Rare footage of the Mk-21 thermonuclear bomb. – Russia today Posting in CHAT: RussiaThe aerial bomb was created on the basis of the TX-21 “Shrimp” prototype tested at Castle Bravo on Bikini Atoll in 1954. Length – 3.7 m, diameter – 1.5 m, weight – 8 tons. Power of version Y1 is from 15 to 18 Mt, version Y2 – 4.5 Mt. Produced from 1955 to 1956, 275 units were produced. In 1957, the bombs were converted into the more advanced Mk-36. Original source Source link