"If we worked on the assumption that what is currently regarded as impossible is really impossible, we should never have made any progress."

"We could not but feel that the time was at hand for man to make a practical flight."

"If its engine stops, it must fall with deathly violence, for it can neither glide like the aeroplane or float like the balloon. The helicopter is much easier to design than the aeroplane, but is worth…"

"The fact that the machine did not fall apart at the first gust of wind was a great encouragement."

"The machine is practically ready for its public demonstration."