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Two TF-80C-1-LOs (48-356 c/n 580-5001 and 48-373 c/n 580-5018) were modified as Model 780 all weather fighter prototypes and were initially designated ETF-80C, chanching to ET-33A when the TF-80C became T-33A on January 1, 1949. First flown from Van Nuys airport, California, USA, on April 16, 1949, by Tony LeVier and Glenn Fulkerson. The first 17 production models were designated F-94A-1-LO, so the two prototypes unofficially became known as YF-94-LO. |
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