
Universal Model 1344
Universal Model D
Universal Model G
Universal Model G Deluxe
Universal Model H
Universal Model H Special
Universal Monocoupe Model 22
Universal Monocoupe Model 70
Universal Monocoupe Model 113
Universal Monocoupe Model 125
Universal Monocoupe Model 145
Universal Monoprep
Universal Monosport

Universal (Universal Aircraft Company - Сполучені Штати Америки)
Universal 98 Trainer

University of Berlin (University of Berlin - Німеччина)
Berlin B.9

University of Maryland (University of Maryland - Сполучені Штати Америки)
University of Maryland Gamera Human Powered Helicopter

University of Minnesota (University of Minnesota - Сполучені Штати Америки)
University of Minnesota T-1

University of Toronto Institute for Aerospace Studies (University of Toronto Institute for Aerospace Studies - Канада)
U.T.I.A.S. Ornithopter № 1
U.T.I.A.S. S.H.A.R.P.

Unruh-Albright (Marion Unruh & George Albright - Сполучені Штати Америки)
Unruh-Albright Pretty Prairie Special 1
Unruh-Albright Pretty Prairie Special 2
Unruh-Albright Pretty Prairie Special 3