difficulties, so marked where feathering forward and back, would with this motion entirely disappear, regardless of any wind condition, provided the engine and burden were suspended well below all lifting surfaces. With the wheel motion and sails thus automatically feathered, it would seem as if we… … ever to fly we must engage undisturbed air for our support and not stand still and churn wing motion in air, especially as the atmo- the same air with our wheels, or wings, or sphere is so very thin and light, great speed sails. is absolutely necessary to acquire supporting Now that we have found…
Aeronautics
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
