On Flir Ex Series Cameras
Leonardo da Vinci Edu-Science - Aerial Screw Assemble Set
The Aerial Screw designed by Leonardo da Vinci was an early precursor to the principle of the modern day helicopter. The device, designed to compress air in order to obtain flight, measured more than 15 feet in diameter and was made from reed, linen and wire.
The machine called for a four-man team to stand on a base and employ a pumping action to spin the rotary blade in order to lift the device off the ground. In Da Vinci's time, the technology needed to create a modern day flying aircraft had not yet been invented, but his concept of rotary wing aviation had unquestionably been conceived.
** This item is BRAND NEW – not refurbished.