de:Trudelturm, technological monument of aeronautical research in Berlin-Adlershof, built in 1934/1936
NASA Langley's Hypersonic Facilities Complex, 1969
Supersonic Wind Tunnel at Lewis Flight Propulsion Laboratory
Kirsten Wind Tunnel, Univ. of Washington
Preparing a model for testing, Kirsten Wind Tunnel
External balance, Kirsten Wind Tunnel
Man examining fans at Langley Research Center's 16 foot transonic wind tunnel in 1990, before it was mothballed in 2004.