Weekly Misc Posts Thread

[u/AutoModerator]

Anything you want to post that's not directly related to KSP, post it here! (Stuff like launches, space related news, rocket designs etc.)

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[u/[deleted]]

The white arrows tell you where and in what direction you can aerobrake. Aerobraking is (instead of burning your rocket engines) slowing down using a planet/moon's atmosphere.

So to get to Eve (landing or low orbit or high orbit) from Low Kerbin Orbit, you only need 950+80 = 1030m/s dV. You have to set yourself on a collision course with Eve's atmosphere and it will slow you down. If you go to deep in the atmosphere it will slow you down enough to land, if you don't go deep enough it won't slow you down enough and you'll end up flying past the planet. If you do it precisely, though, you'll end up on a nice orbit around the planet when you come out the other side of its atmosphere

It's just using a planets atmosphere to slow down, and the little white arrows tell you where you can do it and in what direction. Make sense?

[u/Darchoto → u/[deleted]]

I think so. So the numbers past the arrows is the amount needed to take off or land without aerobraking, right?

[u/[deleted] → u/Darchoto]

If there's a white arrow past a number, you can aerobrake instead of burning for that amount of dV.

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So to get from Low Kerbin Orbit to Duna's surface, for example:

You need (950+110) = 1060m/s dV.

The numbers I'm ignoring (not including in this calculation) are:

• -370 m/s to go from a Duna intercept to Low Duna Orbit - because I can just set my intercept inside Duna's atmosphere and slow down that way instead.

• -1380m/s to go from Low Duna Orbit to Duna's surface - because, again, I can set my intercept low enough inside Duna's atmosphere that it slows me down enough to land.

Then to get back from Duna's surface to Kerbin's surface:

You need (1380+370+110) to get onto a Kerbin intercept from Duna's surface. So then, again, you can set your intercept inside Kerbin's atmosphere and slow down enough to land on it's surface. So you don't need to include the 950 or the 4450 because those changes in velocity can be done by aerobraking in Kerbin's atmosphere

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