|
|
|
|
|
by Hokusai
1593 days ago
|
|
That is just a Archimedes' screw. Well known way before DaVinci. It's cool that DaVinci got to the conclusion that if moves water it can move air, thou. There original design used materials from the time, but with an enough powerful engine you can probably make it fly. |
|
Using a helix as a simple machine is an old concept and probably predates writing; that's about as much of a common ancestor as they share.