▁under car riage ▁legs ▁and ▁the ▁PA - 3 4 ▁had ▁str ut ▁mounted ▁split ▁ax les ▁with ▁o le o - p neum atic ▁shock - abs or bers ▁attached ▁to ▁the ▁top ▁fus el age ▁longer ons . ▁ ▁The ▁fus el age ▁was ▁constructed ▁of ▁w eld ed ▁steel ▁t ube ▁with ▁fabric ▁covering ▁and ▁light ▁al loy ▁fair ings . ▁The ▁ 3 - bl aded ▁fol ding ▁rot or ▁was ▁mounted ▁on ▁a ▁b rac ed ▁bi - pod ▁with ▁legs ▁fore ▁and ▁a ft ▁of ▁the ▁front ▁co ck pit . ▁The ▁tail ▁unit ▁consisted ▁of ▁a ▁very ▁wide ▁ch ord ▁fin ▁and ▁rud der ▁with ▁a ▁str ut ▁supported ▁tail - plane ▁sport ing ▁up - turn ed ▁wing - ti ps . ▁T ail ▁surfaces ▁were ▁constructed ▁of ▁wood ▁with ▁fabric ▁covering ▁and ▁rot or ▁bl ades ▁were ▁built ▁with ▁steel ▁t ube ▁sp ars ▁and ▁p lywood ▁rib s ▁with ▁fabric ▁covering . ▁ ▁Ac com mod ation ▁was ▁in ▁tan dem ▁co ck p its ▁with ▁the ▁pilot ▁in ▁the ▁rear ▁co ck pit ▁a ft ▁of ▁the ▁rot or ▁support ▁bi - pod ▁and ▁the ▁observer ▁in ▁the ▁front ▁co ck pit ▁beneath ▁the ▁rot or ▁head . ▁ ▁Power ▁was ▁supplied ▁by ▁a ▁nose - mount ed ▁ ▁Wright ▁R - 9 7 5 E - 2 ▁in ▁a ▁tight - f itting ▁wide ▁ch ord ▁cow ling ▁with ▁bl ister s ▁to ▁accommod ate ▁ro cker ▁arms . ▁The ▁engine