Gurney Strips Revisited
Here is a pic of an HPI wing that I purchased for my oval car. You will see on the sketch that it has a trailing lip. It is hard to see but the lip is at 90 degree angles to the back of the wing. Actually points forward.
This is called a Gurney Strip. The purpose of this strip is to increase the effectiveness of the wing or body element without causing a large increase in drag.
The HPI set comes with two wings whose only difference is the angle and size of the strip. The second wing has a less angled strip that is slightly wider.
We had a pioneer test this on his pan car earlier in the thread. I tested it on the back of my high speed body, but did not do a very good job of forming the lip.
Anyway this is worth a try if you use this style of wing or can form a lip yourself.
John