Isn't aluminum very malleable though? I suppose at the salt flats it wouldn't be an issue since there's not much risk of running over anything. I wonder how it behaves at those speeds/temperatures.
this table of the X-15's fastest flights it appears they were all set at 100,000 feet or so. The atmosphere is about 1% as dense at that altitude as it is at sea level. Granted, the salt flats are going to have something like 87% of sea level density due to the elevation there but that's still 87 times as much air mass to punch through the X-15 had to deal with on its record setting flights.
We're actually getting pretty close to the land speed records closing in on the maximum low-altitude flight record, set by a privately owned F-104 Starfighter at 988mph in October of 1977. If these 1000mph land records turn out then we'll have an odd situation where the fastest land vehicle is faster than the fastest aircraft ever flow at low altitude for an FAI record.
The high speed wheels will be forged from solid aluminium, using low-risk techniques and materials that have worked well in the past
Each wheel weighs 95 kilogrammes, will spin at over 10 000 RPM and will be subject to a force of 50 000 ‘G’ at the wheel rim..
The wheels are fairly straightforward ...but nothing is simple when you’re planning to do 1000 mph!
No exotic alloy. Just billet aluminum, probably a very high grade type.
More info about the wheels:
Check out the different profiles they proposed to use. And the brake they plan to use is nuts.
HAVE/HAD: Mercedes, Porsche, Cadillac, Land Rover, VW (x5), Buick, Mitsubishi, Chrysler, Dodge, Nissan, Ford, GMC, Jeep
WANT: FIAT 500C Abarth, VW Scirocco Mk1, Alfa Romeo GTV, Lotus Esprit, Audi TT, 240Z, Lancer Evo VIII RS,
Hudson Hornet, Porsche 964, Mini Cooper, Caterham SV, M-B CLS63 AMG, DeTomaso Pantera