Prvi let ikonskog Spitfirea bio je u Southamptonu 5. ožujka 1936. a isporuka je počela u lipnju 1938. godine. Tvornica u Woolstonu nije mogla zadovoljiti sva potraživanja te se gradi još jedna u Castle Bromwichu pored Birminghama. Nakon što je Velika Britanija ušla u rat, proizvoidnja se dodatno ubrzala.
OTKRIVENA TAJNA TVORNICA IZ DRUGOG SVJETSKOG RATA: Ovdje se gradio lovac koji je spašavao Britance
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Sva proizvodnja koja je to mogla biti preseljena je na sjever Britanije, van dometa njemačkih bombardera ili pod zemlju. Na jedan takav zapušteni pogon pored Briminghama naletio je istraživač koji je želio ostati anoniman.
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Na sablasnim fotografijama vide se mračni, vlažni tuneli u kojima se proizvodio moćni Rolls-Roycov motor Merlin koji je pogonio Spitfire sve do konca 1942. kada se počinju proizvoditi varijante s motorom Griffon. U podzemnim hangarima još se mogu vidjeti ostaci industrijske opreme, namještaj i materijali.
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Iako vojni analitičari ističu kako je u Bitci za Britaniju mnogo važniju ulogu odigrao drugi britanski lovac jednosjed – Hawker Hurricane - koji je u bio daleko brojniji, Spitfire je zauvijek ušao u legendu, između ostalog i zbog svog karakterističnog oblika.
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