New Vihenia wrote:So.. i wonder if there's any gain in miniaturizing High yield (say 5 Megatons) nuclear warhead.
Given the improving accuracy of nuclear delivery vehicles (MIRV, RV, Bombers, etc) seemed to allow smaller yield weapon to "do the job" of the larger yield one.
What would you need to hit with 5 megatons? The only reason weapons in that range were developed was because the accuracy of the times was so low. If you need to destroy X target, and your CEP is size Y then you need yield Z to make sure X is inside the blast radius. As CEP's have decreased the needed yield Z has decreased, which means you can use less money and resources on larger warheads and instead make more warheads to hit more targets, or maintain the same capabilities at a lower cost.
The only reason to use such large warheads now is because you simply want to blow up a larger area with less weapons, which serves no real strategic purpose, and is inefficient. Remember the blast front propagates in three directions, but most targets are only spread out over two, and you could potentially hit more area using more missiles with smaller warheads.
You don't really have to worry about the economics of using more warheads since MIRV's allow you to lift ten warheads for every one missile body.