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Construction of the basic tunnel posed no particular problems for the NACA, as the committee had extensive experience in building wind tunnels. The Pittsburgh-Des Moines Steel Company had been selected as the general contractor for both the Altitude Wind Tunnel and Icing Research Tunnel, and the company’s only challenge related to wartime priorities for materials. The real challenge came with the design and construc- tion of the refrigeration unit that would be used for both tunnels.6 When Willis Haviland Carrier, known as the “father of air conditioning,” saw the original plans for refrigerating the NACA facility, his reaction was “impossible.” The NACA wanted 10 million cubic feet of air per minute to be cooled to -67°F for the Altitude Wind Tunnel. Nothing of this magnitude had ever been done before. Furthermore, Carrier believed that NACA engineers would fail in their The IRT Takes Shape Figure 2–3. Shell framing for the Icing Research Tunnel, with Altitude Wing Tunnel in back- ground, 21 July 1943. (NACA C-IRT-4) 6 Pittsburgh-Des Moines Steel Company, “Invitation for Bids for Ice Tunnel Heat Exchanger and Equipment,” 21 September 1942, History Office, GRC. 23PDF Image | History of NASA Icing Research Tunnel
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