Breaking the Speed Record

The Bloodhound land speed challenger is likely to be back out on its South African lakebed track early next week. Engineers are now satisfied they understand why a heat alarm has been triggering on the car when it runs. Bloodhound was in the middle of trying to post a speed of 550mph (885km/h) on Friday when the sensor system alerted driver Andy Green that temperatures might be too high in the engine bay. He aborted, pulling up early having reached only 481mph (774km/h). Known as a “firewire”, the sensor is essentially two parallel wires running through a plastic sheath. This wiring criss-crosses the engine bay. When it gets too hot, the plastic melts and the two metal cores touch, triggering the alarm.


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