On 29/12/2011 5:45 AM, bob haller wrote:

every ounce saved is greater payload capacity and less cost per pound
to orbit....


The first bit is true, but the second not so much. If we assume the goal
is lowest cost per pound to orbit, then this may be achieved by using a
bigger vehicle with a lower payload fraction. Trimming ounces is not
always the best solution.

Sylvia.