The History of the Helicopter Pt1, 2

Helicopter over water seen from above; hovering over top of lighthouse w, waves breaking around base. CU slow motion of hummingbirds; engravings, paintings, etchings drawings. DiVinci model, drawings. Chinese toy top propeller; more recent toiys demonstrated. Various other models, drawings. Model from published paper of 1843 design by George Cayley, 4 discs on rowboat w, wheels. Wright brothers military test, starting take off. Moving wing tests in early 1900s. Flapping wings, hopping plane, ro br, br,