Just catching up. Sorry if the quoting is wrong.

Ian Stirling wrote in
:

If you have a string of bombs spaced a second apart on a trajectory,
is there a reason that you can't simply ride the stream with an
orion, and constantly accellerate to 0.1C at ~1G?


The thrust generated by light pressure from the bombs is ignorably small.

Depending where the reaction mass comes from:

- ablation from the Orion's shield, in which case there is no solution for
the mass of the Orion.

- the bomb itself, in which case the final thrust would be minimal (the last
bomb would be moving away from the Orion at 0.1c when detonated)


Of course you could accelerate the bomb to 0.1c, perhaps by carrying it in
the Orion...

--
Peter Fairbrother