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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 pickup truck plant in Flint to add 1,000 assembly workers

FLINT, Mich. — General Motors said Tuesday it will add 1,000 workers to build new heavy-duty pickup trucks at its plant in Flint, Michigan, and will give priority to GM workers who were laid off elsewhere. The announcement comes the day after GM said it was starting to hand pink slips to about 4,000 salaried workers in the latest round of a restructuring announced in late November that will ultimately shrink its white-collar workforce in North America by 15 percent out of 54,000. GM has come under fire from U.S. President Donald Trump and Midwestern lawmakers for its plans to stop production at five North American factories and cut up to 15,000 jobs in all. The automaker has said it is trying to find new jobs for 1,500 U.S. hourly workers at the affected plants. Flint's truck plant could be a haven for many of these employees. Sales of heavy-duty pickups in the United States have grown to more than 600,000 vehicles a year, up more than 20 percent since 2013, according to industry data. Prices for luxury models can easily top $70,000. GM on Tuesday will celebrate the launch of a new generation of heavy-duty GMC and Chevrolet pickups at the assembly plant in Flint, Michigan, that is now building all such trucks for the company. Elsewhere in the company on Monday, two people briefed on the cuts in the white-collar salaried workforce said GM is cutting hundreds of jobs at its information technology centers in Texas, Georgia, Arizona and Michigan and more than 1,000 jobs at its Warren, Michigan Tech Center. GM is filing new required mass layoff notices with state agencies and disclosed the cuts to lawmakers. The largest U.S. automaker announced in November it would cut a total of about 15,000 jobs and end production at five North American plants. The cuts include eliminating about 8,000 salaried workers, or about 15 percent. GM cut about 1,500 contract workers in December and said 2,300 salaried workers accepted buyouts, officials said. "These actions are necessary to secure the future of the company, including preserving thousands of jobs in the U.S. and globally. We are taking action now while the overall economy and job market are strong, increasing the ability of impacted employees to continue to advance in their careers, should they choose to do so," GM spokesman Pat Morrissey said, adding the bulk of the cuts should be completed in the next two weeks. Morrissey said GM would provide salaried workers with severance packages and job placement services.

Chevy's latest Silverado videos assume we're idiots

UPDATE: This article has been revised to reflect that any mention of materials used in a future Chevrolet Silverado is speculation. Can we have a sound, rational debate about the merits of aluminum versus steel? According to Chevrolet's latest marketing videos pitting the Silverado against the Ford F-150, the answer is no. The tone of all three ads is almost Orwellian: steel good, aluminum bad. Of course, this will all be a hilarious joke when an aluminum-bodied Silverado comes in 2018. That's an if, as a member of the General Motor public relations team has reminded me that any articles regarding future product are pure speculation. Until then Chevy needs to sell the current Silverado, with its body comprised chiefly of steel, against the Ford F-150's lightweight aluminum panels. Instead of touting the merits of the "most-dependable, longest lasting pickup," the strategy seems to center around negative propaganda towards the 13th element. The tone of all three ads is almost Orwellian: steel good, aluminum bad. Of the three videos, the most fair is Silverado vs. F-150 Repair Costs and Time: Howie Long Head to Head. Basically: aluminum costs more than steel, it's more difficult to repair, and requires special equipment for body shops. In terms of Chevy versus Ford, the blue oval truck costs more and takes longer to repair - an average of $1,755 more and 34 more days in the shop, according to the ad. But why stop there when you can have pitchman Howie Long raising an eyebrow at random facts? When Silverado Chief Engineer Eric Stanczak says of the Ford, "It's manufactured in a way that combines aluminum, rivets, and adhesive in a process that's different than Silverado." Long responds, "Huh. Interesting." At the end of the video, Long says "I'd be interested to know what happens to insurance costs." Note he's not saying anything substantive. If Chevy's legal team could sign off on some facts about insurance rates, it would be in this ad. On our Autoblog Cost to Own calculator, there is no significant difference in projected insurance costs between the two trucks. But at least that ad has facts. The other two videos are pure hype. In Cages: High Stength Steel, real people are asked what they think of aluminum and steel in a room with two cages. Then a bear is released into the room, and the subjects scurry to the safety of the steel cage.