▁use ▁as ▁a ▁bom ber ▁led ▁to ▁successful ▁launch es ▁from ▁aircraft ▁carri ers . ▁ ▁Begin ning ▁with ▁the ▁P 2 V - 5 F ▁model , ▁the ▁Ne pt une ▁became ▁one ▁of ▁the ▁first ▁oper ational ▁aircraft ▁fitted ▁with ▁both ▁p ist on ▁and ▁jet ▁engines . ▁The ▁Con v air ▁B - 3 6 , ▁several ▁Bo eing ▁C - 9 7 ▁Str at of re ighter , ▁Fair child ▁C - 1 2 3 ▁Pro vider , ▁and ▁Av ro ▁Sh ack leton ▁aircraft ▁were ▁also ▁so ▁equ ipped . ▁To ▁save ▁weight ▁and ▁complexity ▁of ▁two ▁separate ▁fuel ▁systems , ▁the ▁West ing house ▁J 3 4 ▁jet ▁engines ▁on ▁P 2 V s ▁burn ed ▁the ▁ 1 1 5 – 1 4 5 ▁Av gas ▁fuel ▁of ▁the ▁p ist on ▁engines , ▁instead ▁of ▁jet ▁fuel . ▁The ▁jet ▁pod s ▁were ▁fitted ▁with ▁int ake ▁doors ▁that ▁remained ▁closed ▁when ▁the ▁J - 3 4 s ▁were ▁not ▁running . ▁This ▁prevent ed ▁wind m illing , ▁allowing ▁for ▁econom ical ▁p ist on - engine - only ▁long - end urance ▁search ▁and ▁pat rol ▁operations . ▁In ▁normal ▁US ▁Navy ▁operations , ▁the ▁jet ▁engines ▁were ▁run ▁at ▁full ▁power ▁( 9 7 %) ▁to ▁ass ure ▁take off , ▁then ▁shut ▁down ▁upon ▁reaching ▁a ▁safe ▁alt itude . ▁The ▁j ets ▁were ▁also ▁started ▁and ▁kept ▁running ▁at ▁flight ▁idle ▁during ▁low - alt itude ▁( ▁during ▁the ▁day