Nice little gem around Aero phyics and the corresponding delevoper app:
User garyjpaterson kindly explains the cryptic values in the “Wings app”. I will paste the both parts here for accessibility, but if possible please view the original post for updates and further discussion and comments. We already have some.
I’ll start with the left column – This is the ‘Wing’ name. With the wing app open, you can see the wing that these refer to as a green rectangle (or Red if its a fin, I think). The Body usually refers the the overall car, producing usually no lift/DF, but a significant amount of Drag.
The next is AOA – That is angle of attack, basically the angle of the wing is relative to the air. Usually the body is a positive, but can be a negative under heavy braking, depending on the car. This is live, so although your Rear Wing may be set at 10 degrees, it could well be 9.5 degrees or 11 degrees, depending on the cars current position.
GH – Ground Height – The height of the wing relative to the ground. Very useful for noting when the front wing or diffuser might start to stall. Its in millimetres.
CL – Coefficient of Lift (or Downforce if its a postive value) – Veyr important, this is the lift or downforce you are producing real time for each wing. Use this to help decide how much wing angle you want (along with CD). These numbers are live and will change based on a few things, mainly the ground height (if it stalls the number will drastically decrease) and angle.
CD – Coefficient of Drag – Same as above, only this time its drag. Useful for knowing if the wing changes you make are efficient (ie. you get a good amount of downforce against drag). You might find that the very high wing settings only add drag, not downforce, so keep an eye out.
° – This is just the static wing angle, so is not effected by the live pitch of the car.
YAW – The yaw angle of each wing relative to the air. Not super useful, but since most wings are effected by yaw angle (they become less efficient), you can monitor this though I’ve never been in a situation where this was necessary.
TOT CL – This is the total Coefficient of Lift taking into account all wings. Very useful for getting a quick and easy picture of how much downforce you have.
@X% front – This is your Aero Balance, very handy for setting the car up. Generally you want this to match your weight distribution (its at least a good starting point). For a most cars this is fine anywhere between 40% and 50%, though I wouldn’t advice anything above 50, and of course its car, track and most importantly user dependent. Do some experimenting and find whats best for you.
TOT CD – This is the total Coefficient of Drag taking into account all wings. Very useful for getting a quick and easy picture of how much drag you have.
EFF – This is just CL/CD, so your aero efficiency. Big numbers are better, as it means you have more downforce per quantity of drag. Some tracks (Monaco) you can sort of forget this and go maximum drag, but its important for most tracks.
TOT(KG) DOWNF – This is your actual amount of downforce in KG – though its not as easy or useful to read at the CL because it changes with speed. Only really useful for modding, if you have data that states a certain amount of DF at X speed, otherwise just use the CL.
TOT(KG) DRAG – This is your actual amount of drag in KG – though its not as easy or useful to read at the CD because it changes with speed. Only really useful for modding, if you have data that states a certain amount of Drag at X speed, otherwise just use the CD.
You can access the developer apps by finding your steam installation folder and navigate to assettocorsa/system/cfg, in my example:
C:\Program Files (x86)\Steam\steamapps\common\assettocorsa\system\cfg
Then you open the file “assetto_corsa.ini” and look for a line with “ENABLE_DEV_APPS=0”:
Turning this zero to a 1, you will have access to the dev apps including Wings.
If you are already there I also recommend to set ALLOW_FREE_CAMERA to 1. You have full control over your camera in replays now.