ORIGINAL: ytell
If the plane pulls to the belly on vertical line, so they say, increase your wing incidence.
How can this be true if the elevator trim position is not changed? as fa as I understand, the elevator will keep the wing in the same AOA regardless of wing incidence change (assuming constant speed is maintained)
The wing is what flies, and the prop helps it; the rest of the airplane just follows.
Hence, increase your wing incidence = decrease the incidence of the rest of the airplane = same wing AOA
If the plane pulls to the belly on vertical line => decrease the incidence of the rest of the airplane = stab pushes "down" more and increases a nose pitch "up" that works against the "pull to the belly" tendency