Perpetual motion simulations...

[iacob alex]

.....at : https://play.google.com/store/apps/details?id=com.me.obwheel
           http://youtu.be/aUZikT1ynk4
            Simulation is an act of prolonged imagination , sometimes developing a creative power...
              Al_ex

[iacob alex]

.....at : https://grabcad.com/library/perpetual-motion-machine-2
Simulation is a kind of perseverence...if you insist on yourself...there is no failure ,  except in no longer trying an " Exit".
     Al _ex