By Brady, Serena, and Briley
Though the first actual helicopter was not built until the 1940s, it is believed that Leonardo Da Vinci’s sketches from the late fifteenth century were the predecessor to modern day flaying machine.
As with many of Da Vinci’s ideas, he never actually built and tested it- but his notes and drawings mapped out exactly how the device would operate.
Lift-Upward-acting force on an aircraft wing or airfoil. An aircraft in flight experiences an upward lift force, as well as the thrust of the engine, the force of its own weight, and a drag force.
Drag- a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.