el age ▁built ▁up ▁from ▁p ly ▁v ene ers . ▁ ▁The ▁T abor ▁was ▁originally ▁planned ▁as ▁a ▁bi plane ▁power ed ▁by ▁four ▁ 6 0 0   hp ▁Sid de ley ▁T iger ▁engines . ▁However ▁del ays ▁in ▁development ▁of ▁the ▁engines ▁meant ▁these ▁would ▁be ▁un available ▁and ▁so ▁the ▁aircraft ▁was ▁red es igned ▁to ▁use ▁six ▁ 4 5 0   hp ▁Nap ier ▁Lion ▁engines ▁to ▁give ▁a ▁similar ▁power / weight ▁ratio , ▁and ▁a ▁third , ▁upper ▁wing ▁added . ▁ ▁The ▁final ▁design ▁had ▁a ▁wings pan ▁of ▁over ▁ 1 3 1   ft ▁( 4 0 ▁m ), ▁with ▁the ▁central ▁wing ▁of ▁much ▁greater ▁span ▁than ▁the ▁other ▁two . ▁Four ▁engines ▁were ▁mounted ▁in ▁push ▁pull ▁configuration ▁pairs ▁between ▁the ▁lower ▁and ▁middle ▁wings ▁with ▁the ▁other ▁two ▁mounted ▁in ▁tra ctor ▁configuration ▁between ▁the ▁middle ▁and ▁upper ▁wings , ▁directly ▁above ▁the ▁lower ▁pairs . ▁The ▁tra ctor ▁engines ▁used ▁two - bl aded ▁prop ell ors , ▁the ▁push ers ▁four - bl aded ▁ones . ▁With ▁the ▁end ▁of ▁the ▁war ▁conversion ▁to ▁a ▁passenger ▁aircraft ▁was ▁planned . ▁ ▁The ▁mon oco que ▁construction ▁gave ▁a ▁large ▁open ▁space ▁within ▁the ▁fus el age . ▁The ▁pil ots ▁were ▁situated ▁in ▁the ▁nose , ▁with ▁a ▁partition ▁separ ating ▁them ▁from ▁the ▁engineer ' s ▁station ▁and ▁the ▁engine ▁controls ▁mounted ▁on ▁either ▁side ▁of ▁the ▁opening ▁in ▁the ▁partition . ▁The ▁fuel