These are the gigantic fans that drive the full scale wind tunnel at NASA Ames. If you want to get a feel for how big they are, look at the railing aroun

6 - NASA 80×120ft Wind Tunnel Drive Fans

80×120ft Wind Tunnel Drive Fans

These are the gigantic fans that drive the full scale wind tunnel at NASA Ames. If you want to get a feel for how big they are, look at the railing around the top right fan. Those small sticks are people.