In late 1958 to early 1959, it was realized that the smallest practica... - dofaq.co
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In late 1958 to early 1959, it was realized that the smallest practica...

wikipedia - 14 Feb 2023
In late 1958 to early 1959, it was realized that the smallest practical vehicle would be determined by the smallest achievable bomb yield. The use of 0.03 kt (sea-level yield) bombs would give vehicle mass of 880 tons. However, this was regarded as too small for anything other than an orbital test vehicle and the team soon focused on a 4,000 ton "base design".

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