Figure 1.

Panel A – linear regression analysis between the active drag coefficient measured with the velocity perturbation method (VPM), and with the pressure sensors. Solid line represents the linear regression trend, dash lines the 95% confidence intervals (95CI), and point lines the 95% prediction intervals (95PI). Panel B – Bland Altman plots of the active drag coefficient measured with the velocity perturbation method (VPM), and with the pressure sensors. CD_{a_VPM} – active drag coefficient based on the velocity perturbation method; CD_{a_pressure sensors} – active drag coefficient based on the pressure sensors.