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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.

Body shop manager stole over $500,000 worth of government trucks and parts

The US Department of Justice announced yesterday that the manager of a collision and restoration business in Virginia admitted he helped misappropriate and sell vehicles and parts from the State Department. Specifically, he sold 12 Chevrolet Suburbans, a Hummer, and $7,500 worth of tires and wheels. He pled guilty to charges to commit theft of government property and wire fraud. He will likely see 18 to 20 months in prison, a fine of $4,000 to $40,000, and has already agreed to pay restitution of $416,020 and asset forfeiture of the same amount. According to the Department of Justice, the body shop manager, James Ratcliffe, worked with the owner of the business and a State Department official, both unnamed, to obtain the property. It started with the wheels and tires, which were delivered and sold on two occasions, one in 2011 and another in 2012. The trucks came later, and were sold throughout 2011 and 2013. Ratcliffe and the shop owner kept most of the profits, and shared some of the leftovers with the government official. In addition to the vehicles that were sold, the government official also gave Ratcliffe a pair of Suburbans for his own personal use. The Department of Justice estimated the total value of the SUVs at $96,400. In total, the group misappropriated $512,420 worth of property. Related Video:

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We record Autoblog Podcast #316 tonight, and you can drop us your questions and comments regarding the rest of the week's news via our Q&A module below. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
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