BF ) ▁of ▁over ▁ 5 . 5 ▁years ▁. ▁▁ ▁The ▁S ovi ets ▁had ▁much ▁larger ▁rock ets ▁and ▁could ▁use ▁vac u um ▁tub es ▁( ther m ionic ▁val ves ) ▁in ▁their ▁guidance ▁systems . ▁( The ▁weights ▁of ▁the ▁Min ut eman ▁I ▁and ▁II ▁remain ▁class ified , ▁but ▁the ▁Min ut eman ▁III ▁was ▁ 3 5 , 0 0 0   kg ▁versus ▁the ▁Soviet ▁R - 7 ▁miss ile ▁( 1 9 5 9 ) ▁of ▁ 2 8 0 , 0 0 0   kg .) ▁The ▁US ▁pl ann ers ▁had ▁to ▁choose ▁either ▁to ▁develop ▁solid ▁state ▁guidance ▁systems ▁( which ▁we igh ▁less ) ▁or ▁consider ▁the ▁additional ▁cost ▁and ▁time ▁delay ▁of ▁developing ▁larger ▁rock ets . ▁ ▁Spec ifications ▁Min ut eman ▁I ▁D - 1 7 B ▁computer ▁specific ations ▁ ▁Year : ▁ 1 9 6 2 ▁ ▁The ▁D 1 7 B ▁is ▁a ▁synchron ous ▁serial ▁general - pur pose ▁digital ▁computer . ▁ ▁Man ufact urer : ▁ ▁Aut on et ics ▁Division ▁of ▁North ▁American ▁A viation ▁ ▁App lications : ▁ ▁Gu id ance ▁and ▁control ▁of ▁the ▁Min ut eman ▁I ▁IC B M . ▁ ▁Program ming ▁and ▁numerical ▁system : ▁Number ▁system : ▁Binary , ▁fixed ▁point , ▁ 2 ' s ▁complement ▁Log ic ▁levels : ▁ <0x09> 0 ▁or ▁False , ▁ 0 V ; ▁ 1 ▁or ▁True , ▁- 1 0 V ▁Data