The following video gives some idea of the elevator/pitch stability and control. This film was taken in Italy on April 24, 1909. It is the first time a motion picture was ever shot from a plane in flight. The footage shows what it was like to fly on one of the early Wright craft, with Wilbur at the helm.
https://ia600700.us.archive.org/29/i...Italy_1909.mp4
The plane that flew in Italy on April 24, 1909 was similar (according to the Wright brothers, there is no independent confirmation) to the last version of Flyer III which allegedly flew in 1905 (see the picture). There is a significant difference between this 1905 model and the 1903 plane. The stability in pitch increased significantly. The 1909 (1905) airplane had also dihedral stability (auto roll control) while the 1903 machine did not have. We talk about two sensible different airplanes having two totally different engines. Just because the 1909 model was flyable it does not automatically mean the 1903 plane could take off and fly stably.
