[Crumpp]

I don't understand why you guys keep saying weight = thrust.

Use the climb triangle:

The balance of forces in a steady climb show thrust is acting upwards and an element of weight is adding to the drag

As the thrust assists the lift, the lift required is less than in level flight. Verify mathematically by the formula Lift = W.cos gamma

For a steady speed to be maintained the thrust and the two retarding effects of aerodynamic drag and the weight element must be equal.

If Thrust = T, Drag = D and Weight = W, then as a formula it can be written as:

T = D + W sin gamma

When you dive that element of thrust is acting downward and an element of weight is added to thrust.

Our formula is rearranged to become T + W sin gamma = D

Our lift required increases in a dive as thrust acts against lift.

And this still applies at the equilibrium point:

For a steady speed to be maintained the thrust and the two retarding effects of aerodynamic drag and the weight element must be equal.

http://www.theairlinepilots.com/foru...9895f5d7f6bd2f