We can see the measured traction (at 0:26), and also wind speed at the beginning of this now old video (2012) which is linked to some other comments including Low radius loop - #4 by PierreB.
We can see the measured traction (at 0:26), and also wind speed at the beginning of this now old video (2012) which is linked to some other comments including Low radius loop - #4 by PierreB.