▁and ▁large - area ▁F ow ler - type ▁trailing ▁edge ▁f laps , ▁giving ▁a ▁take - off ▁run ▁of ▁ 2 2 5 ▁feet ▁and ▁a ▁landing ▁run ▁of ▁only ▁ 2 0 0 ▁feet . ▁ ▁The ▁first ▁P ione er ▁CC . 1 ▁to ▁be ▁delivered ▁to ▁the ▁R AF , ▁on ▁ 1 1 ▁August ▁ 1 9 5 3 , ▁was ▁serial led ▁X E 5 1 2 . ▁Iron ically , ▁X E 5 1 2 ▁was ▁essentially ▁the ▁prototype ▁Pr est wick ▁P ione er ▁I ▁from ▁ 1 9 4 7 , ▁re - eng ined ▁with ▁the ▁Al vis ▁Leon ides ▁engine , ▁and ▁ref urb ished ▁for ▁R AF ▁use . ▁( Th us , ▁V L 5 1 5 ▁became ▁G - AK BF , ▁ ▁and ▁then ▁returned ▁to ▁a ▁military ▁serial ▁as ▁X E 5 1 2 ). ▁The ▁next ▁three ▁aircraft ▁delivered ▁( construct ors ▁numbers ▁ 1 0 2 , ▁ 1 0 3 ▁and ▁ 1 0 4 ) ▁were ▁like wise ▁the ▁second ▁prototype ▁V L 5 1 6 / G - AN A Z ▁plus ▁the ▁partly ▁completed ▁third ▁and ▁fourth ▁pro tot ypes ▁V L 5 1 7 ▁and ▁V L 5 1 8 . ▁As ▁X E 5 1 3 , ▁X E 5 1 4 ▁and ▁X E 5 1 5 ▁they ▁were ▁delivered ▁on ▁ 1 5 ▁August ▁ 1 9 5 3 , ▁ 3 ▁September ▁ 1 9