How to get delta v stats without another mod

[AlimOncul]

Hey everybody i got an idea Payload Calculator and i need to calculate delta v. Mechjeb does that but can i do it without mechjeb. If not how can i use it with mechjeb

 

Thanks

[sarbian]

10 hours ago, AlimOncul said:

can i do it without mechjeb

Yes, with Kerbal Engineer Redux.

[Tex_NL]

Or good old pen and paper:

http://wiki.kerbalspaceprogram.com/wiki/Cheat_sheet#Delta-v_.28.CE.94v.29
http://wiki.kerbalspaceprogram.com/wiki/Tutorial:Advanced_Rocket_Design

[AlimOncul]

2 hours ago, Tex_NL said:

Or good old pen and paper:

http://wiki.kerbalspaceprogram.com/wiki/Cheat_sheet#Delta-v_.28.CE.94v.29
http://wiki.kerbalspaceprogram.com/wiki/Tutorial:Advanced_Rocket_Design

 i know the formula but when using 2 engines with different isp's and different size of tanks. Its for mod not for me.

Edit:

http://imgur.com/a/z8Pz3

i created an ui 

Edited February 18, 2017 by AlimOncul

[Gaarst]

57 minutes ago, AlimOncul said:

 i know the formula but when using 2 engines with different isp's and different size of tanks. Its for mod not for me.

The tanks don't matter. Actually, the fuels don't even matter the only thing you need to know is the dry and wet masses. (Different fuels do matter if you're using several types in a single stage and if they have different burn times because you don't have the same engines running for the duration of the burn).

For several times the same engine (or several different engines with the same Isp), the calculation is easy: you just have to account for the mass of the extra engines but the Isp doesn't change (and thrust doesn't matter).

For several different engines with different Isp, the easiest way to calculate the dV is to approximate all your engines as a single engine. You then have to average the Isp by thrust as follows:  (Fi is the thrust of your engines and Isp,i is the respective corresponding Isp) and use this total Isp in the rocket equation.

Edited February 18, 2017 by Gaarst

[AlimOncul]

Alright now i dont know how to get dry and wet masses isps from editor