https://www.theatlantic.com/photo/2018/05/historic-photos-of-nasas-cavernous-wind-tunnels/560660/#img34 https://www.theatlantic.com/photo/2018/05/historic-photo

https://www.theatlantic.com/photo/2018/05/historic-photos-of-nasas-cavernous-wind-tunnels/560660/#img34 https://www.theatlantic.com/photo/2018/05/historic-photos-of... Magnetically levitating the model in the tunnel and measuring the forces by measuring how the magnets need to be driven to keep the model in place is pretty cool.