From Iron Man's Iron Manual Page 11:
The ability of my motile iron fabric to achieve speed pulses of 150 -200 feet-per-second and with great precision allowed me to construct a seamless variable geometry wind tunnel. This was a revelation to me at the time, for the best conventional wind tunnels could only achieve Mach 4. Sure they had the bursting-diaphragm type that achieved M 15, or so, but you needed models and the cascade of information was too unreliable in those days. Then the state of computation was almost primitive compared to today. A trained eye could get better results with a slide rule.
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