 In 1954 Bull decided that a wind tunnel was too important to ignore, even if he could not arrange for funding through the DRB.Instead, he gained the ear of professors at Laval University in Quebec City, and Bull and a number of graduate students started work on a tunnel similar to the one he had earlier built at the UofT.It opened in the summer of 1955 and was capable of speeds up to Mach 4, but cost only $6,000, the result of using scrap for most of its parts.