@ italia458,
You're going to have to actually listen to what I say. What is the equation for THP? You'll find that TAS is in that equation.
I'm listening - but it only seems to be one way at the moment.
Please explain why you believe THP = SHP * p.e. (from NAVAVSCOLSCOM-SG-111 page 4) is NOT correct.
You repeatedly insist the formula for Engine + Prop + Airframe with regards to Aircraft performance as being the
only correct version.
So, standing on the earth we consider that to be an inertial reference frame.
As I've said before, being on the earth puts you in an accelerating reference frame (non-inertial reference frame).
Where do you actually stand on this?
edit
So how does the aircraft turn if the forces are actually balanced, like shown in the second picture?
By a combination of elevator and rudder.
The "centrifugal force" (A) is what you feel (like the force of gravity).
The centripetal acceleration is the reason for (A).