There was a ten step process. There was a stationary vacuum test to assure that the components would operate in a vacuum, there was a moving open air test on a

There was a ten step process. There was a stationary vacuum test to assure that the components would operate in a vacuum, there was a moving open air test on a rail, and the final moving test in the mile long low-pressure tube. The other 7 steps were design and safety reviews and a check of the control system. 3 of the 27 teams passed the first 9 steps and participated in the final speed test.