chant ▁ships ▁of ▁Singapore ▁Category : Miss ing ▁ships ▁Category : Sh ips ▁lost ▁with ▁all ▁hands ▁Category : Mar itime ▁inc idents ▁in ▁ 1 9 5 5 <0x0A> </s> ▁The ▁P Z L . 3 ▁was ▁a ▁Polish ▁project ▁for ▁a ▁four - engine ▁heavy ▁bom ber , ▁designed ▁by ▁W ład ys ław ▁Z ale w ski ▁from ▁ 1 9 2 8 - 1 9 3 0 ▁at ▁P Z L ▁( Pa ństw owe ▁Zak ł ady ▁Lot nic ze ▁- ▁National ▁A viation ▁Est ab lish ments ). ▁ ▁Design ▁and ▁development ▁At ▁the ▁time ▁of ▁the ▁formation ▁of ▁P Z L ▁the ▁Department ▁of ▁Aer onaut ics ▁gave ▁the ▁nas cent ▁design ▁office ▁the ▁task ▁of ▁design ing ▁a ▁heavy ▁bom ber . ▁Draw ing ▁heavily ▁on ▁his ▁ 1 9 2 4 ▁W Z - IX ▁P ter an odon ▁bom ber , ▁Z ale w ski ▁was ▁given ▁the ▁task ▁as ▁designer . ▁During ▁the ▁winter ▁of ▁ 1 9 2 8 - 2 9 ▁the ▁detailed ▁design ▁of ▁the ▁P Z L . 3 ▁bom ber ▁took ▁shape , ▁emer ging ▁as ▁a ▁large ▁aircraft ▁power ed ▁by ▁four ▁ ▁Br istol ▁Jup iter ▁engines ▁mounted ▁in ▁tan dem ▁in ▁nac elles ▁on ▁p yl ons ▁above ▁the ▁wings . ▁Due ▁to ▁the ▁dire ▁economic ▁situation ▁at ▁the ▁start ▁of ▁the ▁ 1 9 3 0 s ▁and ▁the ▁expected ▁high ▁costs , ▁funds ▁for ▁construction ▁of ▁a ▁prototype ▁were ▁not ▁forth coming