90m/s enough for Eve encounter in KSP? (reading delta-v maps)

I'm trying to understand this cool delta-v map, in particular I don't get how 90m/s delta-v should be enough to go from a transfer orbit to an Eve encounter:

In my attempt, I go to a transfer orbit by burning straight up against Kerbin's orbit until I get an escape:

This escape burn already gives us about half the required orbital transfer to Eve:

But it's not even close to the 90m/s that is allegedly sufficient for an encounter. For that, I need about 400m/s:

So what's going on?

kerbal-space-program

Best Answer

As stated previously by Gedas:

If you try to do the burn while in solar orbit, it's much less efficient (because of Oberth effect).

Other than this you also need to take transfer windows into account. This means that the minimum delta-V required changes with time. Calculating it is not easy, but in the case of Eve and Duna it shouldn't be that hard, you can find many guides (such as this one):

However in the case of planets with high inclinations (they don't orbit in the some plane) and highly elliptical orbits - mainly Moho and Eeloo - this method becomes less accurate.

If you have the time and patience to maximize the efficiency of your transfer, I would like to recommend mods, such as the Transfer Window Planner.

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How much delta-v does it take to get to Eve in KSP?

It requires about 7000 m/s of vacuum delta-v to get into orbit from sea level. Eve is 700 km in diameter, making it 100 km larger than Kerbin, and the largest terrestrial planet in the Kerbal solar system.

How much delta-v Do I need KSP?

Assumption: It takes roughly 2500 m/s of \u0394v to escape Kerbin's atmosphere before vacuum \u0394v values take over for the stage powering the transition (actual value ranges between 2000 m/s and 3400 m/s depending on ascent). Note that, as of KSP 1.3. 1, around 3800 m/s of \u0394v is required to reach an 80km orbit from the KSC.

How much delta-v Do you need to orbit kerbin?

Reaching a stable orbit around Kerbin is one of the first milestones the player achieves in the game. Achieving such an orbit with a fuel-optimal ascent requires a delta-V of roughly 4500 m/s, the second largest of all celestial bodies with a solid surface after Eve.

How much delta-v does it take to get from Duna to kerbin?

With proper aerobraking, a round trip from Kerbin to Duna's orbit and back requires roughly 1700 m/s of delta-v, less than a round trip to any other planet....Interplanetary Travel.BodyDelta-VKerbin~620 m/sDres~820 m/sEve~1080 m/sJool~1350 m/s3 more rows

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