How Is Delta V Calculated?

[RazorWolf19]

I would love to learn the formula for calculating Delta V, I can imagine it would be extremely useful for my interplanetary missions.

So, just a thought here, is it something to do with:

-Amount of Fuel

-ISP

-Thrust from Engine

And if those are the values, how do you work with them to get a m/s answer?

Thanks in advance.

[zzz]

http://wiki.kerbalspaceprogram.com/wiki/Tutorial:Advanced_Rocket_Design

[AviatOrme]

Well, the shortest answer is to use the Tsiolkovsky rocket equation.

That will give you the dV of a stage or rocket.

For more details, Wikipedia is your friend!

https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation

[RazorWolf19]

Thanks for quick replies!

[rryy]

The ÃŽâ€v is delta-v, and the m1 and m2 are full mass and dry mass.

[smarky55]

where m0 is start mass(with propellant)

m1 is final mass (after burning propellant)

ve is exhaust velocity which is ISP * 9.81

ln is log base e (e = 2.718)

this is all from https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation

EDIT:Wow triple ninja

Edited May 19, 2013 by smarky55

[Fractal_UK]

You can calculate it with the Tsiolkovsky Rocket Equation.

ÃŽâ€v = v_e ln (m₀ / m₁)

Where v_e is the exhaust velocity (specific impulse*g), m₀ is the initial mass of the rocket and m₁ is the mass of the rocket after all fuel is expended.