Sorry, CJ, but when pitched nose up with the lift vector aft, you can't maintain a constant speed (without an engine) since the horizontal component of your lift vector is directed aft hence the glider slows down. That is accelerated flight, though a negative acceleration (rate of change of velocity with respect to time = acceleration). Keep this up and you will stall.

The 'forward point force' in your example is rearward and amounts to drag rather than thrust. The weight vector is always towards the center of the earth.

"CJ" wrote in message ...
Waveguru wrote:
A rock has air and gravity when you drop it, but does not move forward
through the air. Our wings provide our thrust to move us horizontally.

Boggs

A rock doesn't fall in equilibrium (until terminal velocity at least) and
it's forces operate in only one plane - the vertical. Can we compare apples
with apples please?

If you have sound reasoning to offer and preferably, a vector diagram, I'm
all ears.

CJ
B3