Asymmetric aero forces on one of paoir of mirrored FLT880 Fuel tanks

[Onchyophora]

Trying out if this the right thing to do. ?

I dont know if its related, but i have been flying planes and seem worse at it than i think I am ... (yeah I know right)

(I kept getting unexpected roll behaviors.)(Strong trendency to roll one way...)

and just now i was flying plane with the aero forces on and i saw this. (tiny blue force vector up but only ever on right tank)

(and hey that the way I felt my previous designed plane always wanted to roll. Hmmm)

(also note it really is a visibly bigger effect than that it is just quite transient as you stall the plane and try and grab the image.

http://i.imgur.com/v6ZuQM8.png

Now that is a very hard pitch up, and there is small blue force vector BUT only ever in the right hand fuselage.

Pitch down and i can see them in the left as down force.

I built the pane symmetrically with mirror.

The craft file has the the tanks attached as mirror.

and yeah I >could< perhaps have been flying crooked and not pitched up or down evenly. But nope.

I tried real hard to get the forces vectors from the left tank and no dice.

Admission. I do have (some NON aero mods in the career game.. but no its not them. (Thats karbonite jet engine and KOS computer in the middle)

(and a kerbal engineer chips attached somewhere. Alarm clock, blah blah.)

I will see what i can do about replicating it in a pure stock sandbox sometime.

Not sure whether or how you want the craft file attached.

craft file available on request and instruction.

Edited June 17, 2015 by Onchyophora
fixing stuff.

[Val]

Not sure if this counts as a necro, but I just had that happen, as did ​jlcarneiro.

Craft (stock)

[sal_vager]

Please don't use the aero overlay for any testing of aero forces, it's known to be inaccurate, enable "Display aero data in action menu's" via the debug screen instead.

The line you see is body lift, and KSP is known to misreport lift and thrust on mirrored parts when using the CoT, CoM, CoL and aero forces displays, as it only uses the original part and not its symmetry clones for some things, this is easily seen in the editor when placing Rockomax 24-77 Twitch engines in symmetry, the CoT indicator will point to the side.

And please reproduce this in stock, addons affect KSP even if they aren't in use.

As for Onchyophora, too much canard and not enough rudder.

Edited September 26, 2015 by sal_vager