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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.

Now's the time to buy a cheap first-gen Chevy Volt

Would you fork over 18 grand and change for a new Chevrolet Volt extended-range plug-in vehicle? If so, there are some for the taking. Since the updated Volt is about ready to hit dealerships, current models have become a lot easier to afford. For some reason, it appears the best deals are in Iowa, recalling some sort of Field of Dreams-style whispering voice luring car shoppers to their first plug-in vehicle, according to EV Obsession. To wit, a couple of 2014 Volts with a sticker price in the $35,000 range are being offered for less than $26,000 in that Midwestern state. Factor in the $7,500 tax credit from the federal government, and the Volt can be had for less than the sticker price of a Toyota Prius C compact hybrid. Chevy started priming that particular pump earlier this year, though didn't appear to have a ton of success. This past spring, Chevrolet was offering some impressive lease deals on the Volt, with monthly payments dropping to less than $250. There's a reason buyers will want to wait for the second-generation Volt. The 2016 version will have a 53-mile all-electric range, up from the 38-mile range in the current version, along with 106 MPGe. Some will say that the style is improved as well, and the first-gen's touch-sensitive control panel was discarded for more buttons. Still, if you're more concerned about price than having the newest car on the lot, now's a good time to shop. And speaking of the current version, sales remain down substantially. Last month, Chevy moved 1,380 Volts, a 45-percent plunge from a year earlier. Through August, Volt sales were down 37 percent this year compared to 2014 numbers, to 8,315 units.

Man surprises girlfriend with C7 Corvette

How would you react if someone just showed up at your place of work with a new, 2014 Chevrolet Corvette Stingray, complete with all the trimmings? While a lot of us would likely be flipping out over the still rare sports car, it's a fair bet many more of us would be responding like Pattie here, whose boyfriend stopped by her work to show her her new C7.
Speechless and shocked as she seems, she does end up taking it out for a drive, despite claiming she wasn't really outfitted to handle the car's seven-speed manual transmission at the time. From the sound of the video, we got the impression that she knew the car was coming, just not that it was anywhere near ready for delivery. It also, as Pattie says, seems like her boyfriend is more excited about the car than she (which, can we blame him?). Take a look down below for the full video of this C7 Stingray delivery.