writer ▁ ▁K ory ▁Cas to ▁( born ▁ 1 9 8 1 ), ▁American ▁baseball ▁player ▁ ▁Mar tha ▁C urn utt ▁Cas to ▁( 1 8 1 2 – 1 8 8 7 ), ▁American ▁murder er ▁ ▁Places ▁▁ ▁Cas to , ▁Lomb ard y , ▁Italy <0x0A> </s> ▁The ▁F ok ker ▁D . X II ▁was ▁a ▁Dutch ▁single ▁seat , ▁single ▁engine ▁f ighter ▁aircraft ▁designed ▁to ▁an ▁American ▁specification ▁which ▁called ▁for ▁the ▁use ▁of ▁a ▁Curt iss ▁D - 1 2 ▁engine , ▁designated ▁P W - 7 . ▁Despite ▁considerable ▁efforts ▁to ▁improve ▁the ▁air frame , ▁F ok ker ▁failed ▁to ▁win ▁the ▁USA AS ▁competition . ▁ ▁Design ▁and ▁development ▁The ▁D . X II ▁ow ed ▁its ▁existence ▁to ▁the ▁F ok ker ▁D . X I , ▁even ▁though ▁they ▁had ▁no ▁design ▁overlap ; ▁the ▁connection ▁was ▁that ▁the ▁earlier ▁aircraft ▁had ▁some ▁success ▁when ▁submitted ▁to ▁the ▁USA AS ' s ▁call ▁for ▁entr ants ▁in ▁its ▁P W - 7 ▁specification ▁competition , ▁an ▁order ▁for ▁three ▁resulting . ▁The ▁D . X II ▁was ▁intended ▁from ▁the ▁start ▁to ▁meet ▁this ▁specification ▁and ▁was ▁designed ▁around ▁the ▁required ▁Curt iss ▁D - 1 2 ▁engine . ▁ ▁Initial ly , ▁the ▁D . X II ▁was , ▁like ▁the ▁D . X I , ▁a ▁single ▁bay ▁ses qui plane ▁but ▁its ▁wings ▁were ▁different ▁in ▁plan ▁and ▁construction . ▁ ▁The ▁upper ▁wing ▁was ▁straight