▁identified ▁by ▁the ▁letter ▁following ▁the ▁preceding ▁design ation , ▁with ▁letter ▁" A " ▁being ▁the ▁original , ▁or ▁first , ▁version . ▁ ▁M its ub ishi ▁also ▁had ▁a ▁custom ▁to ▁name ▁its ▁engines ▁with ▁a ▁short ▁two ▁sy ll able ▁name ▁that ▁references ▁objects ▁found ▁in ▁the ▁sky . ▁The ▁naming ▁sequence ▁started ▁with ▁this ▁engine , ▁the ▁M K 2 ▁Zu ise i ▁" H oly ▁star ", ▁and ▁was ▁followed ▁in ▁order ▁by ▁the ▁M K 4 ▁Kin se i ▁" V en us " ▁and ▁the ▁M K 8 ▁K ase i ▁" M ars ". ▁ ▁Vari ants ▁ ▁M K 2 A ▁Zu ise i ▁ 1 1 ▁ ▁, ▁ 2 5 4 0   r pm ▁at ▁take off ,, ▁ 2 4 5 0   r pm ▁at ▁▁ ▁M K 2 B ▁Zu ise i ▁ 1 2 ▁ ▁, ▁ 2 5 4 0   r pm ▁at ▁take - off , ▁ 2 5 4 0   r pm ▁at ▁▁ ▁M K 2 C ▁Zu ise i ▁ 1 3 ▁ ▁, ▁ 2 7 0 0   r pm ▁at ▁take - off , ▁ 2 6 0 0   r pm ▁at ▁▁ ▁M K 2 C ▁Zu ise i ▁ 1 4 ▁Ha - 2 6 - I ▁ ▁, ▁ 2 6 5 0   r pm ▁at ▁take - off , ▁ 2 6 5 0   r pm ▁at ▁▁ ▁M