Well the tittle says it all .
I've got a Protoform Stratus 3.1 bodyshell and wondered how to measure or at least give me an idea of the downforce produced at speed .
I've tried something but wanted to know if there is another way to measure it.
I've got an air gun (the workshop kind) connected to a 8 bar compressor . I've guessed , with my biker experience by blowing the gun at my face (with my arm hodling the gun stretched ) that the air is around 80-90 km/h (equivalent helmet open while riding feeling ) .
I've got an electronic 3kg max scale and basicaly put the car on it and blew wide open on the body . Tried several position (always parallel to the ground) and basicaly got a 55 gram peak
(even tried to put the air gun on the roof to shoot the rear spoiler but no luck)
Tried to measure the front downforce by putting the front end on scale and the rear end on a block and vice versa .
I got 15grams front and 45grams rear ...
So I tried the Lola 1/8 pan over my motonica p8.0r and got a much better result . A full 70 grams ... double
How could I improve the results of the measurements ? or is that it ?
A lot of people do say to feel a big diference between bodyshell so I was wondering that it should be bigger figures than this (If the downforce is 50grammes the handling aerodinamics diference should be rediculus , especialy knowing that you don't corner at 60 mph)
My first thought was that there was too much turbulences from the gun
But my putting my hands over the shell it is quite straight and directive .
Any thoughts are welcome
Ps: again pardon my poor english I'm french.