Davinci Clock Plastic Model KitLeonardo Da Vinci developed a number of designs that were well before their time. His vision of vertical flight with his spiral helicopter, paddle wheel powered vessels, and the early armored car may have been laughable in his day, but were the stepping stones for today's MV 22 Osprey, turbine powered Ticonderoga class cruisers, and M1 Abrams tank (and their analogs from other nations of course).