There is something wrong with KSP parts weight

[gilflo]

I think there is definitely something wrong with the indicated weight of a lot of stuff. But I dont know if it is KER or KSP parts

Here is a Mk2 cockpit (2,06T) , then i add a MK2 rocket fuel fuselage (3,57T) and a Rapier Engine (2T)

Total weight should be 7,63T

In fact it is 7,435T, because if you look the weight of the fuselage (right click) wet weight given is 3,375T and not 3,57T given in SPH Fuel tank part.

Then I add 2 delta wings. Given weight of each is 0,2T as indicated in aerodynamic parts. Total weight should be 7,435+0,4 = 7,835T

In fact it is 8,279 . So each delta wing weight is in fact 0,422 and not 0,2T

If you add mechjeb on the aircraft, it will find the same total weight as KER. They agree.

And you can try a lot of wings, each time the real calculated weight is not the indicated weight.

So there is something wrong somewhere with the weight and in final, my SSTO is given for 67T by KER and 57T by Mechjeb.

Here Mechjeb is right and disagree with KER

But when i launch my SSTO, Mechjeb take the wrong KER weight in account, 10T more! Weight is now 67T

In other way, I can see that mechjeb don't take in account weight of some small parts, when I add them, like vernor engines or adjustable landing gear......

That's why i posted in mechjeb and KER section

Edited June 1, 2015 by gilflo