▁— ▁Russia ▁ ▁W ▁▁ ▁Walter ▁ ▁Walter ▁Eng ines ▁— ▁Czech ▁Republic ▁ ▁W ank el ▁AG ▁ ▁War bird s - eng ines ▁( C es ky ▁zn ale ck y ▁inst itut ▁s . r . o .) ▁ ▁Warner ▁A ircraft ▁— ▁US ▁ ▁W AS AG ▁ ▁Wel ch ▁ ▁Well s ▁& ▁Adams ▁ ▁Werner ▁ ▁West ▁Engineering ▁ ▁Western ▁ ▁West ing house ▁Electric ▁Corporation ▁— ▁US ▁ ▁White head ▁ ▁W ick ner ▁ ▁W iley ▁Post ▁ ▁Wil k sch ▁ ▁Kra utter ▁ ▁Robinson ▁ ▁Williams ▁ ▁Williams ▁International ▁— ▁US ▁ ▁Wisconsin ▁Motor ▁Man ufact uring ▁Company ▁ ▁Wol se ley ▁Mot ors ▁— ▁UK ▁ ▁Wright ▁Aer onaut ical ▁ ▁Wright ▁Company ▁ ▁Wright - G y ps y ▁ ▁Wright - H is so ▁ ▁Wright - More house ▁ ▁Wright - S iem ens ▁ ▁Wright - T utt le ▁ ▁X ▁▁ ▁X A EC ▁— ▁China ▁ ▁X C OR ▁A eros pace ▁ ▁Y ▁▁ ▁Yam aha ▁Motor ▁Corporation ▁— ▁Japan ▁ ▁York ▁ ▁Z ▁▁ ▁Z anz ot tera ▁Techn ologies ▁— ▁Italy ▁ ▁Z lin ▁ ▁Zo che ▁ ▁Z ünd app ▁ ▁References ▁ ▁Notes ▁ ▁Bibli ography ▁▁ ▁C liche , ▁Andre : ▁Ul tr al ight ▁A ircraft ▁Sho pper ' s ▁Guide ▁ 8 th ▁Edition ▁Cy b air ▁Limited ▁Publishing , ▁ 2 0 0 1 . ▁▁▁ ▁G unst on , ▁Bill . ▁World ▁Encyc lo pa edia