Lets speculate a little bit for argument sake. Take this with a grain of salt because I am not a specialist, just a information hoarder.
Lets put miniaturization aside and focus on another aspects, which i judge will be more critical.
The warhead must survive mechanical stress of launch and reentry, and thermal stress at reentry. The question is: can it be designed only with computers and public knowledge? They could build small hypersonic wind tunnel to collect data and simulate the rest.
Lets put miniaturization aside and focus on another aspects, which i judge will be more critical.
The warhead must survive mechanical stress of launch and reentry, and thermal stress at reentry. The question is: can it be designed only with computers and public knowledge? They could build small hypersonic wind tunnel to collect data and simulate the rest.