5 ▁was ▁one ▁of ▁the ▁few ▁art illery ▁tra ctors ▁specifically ▁designed ▁by ▁the ▁Soviet ▁government ▁for ▁its ▁role . ▁With ▁over ▁ 9 9 0 0 ▁built , ▁it ▁was ▁the ▁most - produ ced ▁Soviet ▁‘ mil it ary ’ ▁tra ctor ▁during ▁the ▁war . ▁ ▁Description ▁ ▁The ▁ST Z - 5 ▁features ▁a ▁fully ▁en closed ▁metal , ▁two ▁person ▁crew ▁compart ment ▁( c ab ▁over ▁engine ▁design ) ▁with ▁a ▁flat ▁wood ▁cargo ▁bed ▁with ▁drop ▁down ▁wood ▁side ▁walls . ▁The ▁MA - 1 ▁mult if uel ▁engine ▁( 7 . 4 ▁l . ▁ 4 ▁in - line ▁cyl ind ers ) ▁was ▁r ated ▁at ▁ 5 2 HP ▁( 3 8 . 8   k W ) ▁at ▁ 1 2 5 0 ▁r pm . ▁The ▁ST Z - 5 ▁was ▁r ated ▁to ▁carry ▁ 1 . 5 ▁t onnes ▁of ▁cargo ▁on ▁its ▁bed ▁or ▁to w ▁ 8 ▁t onnes ▁or ▁less . ▁Under ▁optim um ▁conditions ▁its ▁ 6 ▁g ear ▁transmission ▁( 5 ▁forward , ▁ 1 ▁reverse ) ▁could ▁yield ▁a ▁maximum ▁speed ▁of ▁ 2 5 ▁km / h ▁( 1 5   m ph ). ▁It ▁had ▁an ▁oper ational ▁range ▁of ▁ 1 4 0   km . ▁ ▁Development ▁ ▁The ▁ST Z - 5 ▁was ▁designed ▁at ▁the ▁St aling rad ▁tra ctor ▁factory ▁with ▁initial ▁work ▁on ▁the ▁project ▁beginning ▁in ▁ 1 9 3 3 . ▁The ▁design