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Posted - 20 December 2002 10:47

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Metal flywheels fly apart at extremely high speeds.With
the formula: Energy = mass x velocity squared,
increasing the mass isn't near as important as
increasing the velocity because it's function is
With high quality steel failing @ 150ksi, a material
failing @ 600ksi is a valid choice. That material is
filament wound carbon fiber in an advanced aerospace
composite, resin or metal matrix capable of up to
45,000 RPM.
The high tech flywheel is even more high tech by being
housed in a vacuum with magnetic non-friction bearings.
The only contact with the outside world is via
electricity. The motor/generator takes energy in by
speeding up the velocity. Energy is removed by slowing
the velocity. "Decay" is the power requred to maintain
the magnetic bearings on earth. The half life is about
6 months for a 65 pound flywheel. The half life is much
greater in space.
The designed amperage of the motor/generator is a
limiting factor. A low amp system in an auto would
require an intermediate storage devise like a hydraulic
accumulator for high torque passing & saving most of
the braking energy. Braking accumulators would be
various sized with pressure on the brake pedal
determining how small the energy storage unit is valve
I don't believe a home unit would have to be buried
for safety.
I don't know of their commercial availability, but
I do know of ways the composite performance can be
Dean Youngkeit
21 North 100 East
Willard, Utah 84340

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