I read somewhere that Leonardo Da Vinci drew plans for a primitive helicopter and thought up other things that weren't put to practical use for centuries after he diedCould someone give me some info on this?
Aluminum is always used in an alloyed state to give it the desired mechanical properties.
A small catalog of his innovative designs include: Flying Machines Parachutes Submarines Underwater Rebreathing Devices Self Floatation/Ocean Rescue Devices Swimming Fins Pumping Mechanisms Water Turbines Dredging Systems Steam Calorimeters Water-well Drill Swing Bridges Canals Leveling/Surveying Instruments Cranes Pulley Systems Street-lighting Systems Convection Roasting Spit Mechanical Saw Treadle-operated Lathe Compasses Contact Lenses Military Weapons
They are all an alloy of aluminum, but that should not affect the clear coat one way or another.
