Page:Aerial Flight - Volume 2 - Aerodonetics - Frederick Lanchester - 1908.djvu/58

§ 17 during this flight, the alternative explanation of its abnormal duration, is not for the moment under discussion. The examination of the behaviour of an aerodone in flight has in the foregoing demonstration been carried as far as has been found possible without a mathematical analysis; it now becomes necessary to adopt a more rigid line of treatment and to examine quantitatively the curves of flight and the conditions governing their form and permanence.