Looking at F1 test pics I found something "strange" on a RBR
http://f1.imgci.com/PICTURES/CMS/12700/12754.jpg
http://f1.imgci.com/PICTURES/CMS/12700/12732.jpg
http://f1.imgci.com/PICTURES/CMS/12700/12740.jpg
http://www.formula1.com/wi/597...2011/dcd1115no09.jpg
I think it is a device to measure aerodynamic downforce but a friend of mine with some racing experience was not so sure.