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With their stiff suspensions and hollow bodies, solar race cars tend to resonate like drums at high speeds, creating a rumble that can be disconcerting in the driver’s seat. “Our previous car, Tesseract, was very fast. It was taken up to 85 mph before the driver got terrified,” he said. “You reach the driver limit before you reach the motor limit.” (via MIT Unveils 90 MPH Solar Race Car | Autopia from Wired.com
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