Renaissance complex machine help. quick

i need a complex machine (2 or more simple machines) that was invented in the renaissance era. it's for a science assignment thats due tomorrow. it can't be a catapult. sorry abut my typing, i'm in a rush. thanks

isn't this meant to be technical support? homework isn't very technical...and from experience, asking a forum for hwk answers never works out too well. I don't understand why you can't just google it either.I managed to find this. But don't think I'll do your hwk for you next time o.O

its non-emulation help, it might as well go here.Davinci invented helicopters.