Sun Jun 05, 2022 11:13 pm
I looked up the book and read the passage. All I can think of, is he's referring to the structure of the tail, which changed between the -100 and -200. The horizontal stabilizer sweep was increased and the area was increased as well. It might be that the elevation of the stabilizer relative to the wing, also may have changed. But am not sure about that.
Increasing the stabilizer sweep angle has some benefits. The center of tail lift moves backwards, which gives the stabilizer more leverage. And the range of stall angles increases, which gives the stabilizer more control margin if the main wing stalls. The cost of this is some loss of lift coefficient, which is why an area increase usually accompanies a sweep angle increase, to make up the loss of lift.
This is speculation, though, just trying to piece together an argument that makes sense. It may not be what he meant.