John Halpenny wrote:
wrote:

But the central CBC on the heavy throttles back much later than
than
the CBC on the single. So you get into the regime where you have
both
a high flow rate and not much liquid in the tank. All the heavy
CBCs
run this way, but the single does not (when the tank is low, it's
running at low flow rates).

As the tank empties, there is more and more chance that not enough
oxygen will flow into the line to match what the pump is sucking out.
The problem is worse if the acceleration is smaller. Could it be that
the engine throttles back near the end because they know there will
be
flow problems, and this time they didn't do it soon enough?

One of the descriptions of the Delta-4 stated that the single version
throttles back early to keep the acceleration from exceeding 5Gs.
Perhaps this disguised a problem where you can't keep full power to
fuel depletion even if you want to (and as the Heavy tried to do) ?
Lou Scheffer