[QUOTE=Howard Wood;7706]Steve you will get your hand spanked by the forum creator for getting so far off topic!

Early race car aero aids were very much from the "angled bit of tin" school of design

I am not sure that I totally agree Howard. Some yes but..
Have a look at Chaparal, one of the leaders, they knw well about endplate and assymetric foils, as did the one on Scotts' Jag. Likewise the ones tested on the Mini van at Colerne and other places by Bruce.
One I did for a lower powered sprint car was calculated to be producing over 500 pounds of downforce at 75mph with much less frontal drag than the flat tin ones. Then we realised that a fair bit of sprint car wing is just to hold up the "sails" on the sides!