Wave motion machine Máquina de movimiento ondulatorio

Trammel of Archimedes

Puzzle for everyone with the answer

The secret of the train's wheel

Aristotle wheel paradox, paradoxo da roda de aristóteles

How to build a Perpetual Motion Machine

Self-running pendulum

Marble Machine

Self-running ball lifter

How to make wooden wheels

Impossible bolt - through wood trick

Gearless Transmission, Hobson joint

Amish made marble machine

Overbalanced Buzz saw wheel

How to make Buzz saw wheel motorised