On Fri, 28 May 2004 at 16:25:22 in message
, Peter Duniho
wrote:

He basically said, keep speed constant, and required thrust is reduced.
You're saying, keep required thrust constant, and speed is higher. Those
seem to me to be two ways of saying the same thing.

What I was trying to point out (cautiously) is that talking about huge
reductions of drag at altitude may be misleading. If you fly at best A0A
all the time then the drag is almost independent of altitude. If that is
correct then the work done per mile is also constant and range is also
almost independent of altitude. But that sounds horribly revolutionary.
:-(

Doing that you would always get there faster at altitude.
--
David CL Francis