Is there a Formula to calculate my TWR on other bodies?

[astropapi1]

So yeah, I'm designing a Duna ascent vehicle, and I have no idea how powerful it needs to be.

So, for example: If my Ship's TWR is 1.0 in Kerbin, what's going to be it's TWR on Duna?

The formula I'm asking would be something like this:

[ Kerbin TWR times X ] for Duna.

[ Kerbin TWR divided X ] for Gilly.

[HoY]

Doesn't engineer have that option built in?

[dubiousmaths]

The formula for TWR would be the same except with a different weight, so it would be thrust/Kerbin weight*surface gravity. Or, if you just know the TWR on Kerbin, multiply it by the ratio of the gravities. Or you could use Engineer or Mechjeb, which have options for different planets

[ThatBum]

I'd imagine it would be something like Kerbin TWR times the inverse of the gravity of the planet.

If it has 1.7 TWR on Kerbin, which has 1g of gravity, and you send it to the Mun, which has 0.16g, you would do 1.7*(1/0.16), which is 10.625. Is that correct?

Edited May 5, 2013 by ThatBum

[Westo454]

Your best bet is to launch a probe with a gravity measures, or you could look it up on the wiki.

But, the formula is (thrust/(mass x gravity))

Eve's gravity is 16.7 m/s

Gilly's gravity is .049 m/s

Etc (wiki values)