as dressing rooms, showers and laundering facilities which support prolonged live-in studies. Specifications and capabilities The dimensions of each of the two wind tunnels (Tropic Wind Tunnel and Arctic Wind Tunnel) are 60 by 10 by . Equipment scheduled for testing enters the tunnels via high by wide doors. In addition, chambers of 30 by 18 by occupy the area at the back of each tunnel. Tropic Wind Tunnel -18 °C to 74 °C (0 °F to 165 °F) 10-90% relative humidity Simulated rain up to 4 inches/hour Simulated wind up to Solar loading capability Arctic Wind Tunnel -57 °C to 49 °C (-70 °F to 120 °F) 10-90% relative humidity Simulated rain up to 4 inches/hour Simulated wind up to Solar loading capability Tropic Conditioning Room Dimensions: 25 by 15 by 4 °C to 65 °C (40 °F to 150 °F) 10-90% relative humidity above Arctic Conditioning Room Dimensions: 25 by 15 by -45 °C to 21 °C (-50 °F to 70 °F) References Earls, Alan R., (2005) U.S. Army Natick Laboratories: The Science Behind the Soldier (Series: Images of America), Arcadia Publishing. (Includes photos of the construction of DCCs.) This article contains information that originally came from US Government publications and websites and is in the public domain. External links DCCs page at the NSC Website US Army Soldier Systems service Research installations of the United States Army Military medicine in the United States Natick, Massachusetts