Not quite right,
glum. Anytime the ship's in steady-state flight, be it cruise, climb, or descent, net lift must be 200 tons. (Note: net lift is the summation of wing and horizontal tail lift, plus any vertical component of engine thrust).
It is
during the transition to climb or descent that lift changes. I.E. in cruise, ROC = 0. To transition to climb of 1000 ft/min, we must accelerate the aircraft to this vertical velocity. To do that takes a few additional tons of net lift. Once stabilized in climb, net lift is again 200 tons. Opposite is true in descent.
This is much more obvious in a highly maneuverable airplane; the change in net lift is read out on a G-meter.
