some more...

Heliocopter - This is a detail of the mechanism that drives the heliocopter. Two men would run on the lower level, which would rotate. The rotation would force the upper "fans" to rotate as well, lifting the heliocopter off the ground.And one more interesting fact:Leonardo wrote in Italian using a special kind of shorthand that he invented himself. People who study his notebooks have long been puzzled by something else, however. He usually used "mirror writing", starting at the right side of the page and moving to the left. Only when he was writing something intended for other people did he write in the normal direction.You can find more information about some other machinery and also see what your name looks like in the "leonardo style"at this site: http://www.mos.org/leonardo .