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How GM engineers are using diaper 'snow' to keep you warm

Testing how snow affects General Motors' vehicles isn't really a problem right now for the company's engineers, but in the dog days of summer the process isn't exactly easy. The only real option is for them to book time at the automaker's climatic wind tunnel. However, a flash of brilliance from an engineer allows snow to be simulated regardless of the temperature outside, and the discovery is all because of his daughter's wet diaper. The realization came to GM Thermal Systems engineer Nicholas Jahn while he was swimming with his daughter and noticed how her diaper ballooned in size in the water. He found out the substance that makes this possible is called sodium polyacrylate. When the material gets wet it grows and forms fluffy flakes that are a close imitation of snow. Best of all, the stuff can be prepared easily any time of the year, and it's reusable. The engineering team uses the material to test the effectiveness of the heating systems of GM's vehicles. They spread the sodium polyacrylate over the inlets at the base of the windshield to obstruct the airflow and then crank the heater. After some time, they can see how much is being sucked into the system and design more efficient systems in the future. See how the process works in the video above and read about the diaper discovery in GM's press release below. Diapers Change Chevy Cruze Winter Warm-up Time GM validation engineer uses diaper material "snow" to reduce frigid drives 2015-01-06 DETROIT – An item commonly found on an infant's changing table is helping General Motors' engineers simulate snow year round, ensuring heating systems in cars like the 2015 Chevrolet Cruze can quickly and efficiently warm its interior. Packed snow can prevent air from entering the inlet panel at the bottom of the windshield, obstructing the flow of air into the heating system and reducing the amount of air it can push out. This can lead to less efficient warming of the car's interior and windshield defrosting. "The last thing anyone wants to do when it's freezing cold out is scrape their windshield," said Nicholas Jahn, GM Vehicle Thermal Systems engineer. "The testing we perform on the Chevrolet Cruze with the diaper material allows us to maximize the car's heating capabilities." Ironically, Jahn stumbled upon his diaper-based testing method in the middle of summer. During a swim with his daughter, he noticed her diaper multiplied in size when it came into contact with water.

That time we lapped Indy with Tony Kanaan in a Corvette Z06

We're here in Indianapolis, IN, attending this weekend's 99th running of the Indy 500. The big event happens tomorrow, but the city is buzzing today with all sorts of pre-race festivities. For us, that means checking out Indianapolis Motor Speedway a day early, and getting a hot lap around the racetrack in the official Indy 500 pace car – a 2015 Chevrolet Corvette Z06. Our driver for the occasion is IndyCar racer Tony Kanaan, who won the Indianapolis 500 in 2013. Of course, he'll be competing tomorrow, leaving pace duties to none other than Jeff Gordon. Check out our minute-and-a-half-long lap of the Indy 500 track in the video above, where Kanaan hugs the wall in true race style, getting the Z06 past 150 miles per hour on the back straight. Stay tuned for more Indy 500 coverage later this weekend.

Question of the Day: What's the most irritating car name?

You hear a lot about how the Chevrolet Nova was a sales flop in Mexico because "No va" means "it doesn't go" in Spanish; in fact, the Nova sold pretty well south of the border, and in any case most Spanish-speakers know that "Nova" means "new" in Latin and Portuguese. However, General Motors doesn't deserve to be let off the hook for bad car names, because the Oldsmobile Achieva— no doubt inspired by the excruciating "coffee achievers" ads of the 1980s— scrapes the biggest fingernails down the screechiest chalkboard in the US-market car-name world. That is, unless you think Daihatsu's incomprehensible choice of Charade was worse. Meanwhile, Japanese car buyers could get machines with cool names like Mazda Bongo Friendee or Honda Life Dunk. It's just not fair! So, what car name drives you the craziest? Related Video: Auto News Design/Style Chevrolet Honda Mazda Daihatsu Automotive History questions car names