The Theory of Aviation. [By Peter Ellis].

Progress, Volume III, Issue 4, 1 February 1908, Page 128

The Theory of Aviation. [By Peter Ellis].

The problem of serial flight lias been aptly termed " The Mastery of the Air." Without the atmosphere such flight would be impossible, for while air offers resistance and motion, it also provides one of the essential things, such as the solid earth offers support to our railways and the sea to ships. Of course to perform aerial flight we must expend force, and force is not force when nothing is overcome. The main resistance to motion in the air is the product of the same eternal force, i.e., gravity, which we overcome in locomotion over the earth and sea. It is quite evidert we must first ascend from the