The US army has some small funding for a Slingatron.
The idea is a giant spiral Hula Hoop, somewhat bigger than a football stadium and oscillating at about nine revolutions a second.
I notice that the longer path for the object to travel would allow for less extreme acceleration. (ie fewer G’s)
The program plans are nothing if not ambitious, aiming to:
– Fabricate experimental launchers.
– Demonstrate mass launchers that range in capabilities over three to four orders of magnitude.
– Demonstrate mass velocities on the order of several km/s and perhaps higher than 10km/s.
The Air force and Launchpoint are working on magnetic sled launch systems.
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