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when aeronautical engineers want to know

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how air will flow over one of their

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designs they can build a model and test

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it in a wind tunnel but thanks to

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today's supercomputers like this Cray

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XMP there's a less costly less

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time-consuming way to evaluate their

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ideas these ultra-fast machines with

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incredibly large memories make it

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possible to do timely accurate

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simulations before committing to

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expensive hardware and it's not just air

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flow that can be studied here the flow

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of water around a submarine is being

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even the flow of fuel through the

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shuttles main engines can be examined

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recently scientists producing these

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simulations at NASA's Ames Research

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Center in Mountain View California began

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using a new supercomputer the Cray two

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though much smaller than the previous

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generation great it's faster than any

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computer in the world performing 250

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million calculations per second it also

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has 10 times more memory than any

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existing machine in fact the cray 2 is

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so powerful that its circuitry is

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continually immersed in a cooling

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solution to keep it from overheating

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putting this new supercomputers

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capabilities into proper perspective is

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the manager of the numerical aerodynamic

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simulation program at Ames Ron Baker

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what you see in this this small tank of

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liquid in the crate who is equivalent to

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a warehouse a small home computer the

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crate - makes more comprehensive

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simulations possible for example the

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people at Ames have been able to

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simulate airflow around the shuttle

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orbiter itself but the orbiter attached

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to the solid rocket boosters large

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external fuel

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as opposed to great a problem for any

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computer today ames research scientist

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and he shows you but with the cray-2

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becoming accessible to us that will give

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us enough storage or memory where we can

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actually solve the flow around this

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whole configuration and in some cases it

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may be very important to see what that

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flow is in order to maybe be able to

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take safer routes when the thing is

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the cray-2 will also play a key role in

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technology development for the NASA DoD

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national aerospace plane program leading

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to an entire new family of aerospace

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vehicles in the next century