1 min readNFAC 80-foot-by-120-foot Wind Tunnel Drive FansNASADec 14, 2007 Image Article NFAC 80-foot-by-120-foot wind tunnel drive fans.Image credit: NASA Ames/Tom Trower NFAC 80-foot-by-120-foot wind tunnel drive fans. Image credit: NASA Ames/Tom Trower