posted on Apr, 8 2019 @ 12:28 PM
a reply to: beetee
Skylon isn't designed to escape earth velocity. It's intended to reach orbital velocity. Not the same thing.
Escape velocity is intended only if you want to go to elsewhere in the solar system or even leave the solar system. You don't need escape velocity to
go to the Moon, for example. The changes in velocity to /land/ are greater. Or to go into orbit around the moon. Skylon is not intended for those
Due to the low level of air resistance beyond the Kaman line, you can turn off your engines once you have enough speed and you will stay in orbit a
long, long time. There's still air up there, just very, very thin, so anything below medium earth orbit will eventually decay its orbit and fall back
It should also be noted, escape velocity means you are going away from the earth.
Look up the rocket equation. Rocket scientists live and die by it.