SpinLaunch

"SpinLaunch is raising $30 million to use large centrifuges to power catapult to
launch payloads into space. They use large centrifuges to store energy and will
then rapidly transfer that momentum into a catapult to send a payload to space at
up to 4,800 kilometers per hour (3,000 mph). If successful, the acceleration
architecture is projected to be both lower cost and use much less power, with the
price of a single space launch reduced to under US$500,000."

See:

https://www.nextbigfuture.com/2018/0...er-launch.html


Feasible?