Massless parts

[nhnifong]

So I'd like to know more about weightless parts. Apparently some parts have zero mass in flight, despite having a reported mass value in the VAB. (mechjeb will agree, in the VAB, but not in flight)

Is there a list of all the parts which have have no mass in flight?. Right now I know the strut and the landing gear. Are these bugs or intentional?

Edited June 26, 2013 by nhnifong

[joppiesaus]

The fuel lines have no mass in flight. That's all I know.

[Redjoker]

Struts are also not counted as mass in flight. I believe its to reduce to load on computers when you have 200 struts to hold your rocket together.

[UmbralRaptor]

Fuel lines struts, unpowered landing gear. (I think it's semi-intentional for the first two.)

RCS was massless, but that changed with 0.18. I think Nosecones were also.

edit: and apparently that includes some of the structural parts labled "struts," not just the EAS-4. Hrm...

Edited June 26, 2013 by UmbralRaptor

[Hooligan Labs]

I believe what you are looking for is PhysicalSignificance. If NONE, then it doesn't have mass, drag, etc. Check the .cfg file for the nose cones and such.

http://wiki.kerbalspaceprogram.com/wiki/API:Part

[numerobis]

Physical significance is where it's at, but the wheels are physically significant in the VAB and not in flight. I don't think that's in the part.cfg

I don't know of any other such cases.

[nhnifong]

Thanks Hooligan

[Spaceisbeautifulul]

Oh wow, it had a in the text, so it came out a face.

That just made my day.

[bsalis]

unpowered landing gear.

Not sure about unpowered, but I have heard people mention that the landing gear has mass extended but not retracted. So I checked and... no mass. Does not matter if extended or not.

[numerobis]

I believe they meant unpowered as opposed to the powered wheels that draw electricity and have mass.

[tavert]

Cubic struts and octo-struts are also massless.

[Guest]

Cubic struts and octo-struts are also massless.

This might explain why they cause such strange anomalies when they're jolted.

[foamyesque]

Cubic struts and octo-struts are also massless.

Well now, that's interesting.

[SpaceSphereOfDeath]

Cubic struts and octo-struts are also massless.

It's because they have the setting physics significant to 0, this also applys to mobiltiy enhancers and kerbals when a force is applyed at right angles to the front of the kerbal

(not including the EVA pack)