Udet U 12b Flamingo (Spezial) - D-822 Uetz U2V - HB-SVM Ullrich Auriga FT - N512EA Ultimate      10-200 - OY-CMP      20-300S - N8UB Ultracraft Calypso 1A - OO-D36 Ultraflight Lazair SS EC - N911MP Ultralair Weedhopper AX3 - OO-B30 Ultralight Aviation SkyDart SD-2 - 19-4286 Ultravia      Pélican PL - PH-VKL      Pélican PL914 - C-FZMY - C-GDAD Umbaugh 18 - CF-SIU - N106U - (see also Air & Space and Fairchild U-18) United Consultants UC-1 Twin Bee - N87589 Unknown - photo Upson Kite Balloon - USASC: "24" Usuelli T-34 Roma - USAAS: photo Utva      66 - C-FMIG - C-GEQV - N404RC      75 - YU-DEW      Aero-3 - Yugoslav AF: 40101 - YU-CYB