![]() ![]() This makes piloting much trickier, because you have to worry about going too fast too soon. ![]() You have to care about terminal velocity on ascent.So your ascent stage has to be seriously sleek. It's not like Kerbin, where you're in mostly-vacuum as soon as you're 10 km up, which happens within a minute of launch. You're going to be slogging through thick atmospheric soup a long, long time on the way up. It means that you really have to pay attention to your engines' atmospheric Isp, and pick ones that have a good curve. Eve's surface pressure of 5 atmospheres is really punishing for that. Engines get worse efficiency and lower thrust in atmosphere, compared with vacuum. Very limited engine selection due to atmospheric Isp.And its thick atmosphere means you need to climb straight up for a long time before you can start a gravity turn, which means your engines will be directly fighting that gravity for a much longer time than anywhere else. Eve has by far the strongest gravity anywhere in the solar system, which means you need a much higher TWR than anywhere else. It takes more than twice the dV to get to Eve orbit from the surface as it does from Kerbin. Here are the things you need to contend with at Eve, that you don't have to deal with anywhere else and are therefore likely not used to: It's not just that you have to pack a metric crapload of dV (though you do)- it's also that there are lots of other engineering constraints you have to simultaneously consider, as well. Returning from Eve surface to Eve orbit is an incredible bear, arguably the single hardest challenge you're likely to meet in the Kerbin system. ![]() It's a single burn that's around 1400 m/s if you hit a good launch window. Returning from Eve orbit to Kerbin is not too bad. Do you have to set up a mining station to refuel? Or maybe an orbiting nuke tug? I have a KSP calculator app, the dV to return from Eve is massive. Just what does it take to return from Eve?! ![]()
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