Testing Bloodhound's 'bullet-proof' wheels


The British Bloodhound car will need "bullet-proof wheels" when it tries to break the land speed record in 2012.

The aluminium discs that will act as its wheels will have to resist being blasted by a stream of grit thrown up from underneath the vehicle, as it races across a dry lake bed at over 1,000mph.

Engineers are trying to identify the best alloy for the task.

This has resulted in them firing pieces of grit at samples of metal using a gas gun at Cambridge University, as shown here by this super-slow motion footage.

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