Computers Quote by Joseph LeConte

One: There is a low limit of weight [of about] 50 pounds beyond which it is impossible for an animal to fly. Two: The…

— Joseph LeConte

Heavier-than-air flying machines are impossible.

— Lord Kelvin

Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible.

— Simon Newcomb

This machine was a failure to the extent that it could not fly. In other respects it was a very important and necessary stepping…

— Igor Sikorsky

It is possible to fly without motors, but not without knowledge and skill.

— Wilbur Wright

These airplanes we have today are no more than a perfection of a toy made of paper children use to play with. My opinion…

— Henri Coanda

“The existence of birds demonstrated that heavier-than-air flight was physically possible and prompted efforts to build flying machines. Yet the first functioning airplanes did…

— Nick Bostrom

The demonstration that no possible combination of known substances, known forms of machinery and known forms of force, can be united in a practical…

— Simon Newcomb

I have always felt it is my destiny to build a machine that would allow man to fly.

— Leonardo da Vinci

I believe things cannot make themselves impossible.

— Stephen Hawking

Do I believe, for example, that by using magic I could fly? No. How would you get around gravity? Impossible. Do I believe that…

— Alan Moore

In my opinion, we should search for a completely different flying machine, based on other flying principles.

— Henri Coanda