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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.

GM to trim Russian output, raise prices amid currency woes

General Motors is shutting down its factory in Russia's second largest city, St. Petersburg, from the middle of March until the middle of May as the country's currency, the ruble, continues to give economists fits. The ruble's value has plunged due not only to western sanctions, but a precipitous fall in oil prices. We knew these factors were already impacting the auto industry there, as Ford reported in its 2014 earnings statement, and now they're forcing GM to cut production at the factory, shown above, that is responsible for production of the Chevrolet Cruze and Opel Astra. Meanwhile, Automotive News is citing Russian outlet Kommersant as saying that GM has hiked its prices in the country by an average of 20 percent over the past two months. While a GM spokesman confirmed the St. Petersburg plant would be shut down for the two-month span reported by Kommersant and AN, he would not confirm the price increase. News Source: Automotive News - sub. req.Image Credit: Alexander Nikolayev / AFP / Getty Images Earnings/Financials Plants/Manufacturing Chevrolet GM Opel opel astra

Ford Mustang chief engineer, mid-engine Corvette | Autoblog Podcast #488

Note: There were some technical difficulties that prevented some of you from downloading this week's podcast. The player and link below should be working now, and the file has reached iTunes and other feeds as well. Thanks to everyone who wrote in to let us know of the issues! On the podcast this week, we have some questions for Ford Chief Engineer Carl Widman. Plus, Associate Editor Reese Counts joins Mike Austin to talk about the latest news, most notably the spy photos of the upcoming mid-engine Corvette. We also chat about the Jaguar F-Type Coupe, the Nissan Armada, and why 0-60 mph is a stupid performance figure. And, of course, we get into some Spend My Money advice, telling strangers what car to buy. And new this week is a cost-no-object what-cars-would-you-buy game. The rundown is below. And don't forget to send us your questions, money-spend or otherwise, to podcast at autoblog dot com. Autoblog Podcast #488 The video meant to be presented here is no longer available. Sorry for the inconvenience. Topics and stories we mention Mid-engine Chevrolet Corvette spied Chevy Bolt EV comes with 238 miles of range Ford will sell self-driving cars by 2025 Jaguar F-Type Coupe 2017 Nissan Armada (yes, Mike knows it's not a Patrol) Ford Mustang Chief Engineer Carl Widman interview Spend My Money - we give purchase advice Why 0–60 mph is a stupid performance test Rundown Intro - 00:00 The news - 03:30 What we've been driving - 16:20 Carl Widman - 26:44 Spend my money - 37:03 New fun game - 51:48 0–60 mph is overrated - 56:50 Total Duration: 1:04:57 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Feedback Email – Podcast at Autoblog dot com Review the show in iTunes Podcasts Chevrolet Ford Jaguar Nissan Car Buying nissan armada mid-engine corvette jaguar f-type coupe