Latest news from the 2014 Geneva Motor Show  Slingatron to hurl
payloads into orbit   July 28, 2013  Artist's concept for a
slingatron space launcher to hurl payloads into space  Artist's
concept for a slingatron space launcher to hurl payloads into
space  Image Gallery (11 images)    Comparison of a sling and
slingatron    The principle is the same as that of sloshing wine
in a glass     Inside the Mark II slingatron     The five-meter
slingatron    The video below outlines how the slingatron works.
Source: Kickstarter  About the Author  we need a good , long
tube on the side of a big mountain , and accelerate the
projectile in vacuum - this would mean far lower Gs , longer
acceleration , bigger projectile , cheaper reach to orbit .  let
me see , starting from 0 height , up to 10kms , we may choose a
45 degree angle . the resulting distance would be a bit over
14kms .  adding an angle at the bottom , curving the trajectory
will give us a cannon with a 20-30km long tube . this way the
accereation could stay