Otto Lilienthal Quotes
Top 5 wise famous quotes and sayings by Otto Lilienthal
Otto Lilienthal Famous Quotes & Sayings
Discover top inspirational quotes from Otto Lilienthal on Wise Famous Quotes.
All flight is based upon producing air pressure, all flight energy consists in overcoming air pressure.
No one can realize how substantial the air is, until he feels its supporting power beneath him. It inspires confidence at once.