How many dv do you need to take off from Eva?

[KSP_RAK]

 

How many dv do you need to take off from Eva?

[Nazalassa]

To reach orbit, I'll say about 7k to 8k m/s of DeltaV, although the use of a propeller can make it more like 4k to 5k.

[jimmymcgoochie]

It’s not nearly as simple as one number- Eve’s atmosphere is incredibly thick and most rocket engines can’t function at all or do so very poorly, only the Vector and Dart are realistic options there; using Breaking Ground propellers or atmosphere-breathing engines from mods (Explodium-breathing engines are jets that use oxidiser rather than fuel, Near Future Aeronautics or Kerbal Atomics has some nuclear options) or even KerBalloons’ balloons will drastically reduce the delta-V needed to get to an altitude where normal rockets work much more effectively.

Use surface delta-V for the first stage and vacuum for the rest and you should get a reasonably accurate reading on how you’ll do; remember that Eve has very high gravity and combined with the high pressure it’s surprisingly difficult to get a TWR high enough to fly. You should also avoid accelerating too much in the lower atmosphere or drag will eat your delta-V.

[Rakete]

On 3/9/2023 at 8:10 PM, jimmymcgoochie said:

It’s not nearly as simple as one number- Eve’s atmosphere is incredibly thick and most rocket engines can’t function at all or do so very poorly, only the Vector and Dart are realistic options there; using Breaking Ground propellers or atmosphere-breathing engines from mods (Explodium-breathing engines are jets that use oxidiser rather than fuel, Near Future Aeronautics or Kerbal Atomics has some nuclear options) or even KerBalloons’ balloons will drastically reduce the delta-V needed to get to an altitude where normal rockets work much more effectively.

Use surface delta-V for the first stage and vacuum for the rest and you should get a reasonably accurate reading on how you’ll do; remember that Eve has very high gravity and combined with the high pressure it’s surprisingly difficult to get a TWR high enough to fly. You should also avoid accelerating too much in the lower atmosphere or drag will eat your delta-V.

Couldn't have said it better.

Some nice Engines from the Near- and Far Future mods can ease the pain. Especially the fusion aerospike from FFT. Otherwise an eve ascender for more than one or two kerbals is hard... at least with stock parts.