Quote:
Originally Posted by Crumpp
You are confusing the forumla's used to construct our power and thrust curves as well as the contribution of induced drag and drag other than from lift. These do not couple the affects of weight changes.
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No, I use very basic polar calculation to determine the speed change when the weight changes.
The difference between mine and your approach is that I calculate the changed induced drag due to weight change (which means that Cl/AoA change is accounted) while the formula you use, assumes constant Cl/AoA which is a wrong approach for this particular case.