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w-78 vs. W-88 Trident D5 - Comparison of sizes
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w-78
W-88 Trident D5

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w-78
W-88 Trident D5
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w-78

w-78
w-78
Blast Radius Blast Radius4950km
Fireball Radius Fireball Radius 0.630km
Height Height21,3m
Kilotons Kilotons350kt
Radiation Radius Radiation Radiuskm

The W78 thermonuclear warhead is the warhead used on most of the United States LGM-30G Minuteman III intercontinental ballistic missiles (ICBMs), along with the MK-12A reentry vehicle which carried the warhead. Minuteman IIIs initially deployed with the older W62 warhead; the W78 was deployed starting in December 1979 onto 300 missiles, three warheads per missile. Declassified records indicate a total of 1,083 W78s were produced. The W78 was designed at Los Alamos National Laboratory starting in 1974.



The design is thought to combine the secondary (fusion) stage design of older ICBM warheads such as the W50 with a more modern primary stage (see Teller-Ulam design for more details). The W78 has a publicly announced yield of 335–350 kilotons of TNT (1.40–1.46 PJ).Dimensions of the W78 are unknown, but it fits within the MK-12A reentry vehicle, which is conically shaped, 21.3 inches in diameter at its base and 71.3 inches long. The W78 is estimated to weigh 700–800 pounds (317–363 kg).

Source: Wikipedia
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W-88 Trident D5

W-88 Trident D5
W-88 Trident D5
Blast Radius Blast Radius5.410km
Fireball Radius Fireball Radius 0.710km
Height Height1.75m
Kilotons Kilotons455kt
Radiation Radius Radiation Radiuskm
Weight Weight175-360kg

The W88 is a United States thermonuclear warhead, with an estimated yield of 475 kilotons (kt), and is small enough to fit on MIRVed missiles. The W88 was designed at the Los Alamos National Laboratory in the 1970s. In 1999, the director of Los Alamos who had presided over its design described it as "the most advanced U.S. nuclear warhead". As of 2014, the latest version is called the W88 ALT 370, and the first production unit is scheduled for December 2019.



The Trident II submarine-launched ballistic missile (SLBM) can be armed with up to 8 W88 warheads (Mark 5 re-entry vehicle) or 12 100 kt W76 warheads (Mark 4 re-entry vehicle), but it is limited to 8 warheads under the Strategic Offensive Reductions Treaty.

Source: Wikipedia

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