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Like aerodynamics, crash safety depends on the interaction of a number of factors. Material selection and shell geometry is key. A template is a starting point for experimentation much like a review of previous designs. That is why people do testing. Modern computer simulations can help but at some point there is a need to road test thoroughly. When i was a 12 year old boy my father took me to an auto show in the city. There was the car and designer of a land speed record jet car. I asked Art Arfons what was the most difficult part of building such a vehicle. He said raising the money.
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