Check out this as a means to launch matter into space
at $75 per launch!!!;
http://www.wired.com/news/news/technology/story/22188.html
NASA researchers have accelerated model spacecraft
along a magnetically charged track from zero to 60 mph
in less than half a second.
....the new liftoff technology could
electromagnetically drive space vehicles along a track
at speeds up to 600 mph, then shift to rocket engines
for launch into orbit.
Magnetic levitation of the carrier and vehicles on the
track require about 200 kilovolt amps of electricity
--roughly equivalent to the energy in 2,000 100-watt
light bulbs. The concept has been validated in
experiments on a 20-foot electromagnetic track at the
University of Sussex in Brighton, England.
"Electricity is both inexpensive and environmentally
safe," Buschmann said. "Each launch using a full-scale
maglev track would consume only about US$75 worth of
electricity in today's market."
The new, experimental track at Marshall is an advanced
linear induction motor.
Common in fans, power drills, and sewing machines,
induction motors produce thrust in a straight line
instead of spinning in a circular motion to turn a
shaft of gears.
When the coils of the linear induction motor are
energized by alternating current, a magnetic field is
created, providing thrust that pushes an aluminum
carrier along the maglev track. A horseshoe-shaped
carrier containing a 5-foot, 30-pound spacecraft model
is levitated about one half inch above the track as it
accelerates at six times the force of gravity.
The track is 50 feet long, about 2 feet wide, and
about 1.5 feet high, and is mounted on concrete
pedestals. It consists of 10 identical, 5-foot-long
segments that weigh about 500 pounds each. Most of the
weight is the iron used in the motor.
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