Aerodynamic Forces

Can We Race Stockcars in the Rain?

In sports car racing, the only discernible change the viewer sees when it rains is that the normal “slicks” (which have no treads) are changed out for rain tires. Thus the calls for NASCAR to develop a rain tire good enough to allow us to continue races, even when it rains. […]

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Browne, Josh

Next-Gen Tires: Chewy on the Outside, Crunchy on the Inside

Listen to SiriusXM NASCAR radio, or peruse any of the racing websites and you will find a lot of theories about how races should be changed to make them ‘more exciting’. To try to amp up the All-Star Race, NASCAR went with four 20-lap segments, followed by a realignment (the cars were ordered in rank of average finish over the first four segments) and a 10-lap shootout. With no series points on the line, that should have made for an exciting evening of hard driving and competitive racing.

Or not. […]

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Asphalt

Hey Larry Mac! Cars Do Not Speed Up in the Grass!

Ever had one of those things that you never noticed before, but when someone brings it to your attention, you notice it and it drives you crazy? Frank Smith emailed me about an observation made by television commentators that was driving him nuts. Now that he mentioned it, I keep hearing it and it’s driving me nuts, too.

Not to denigrate Larry Mac and the other television commentators. I’ve learned a lot from Mr. McReynolds. There’s a perfectly good physics explanation for why he (and others) keep telling us that cars speed up when they get into the grass on a racetrack.

Assuming that the driver has the presence of mind to take his foot off the gas, this is impossible. […]