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FOBS by definition requires an orbital insertion burn and a deorbiting burn, for the same amount of fuel you can have faster ballistic trajectories. A depressed trajectory is not FOBS and you can't have true FOBS at anything less than 100km altitude. The only reason to have FOBS is if you are taking the long route over say the South Pole, otherwise you are wasting payload capability.


The specific system we are discussing is FOBS + HGV, so yes for this discussion it must be FOBS + HGV. And for that you need something SS-18 SIZED (not necessarily an SS-18). Maybe you could squeeze it into say something as small as a SS-19/SS-24, but its not going on a SS-27/Minuteman sized booster.


This "civilian LEO" is exactly what I was talking about. It is hard to hide (if HGV), and once found can be easily shot down. And no one is going to complain if it is. That is a very risky move that can be easily done in other ways (container nukes).


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