Precision Landings?

[Omicron314]

So lately I have been wondering exactly how to perform a calculated, predictable descent with a designated landing site and all. But, as you can tell, I have no idea how. I understand that for smaller, atmosphere-less bodies it's not too difficult, you just overshoot a bit and cancel out your velocity over the site. But what about bodies with atmospheres? Is there any way to calculate the drag coefficient in order to determine where I'll have to deorbit that spaceplane or capsule to land at the KSC? Or ae you supposed to just eyeball it. This isn't a particularly pressing issue, but responses are appreciated, as always.

Edited July 24, 2013 by Omicron314

[Kimberly]

There is a chart floating around on the forums that will tell you where to put your periapsis when you're at a particular distance from the target to ensure that you'll end up in the right place. Mechjeb's maneuver nodes will also adjust for drag. I wouldn't advise calculating it yourself every time.

Killing all your velocity works for atmospheric bodies too, though. It takes a lot of delta-V, but it's quite possible to simply cancel out all your horizontal velocity and start falling straight down.

[lammatt]

science is all about trial and error

also.. experience is important too

of cos... knowledge helps too (but that's another topic)

(hvnt u ever doubt why your lab demostrator knows which solvent mix to use for that cromatography when you were still an undergrad? that's called experience; and that comes from endless number of trial and failling)

Edited July 24, 2013 by lammatt

[arq]

I, too, would love if there was an aerobrake/landing calculator separate from MechJeb.

[el_coyoto]

Here you go : http://alterbaron.github.io/ksp_aerocalc/

I can't find the chart anymore, it has a sweet retro/60's feel...

EDIT : here is the chart : http://forum.kerbalspaceprogram.com/showthread.php/37327-Atmospheric-Landing-Chart-Pinpoint-landings-on-Duna-Eve-Kerbin-Laythe!

Happy landings ! XD

Edited July 24, 2013 by el_coyoto

[Omicron314]

Okay. Thanks to you all for replying!