Aerodynamic bug

[Antoinebernadet]

First of all i don't know if i am in the right categorie for a topic about bug reporting, so thank you to notify me if i am not.

I made a car, and there is a kind of very important drag create by the wheels on the right side of it and none in the left side (as you can see in red on the screenshots). Because of it, my car is turning (which is normal if we consider those aerodynamical pertubation) but i've already check thousand of times and rebuild the car, always using the symetrical thing but the problem still here even with no difference betwenn my left and right side. 

If it's a bug, i'm happy to contribute to the good devellopement of the game, if it's my fault thank you for telling me what's wrong

for informations i'm running KSP 1.2.1.1604 on a laptop with Intel core i5 processor and a nvidia GEFORCE 710m

http://imgur.com/a/NP5yy (screenshots)

https://www.dropbox.com/s/7s5c5vbwadjvr4k/Report bug.sfs?dl=0 (my save)

https://www.dropbox.com/s/ctyxi70lcyou85h/Roulade.craft?dl=0 (the vessel)

[sal_vager]

Hi Antoinebernadet, I have move this to technical support, though I can say it is not aerodynamic drag causing this.

The aero overlay is not reliable, and does not always show all the lines or lines of the right size, instead please try using the debug screen (alt+F12 on Windows) to enable the aero data in the action menus.

They reveal there is the same drag from the wheels on both sides, or even more drag on the left side, as can be seen here.

Your car behaves better with no wings, or with struts to brace the wings so they don't bend, but the reason it moves to the right is because the runway is a slight camber.

It is like this because the ground at the space center is completely flat, but the center is not by the runway, it is by the VAB, so the runway is like a very flat U shape, and gravity pulls you slightly to the side towards the VAB.

If your car stays straight it is fine, even if it has drifted, but if it turns the aerodynamics of the wings can make it turn more.

Hope this helps.

[Antoinebernadet]

Thank you for your quick answer, happy with your explanation.