[Crumpp]

Parametric analyses => at least one fixed key parameter => constant power problem can't be solved.

We are not looking for specific aircraft performance at a constant power. We are looking for the significance of weight affects on the aircraft. We want to view the relationship of weight to the performance of the aircraft.

The math tells us that although:

There is change in the aircraft's ability to compensate for that affect but the affect of weight is exactly the same.

In addition, the math also tell us that:

We can only conclude that weight has very significant affects upon an aircraft, even at high speeds.

Your inability to see past your simple specific performance calculations and understand the principles behind them is where it is easy to tell you have only an internet education, Pihl.

You do quite a bit of parametric study in aerodynamics. It is one way we learn about the relationships of forces in complex systems.

When we do a parametric study, we are not looking for specific aircraft performance but rather we are looking at the relationships of the forces involved.

This is why I said you, "cannot see the forest for the trees".

You very nicely proved that through your own calculations.

All the best,

Crumpp