Tony writes:

Some - Mx is an example -- don't quite understand how to do the
analysis, and would rather argue than show where the math I cited is in
error. Too bad, it could have been a learning experience for them.

I've explained the error. You cannot change your rate of climb
without accelerating. You cannot accelerate without deviating from 1
G. You cannot maintain a constant rate of climb forever, so you must
change the rate of climb from time to time. And any maneuver that
changes the rate of climb (which, in practice, is roughly the same as
saying any maneuver that changes altitude) will change the G forces.
It's very simple, and doesn't require any fancy physics.

Do take a look at the neat family of curves in the citation: it's
interesting stuff, and guess what? If the equations of motion are
solved in closed form, G is 1, into the seat.

You can solve all the equations you want, but you cannot escape from
the reality I've described above.

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