ation ▁code ▁was ▁[ Ha - 3 1 ]. ▁ ▁Design ▁and ▁development ▁The ▁M K 2 A ▁Zu ise i ▁engine ▁was ▁a ▁ 1 4 - cy l inder , ▁super charg ed , ▁air - co o led ▁two - row ▁radial ▁engine ▁with ▁a ▁ 1 4 0   mm ▁( 5 . 5   in ) ▁bore ▁and ▁ 1 3 0   mm ▁( 5 . 1 2   in ) ▁stroke ▁for ▁a ▁disp lacement ▁of ▁ 2 8 L ▁( 1 , 7 1 0 ci ) ▁and ▁a ▁nom inal ▁power ▁rating ▁of ▁ 8 0 5   k W ▁( 1 0 8 0   hp ) ▁for ▁take off ▁and ▁ 7 8 7   k W ▁( 1 0 5 5   hp ) ▁at ▁ 2 8 0 0 ▁meters ▁( 9 1 8 5 ▁feet ). ▁ ▁M its ub ishi ▁used ▁the ▁standard ▁design ation ▁system ▁to ▁identify ▁this ▁engine ▁while ▁it ▁was ▁under ▁development . ▁The ▁M K 2 ▁design ation ▁starts ▁with ▁the ▁Man ufact urer ' s ▁assigned ▁identification ▁letter , ▁in ▁this ▁case , ▁" M " ▁for ▁M its ub ishi , ▁followed ▁by ▁a ▁letter ▁that ▁ident ifies ▁the ▁engine ▁arrangement , ▁in ▁this ▁case ▁" K " ▁for ▁air - co o led , ▁and ▁then ▁the ▁sequ entially ▁assigned ▁design ▁number , ▁in ▁this ▁case ▁" 2 " ▁for ▁the ▁second ▁design . ▁Re vis ions ▁to ▁the ▁engine ▁are