Math shortcut.

[Vanamonde]

The battery in my calculator died and I can't do ln and ln^-1, so before I fly my attempt at an Eve manned return all the way there, somebody please check my thinking. If my ship can go pad to 80km around Kerbin and attain a speed of 9.5km/s while doing so, will it make Eve orbit? That is to say, does ~4700dV for Kerbin orbit (2200m/s) plus 7.3km/s = 11,500dV (with a bit of safety margin)?

(I'm coming down with a cold and I'm a little feverish, so please don't laugh if this makes no sense.)

[Specialist290]

I'd say it sounds about right, myself.

[Yargnit]

Depending on what method you use to reach Eve, from Kerbin Orbit you can get there for anything from less than 1500 d/v, to around 3k or so (+ whatever you need to circularize your orbit, which can be a ton, or just a couple hundred depending on Aerobraking).

This site is awesome for calculating that stuff if you want to have the math done for you: http://ksp.olex.biz/

[Vanamonde]

Sorry if I wasn't clear. I'm trying to perform testing at Kerbin that will determine if the lander can take off from Eve. I can already get there, so now I'm trying to figure out if I can get back.

[Yargnit]

Ah. Taking off from the surface of Eve you'll want a craft that has at least 9k d/v (from a 6km+ tall mountain) to 12k d/v (from sea level). Also you'll want a TWR of roughly 3.0 on Kerbin because of Eve's heavier gravity. A decent test I've heard on the past is to test if your rocker can SSTO on Kerbin (that is if you can carry all your emptied stages to orbit after draining them) then you've got a decent shot at at least a mountain top orbit from Eve. With Eve though it's hard to say for sure w/o seeing a good picture of the craft (design/staging/ d/v readouts etc) because it's so finicky.

[JiWint]

click "fn" and numpad "enter" or just go to start and type in "calculator" ^^

[TechnicalK3rbal]

Don't you have a calculator on whatever you posted this from or on your computer running kerbal space program?

[lammatt]

do you know there is a calc.exe in your windows?

[Oddible]

http://wiki.kerbalspaceprogram.com/wiki/Cheat_Sheet

[Lord_Demon]

You know that most computers, like the one you use to type posts on forums, have some sort of calculator program, right?

[K^2]

Google. If you enter an equation into a search bar, it will compute it for you. It also does unit conversions with mixed units. If you can ask a question on the forum, you can make the necessary computations.