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David Macaulay's book "Mill" can inspire you to build a LEGO Technic MOC
model or a classroom project that incorporates both architectural and
mechanical features.
An old LEGO educational Dacta model can make this project interesting. For
a challenge, you should try to modify the amusement ride at
http://www.brickshelf.com/scans/1000/1031/1031-14a.html
to function as a "fly ball governor". Such a device disengages the drive or
engages another drive when the speed exceeds a threshold or "dangerous"
level. David Macaulay's book "Mill" illustrates it (page 78) in the context
of a water-wheel power train that drove several machines in a typical mill
during the 18th century. He illustrates a version that engages and
disengages another drive that controls the power source. He explains that
it would ". . . regulate the flow of water to the [water] wheels by
automatically raising or lowering the [upstream water inflow] gate,
depending on the machinery's demand for power. Without the governor, the
water wheels, power train, and all the equipment would speed up if several
pieces of equipment were suddenly shut down. . . ."
Enjoy, Miles Gentry
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