“The maintenance of equilibrium in forward flight is a matter of practice, and can only be learned by repeated personal experiment.”Otto Lilienthal The Romance of Aeronautics (1912)
“By practice and experience a man can (if the wind be of the right strength) imitate the complete sailing flight of birds by availing himself of the slight upward trend of some winds, by performing circling sweeps, and by allowing the air to carry him.”Otto Lilienthal The Romance of Aeronautics (1912)
“Actual practice in individual flight presents the best prospects for developing our capacity until it leads to perfected free flight.”Otto Lilienthal The Romance of Aeronautics (1912)
“The contrivances which are necessary to counteract the wind effects can only be understood by actual practice in the wind.”Otto Lilienthal The Romance of Aeronautics (1912)