Hello guys!
Finally, here it is, the official delta-V map for SFS 1.5:
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This map can be used to know the delta-V requirements for a particular mission. A delta-V calculator can be used then to design an optimal ship to complete the mission.
If you were used to the delta-V map under SFS 1.4, you'll notice that the transfers are slightly more demanding now. This is because the solar system scale has been raised by a factor 2.5, and the Sun is nearly 3 times more massive than before. The only exception to this is Venus because its orbit has been raised a little more, and it's now relatively closer to Earth than it was before.
Here are a few tips about how to use this map:
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Those tutorials were made with the previous delta-V map, which explains that some numbers are slightly different.
Detailed explanation of the delta-V concept:
If you've never heard about delta-V, you've probably been confused by this term. "Delta-V" litterally means velocity difference. It is an abstract resource for rockets, that tells you "by how much it can make vary its velocity". For example, if your ship is moving at 1650 m/s, and then you accelerate until it reaches 1750 m/s, you've spent 100 m/s of delta-V. And some fuel aswell.
Because a rocket has a limited quantity of fuel, its delta-V is limited too. The delta-V of a rocket mainly depends on its fuel reserve. There are other factors, but I won't elaborate here.
Some calculators allow you to know precisely how much delta-V a rocket has at its disposal, this map tells you how much you need for a given mission. The combination of both allows experienced players to accurately design a ship for a particular mission.