Разве пороховых?

ПО времени готовности, ещё же и гироскопы надо раскрутить. Вот здесь по времени и степени готовности ракет времён кубинского кризиса:

The first public display of this system was in November 1960, and they were deployed to Cuba in the fall of 1962 during the Cuban Missile Crisis. The first five regiments with surface-based R-12 missiles were put on alert in May 1960, while the first regiment of silo-based missiles was placed on alert in January 1963. Their reaction time was assessed by the West at one to three hours in the normal soft-site readiness condition, and five to fifteen minutes in the normal hard-site readiness condition. The allowable hold time in a highly alert condition (reaction time equals three to five minutes) was long—many hours for soft sites, and days for hard sites.
Можно предположить несколько часов для КНДР на заправку и минуты на "раскрутку".