In sci.space.policy message , Wed, 5 Oct 2011
10:59:39, Jochem Huhmann posted:


I think solids are better for escape systems if you throw them away
unused nearly all the time. Just because they're probably cheaper.
Maybe more reliable, too. For a reusable capsule liquid fueled is
certainly a good idea.

An escape TOWER is a waste of mass; there may be need for a light
fairing to protect the capsule.

The capsule should have a ring of motors at the bottom of its sides,
sized overall to give the necessary but uncomfortable escape thrust for
the escape period.

As soon as there is no need for such an escape system, or when the lower
stages have been dropped, or after a subsequent coast period, then those
motors should be used, a comfortable few at a time, for the final
insertion into orbit or for subsequent orbit raising.

Everything that lifts off the launch pad should be used before it is
abandoned.

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