shadowfax Posted October 4, 2011 Share Posted October 4, 2011 If we were only talking about this game, then why were we debating Apollo reentry procedures? Link to comment Share on other sites More sharing options...
Hypocee Posted October 4, 2011 Share Posted October 4, 2011 Because, as mentioned, sooner or later heat and G-forces will be implemented. Link to comment Share on other sites More sharing options...
icefire Posted October 10, 2011 Share Posted October 10, 2011 Gravity wells are symmetricTrue for Kerbin at least, not so much for any real body.Except in reality where all spacecraft at low Earth orbit encounter a continuous small drag force from the thin atmosphere that doesn\'t have any clear border, just asymptotically approaches perfect vacuum.All spacecraft in reality experience constant reduction in their peri- and apoapsis altitude.And from solar pressure, and from non spherical gravity sources (see above), and the moon.Their planes are also bumped around by earths lumpy gravity. This can be taken advantage of for special orbits such as a sun synchronous orbit.There are no (unpowered) spiral orbits. If you\'re slower than escape, you\'re elliptical.http://en.wikipedia.org/wiki/Lagrangian_pointhttp://en.wikipedia.org/wiki/Horseshoe_orbithttp://en.wikipedia.org/wiki/Low_energy_transfershttp://en.wikipedia.org/wiki/Aerobraking Link to comment Share on other sites More sharing options...
Entroper Posted October 10, 2011 Share Posted October 10, 2011 http://en.wikipedia.org/wiki/Lagrangian_pointhttp://en.wikipedia.org/wiki/Horseshoe_orbithttp://en.wikipedia.org/wiki/Low_energy_transfershttp://en.wikipedia.org/wiki/AerobrakingThe first two are not spiral orbits, and the last two are powered. Come on, I obviously meant that in order to have a spiral orbit, a force other than the gravity of the body you\'re orbiting needs to be acting on the ship. Link to comment Share on other sites More sharing options...
icefire Posted October 10, 2011 Share Posted October 10, 2011 Then you said it wrongCome on, I obviously meant that in order to have a spiral orbit, a force other than the gravity of the body you\'re orbiting needs to be acting on the ship.Then you should have made your statements more clear.Clever use Lagrangian points allow you to escape a gravity well (or damn close to it) without reaching escape velocity.Horseshoe orbits have dramatic altitude changes with no other forces than gravity at work.Aerobraking is not powered. Link to comment Share on other sites More sharing options...
Entroper Posted October 10, 2011 Share Posted October 10, 2011 Aerobraking is not powered.Sure it is, it\'s powered by the atmosphere. Link to comment Share on other sites More sharing options...
Hypocee Posted October 10, 2011 Share Posted October 10, 2011 True for Kerbin at least, not so much for any real body.Sigh. Symmetric as in time-reversible. They obey conservation of energy. No points. Link to comment Share on other sites More sharing options...
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