A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2013; you can also visit the original URL.
The file type is
Routine travel to and from Mars demands an efficient, rapid, low cost means of two-way transportation. To answer this need, we have invented a system of two rotating tethers in highly elliptical orbits about each planet. At Earth, a payload is picked up near periapsis and tossed ahalf-rotation later, still near periapsis, at a velocity sufficient to send the payload on a high-speed trajectory to Mars. At Mars, it is caught near periapsis and is released a short time later on a suborbitaldoi:10.2514/2.5798 fatcat:5vlpv73omvbknfmetsek5bfcei