Originally posted by 3WE
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a) Take a wing and fly it at an angle where it will make zero lift.
b) Increase the angle (keeping the speed) until you produce lift = weight (i.e. 1G).
c) Double that angle and you doubled the lift and the Gs.
But, for example, a) is -2.5 deg, b) is 2.5 deg (and increase of 5 deg from a) and c) is 7.5 deg (another 5 deg from b, or total 10 deg from a).
But obviously 7.5 is not 2*2.5.
Now, if you measure AoA taking zero as AoA as the point of zero lift, then a) is zero, b) is 5 and c) is 10. Exactly as you expected.
That's what I said, what you say is true if you put your zero AoA reference at the point of zero lift.
And it doesn't matter if the ratio is 1:1 or 1:100.
If it is 1:100, for 1 you have 100, and for 2 you have 200. It still hold that when you double one you doubled the other.
But, you need the straight lie to cross the x and y axes in the origin, otherwise you have a linear function but NOT a proportional function.
Again, it is the difference between y=mx and y=mx+b. An don't tell me that that is an engineers thing not an aggie one. My daughter is studying exactly that now in 7th grade and my other daughter is still studying that in 9th grade. And I bet that you studied that in the Advance Manuring class in the Aggie School.
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