Henry Spencer wrote:

But to do that on the S-II, you
had to add an attitude-control system, and make various other little
additions (e.g., bigger battery packs) to keep it "alive" long enough to
reach a good deorbit opportunity. The S-IVB already had all this stuff,
because of Apollo requirements for it to hold still long enough (with
plenty of margin for trouble) to extract a Lunar Module or whatever, but
the S-II didn't.



Did our S-IVBs used on the Saturn IB for Skylab have the attitude
control RCS packs?
I thought we discussed this once and they deleted them due to no need to
extract a LM from it.

Pat