On 2001-11-04 16:33, The Rat wrote:
On 2001-11-04 15:01, Donnie B. wrote:
I agree that you could launch the spacecraft on a trajectory that puts it above the ecliptic with no penalty. But somewhere along the way, you have to push it back down, or else it's gonna fly way, way "north" or "south" of Jupiter. Or any other planet, except maybe Pluto.
You have to cancel out the vector that pushed you above the plane originally, and then provide even more push to get back down to the ecliptic by the time you get to Jupe. Of course, you have a long coast to do it in, so maybe you can afford that much fuel.
No, you don't launch it on a trajectory that puts it above the ecliptic, well not by much anyway. You launch it toward the Sun so that it goes over the top or under the bottom, swings around in a veeeeeery long ellipse, intercepts Jupiter, and gets flattened out. In other words you arrange things so that the elliptical orbit around the Sun has Jupiter at or near its other focus.
Maybe we can get Phil to make a diagram if I'm right, that would show what I mean a lot easier.
C'mon Phil, please please pleeeeease, can I get a gold star?!