▁the ▁S par row jet ▁first ▁fle w ▁on ▁ 1 4 ▁December ▁ 1 9 5 3 . ▁ ▁Other ▁modifications ▁included ▁a ▁new ▁tail ▁section ▁and ▁front ▁fus el age ▁( in ▁place ▁of ▁the ▁S par row h awk ' s ▁single ▁engine ), ▁fixed , ▁fa ired - in ▁under car riage ▁and ▁a ▁large ▁clear ▁can opy . ▁ ▁The ▁wing ▁roots ▁were ▁modified ▁to ▁take ▁the ▁Pal as ▁engines . ▁ ▁Oper ational ▁history ▁ ▁Air ▁racing ▁history ▁ ▁The ▁prototype ▁M . 5 ▁S par row h awk ▁G - AD NL ▁was ▁bought ▁by ▁Fred ▁D unker ley ' s ▁Old ham ▁Ty re ▁Cord ▁Company ▁in ▁January ▁ 1 9 5 1 . ▁It ▁was ▁modified ▁to ▁M . 7 7 ▁S par row jet ▁standard , ▁and ▁first ▁flow n ▁by ▁D unker ley ▁in ▁air ▁races ▁during ▁the ▁Go ody ear ▁Air ▁Challenge ▁Tro phy ▁at ▁Sh ore ham ▁on ▁ 2 8 ▁August ▁ 1 9 5 4 . ▁It ▁fle w ▁for ▁display ▁at ▁Bag inton ▁during ▁the ▁Royal ▁A ero ▁Club ▁race ▁in ▁July ▁but ▁had ▁been ▁prevent ed ▁from ▁racing ▁ow ing ▁to ▁an ▁air ▁st arter ▁fault . ▁He ▁won ▁the ▁S B AC ▁Challenge ▁Cup ▁at ▁Y ead on , ▁West ▁York shire ▁in ▁ 1 9 5 6 ▁and ▁the ▁King ' s ▁Cup ▁Race ▁in ▁ 1 9 5 7 ▁with ▁a ▁top ▁speed ▁of ▁ 2 2 8   m ph ▁( 3