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Leonardo DaVinci's Cam Hammer
This cam-operated automatic hammer is a perfect addition to anyone's collection of Leonardo DaVinci's works!
$39.95 more info
Leonardo DaVinci's Self-Supporting Arch Bridge
No glue! The unique structure of this bridge holds itself together without any fasteners or connectors. All parts are precision cut from high-quality hardwood. The finished model is 36” wide, 10” tall and 5-1/2” wide.
$29.95 more info
DaVinci's Ball Bearing Machine
DaVinci's ball-bearing mechanism and cage-gear are both represented in this model of a turntable display stand.
$39.95 more info
Perpetual Motion Machine
The classic overbalanced wheel, a so-called "perpetual motion machine", as designed by French Architect Villiard De Honnecourt in about 1235, and studied extensively by Leonardo Da Vinci in the late 1400's.
$169.00 more info
Medieval Battering Ram
The Medieval Battering Ram was an awesome force in ancient times. With it, a small group of men could easily bust through the portcullis and gates of virtually any castle.
$39.95 more info
The Lever Paradox
When discussing levers, Archimedes said: "Equal
weights at unequal distances are
not at
equilibrium." unfortunately, Archimedes never saw
our Lever Paradox, where equal weights at unequal
distances
do balance!
$49.95 more info
The Chinese South Pointing Chariot
It was invented in China, about 2600 years ago, and is one of the most precise machines in ancient history. It is a non-magnetic compass, and the oldest example of differential gearing in the world.
$79.00 more info
The Chinese South Pointing Chariot
- Easy Assembly Version
This Easy Assembly Version of our popular Chinese
South Pointing Chariot comes with many of the same
features but has been re-engineered to reduce
assembly time and increase accuracy of the
mechanisms.
$59.95 more info