Moving EVA Kerbal up/down fires RCS and rotates ship??

[tg626]

I'm still digging to see if it's a mod or what, but while I am I thought I'd send up a flare and see if this is a "known thing"...

Station in orbit of kerbin - RCS on.

EVA Kerbal

Press W OR S

As kerbal moves up/down ladder (hatch really) - Starboard RCS fires and station starts to rotate

While W and S move kerbal in different directions, they both fire the Starboard RCS.

Spacebar to "release" Kerbal

W and S still make station rotate

Hit "R" to enable EVA jetpack

W and S still make station rotate

??!?

[tg626]

Ok... Heres what I know:

This station, which was launched by an Energia launcher, was asymetrical - like this:

So, before launch, I set some positive trim on the rockets so that "at rest" they would be providing vectored thrust (which worked quite well). Once the station was in orbit, I used SAS to "hold attitude", and found this odd behavior.

During testing I switched off SAS, and the RCS system obeyed the trim setting and started rotating the station. Once it did I used ALT-X to "zero" the trim out. And once I did THAT, this weird behavior stopped.

So, it seems that IF you have a trim set, SAS on, and a kerbal on EVA, forward or backward movement of the Kerbal will cause the trim to "kick in" (or the nearby craft's SAS to disengage) and set the craft spinning.

[Bill Phil]

I had an EVA going from the Mun to Kerbin, grabbing science... And it was like Gene Cernan's Gemini EVA.... But I succeeded in the end.

[Claw]

Yes, this is actually a game bug. As posted above, it's recommended that you zero out trim on any craft within physics range by pressing MOD+X. Moving a ship (doesn't have to be a kerbal) causes the SAS on all craft within physics range to disengage. So if a ship has trim input, the trim input will take over.

Cheers,

~Claw

Edited April 7, 2015 by Claw

[tg626]

OK, I had forgotten about that recommendation, thanks for reminding me! :-)