AM <> wrote:

If all the fission energy in 20 lb. of Pu239 were released it would be over
> 175000 tons of TNT.

I do not think it is possible to release all of the energy from the fission
explosion fuel.

> If the bomb only yields 20 tons it is incredibly inefficient. I would
> expect
> more like 20000 tons.

I think that was deliberate. They did not want a big explosion because the
rocket only flew a few miles. Modern fusion bombs have variable yield
("dial-a-yield") meaning they waste fuel at the lower yields.

- Jed

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