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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.

This 450-hp electric Lotus Evora is powered by Tesla and Chevrolet

When someone mentions an electric Lotus, the first thing that comes to mind is the Tesla Roadster, the California-based automaker's first vehicle. That car started life as an Elise before being heavily massaged and adapted by Tesla's engineers. In a similar spirit, the people at Onpoint Dyno are close to finishing Blue Lightning, a track-ready all-electric Lotus Evora. Blue Lightning uses a Tesla drive unit and a Chevrolet Volt battery pack, both mounted in the middle in place of the Evora's 3.5-liter Toyota V6. It's putting down about 450 horsepower at the wheels. The car was built for time attack sessions, so power is fed through custom forged wheels and super sticky Pirelli PZero Trofeo R tires, the same ones found on the last Chevrolet Camaro Z/28. There is a custom digital instrument cluster in place of the Lotus gauges. There's also a regen paddle on the left side of the steering wheel. With a full charge, Blue Lighting should go about 120 miles. While the car runs under its own power, it's only about 90 percent complete. It has no power steering, no firewall in between the seats and the motor and battery pack, no A/C, and a large hole where the shift lever used to be. Other final touches include fine-tuning the brakes and suspension. There is also a custom rear bumper coming that should make it look more like the new Lotus Evora 400. Onpoint Dyno expects the car to hit the track in the next month or so. Related Video:

GM adds 1,200 jobs at Detroit-Hamtramck plant

General Motors is making a big move at its Hamtramck, MI, factory, announcing it will add a second shift and hire over 1,200 workers within the next several months. It's expected that by early 2016, the factory will employ over 2,800 workers to build the Chevrolet Volt, Impala, Malibu, Cadillac ELR, and by early next year, the new CT6. According to GM Hamtramck spokesperson Courtney Zemke, 40 of the 1,200 positions are for salaried employees, while the remainder will be hourly positions. As for where these employees will go, positions are being made available across the factory, so GM isn't focusing on any particular area for its new hires. It's a similar story behind the hiring surge itself. GM said in its press release that the "second shift is necessary to meet forecasted market demand," a position Zemke reiterated. It's a matter of demand across the plant's portfolio, rather than any one particular product seriously outstripping supply. Naturally, the United Auto Workers is happy with the move. "The workforce at Detroit-Hamtramck is second to none," UAW Local 22 Shop Chairman Don LaForest said in the attached release. "We appreciate the opportunity to expand our UAW-GM family." Hiring is going on now, with the second shift slated to get underway in early 2016. GM's Detroit-Hamtramck Assembly to Add Second Shift and More Than 1,200 Jobs Plant will nearly double its workforce by early 2016 2015-10-22 DETROIT – General Motors is nearly doubling its workforce at Detroit-Hamtramck Assembly by adding a second shift and more than 1,200 hourly and salaried jobs. The addition of a second shift will increase the plant's workforce to approximately 2,800 people when hiring is completed. The second shift is necessary to meet forecasted market demand for the five cars produced at Detroit-Hamtramck. "This is the result of the award-winning vehicles Detroit-Hamtramck produces and the confidence GM has in our team to build world-class quality for our customers," said Plant Manager Gary West. Second shift hiring is underway, and the shift is scheduled to begin operations in early 2016. "The workforce at Detroit-Hamtramck is second to none," said UAW Local 22 Shop Chairman Don LaForest. "We appreciate the opportunity to expand our UAW-GM family." The 4.1 million-square-foot Detroit-Hamtramck Assembly opened in 1985. GM has invested $1 billion in the plant over the last six years, making it one of the company's most-agile manufacturing facilities in North America.