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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.

Chevy Trax engineer says GMC version possible

The Buick Encore is doing so well and its platform-mate the Chevrolet Trax has such good reviewer vibes going for it already, that a GMC version hasn't been ruled out. During the recent press launch, Automotive News asked lead engineer Al Manzor if the Trax could wear a GMC-branded suit, to which Manzor replied, "I think that is certainly possible." That's a long way from telling us anything about the probability of a GMC version of the Trax, and a legion of questions would need to be answered before it could happen. How would a GMC version be priced to leave room for the $26,465 GMC Terrain but not eat into sales of the $20,995 Trax or the $24,035 Encore? Or would that matter? Could it primarily be considered to encourage a new faction of The Yukon Set at the compact end, GMC buyers being famously committed to the marque? And of course, would there be a Denali version? It'll probably be a long while before we have any kind of answers, but if you want to see it happen, the door to your campaign of persuasion is at least ajar.

Chevrolet To Oversee Restoring Sinkhole Corvettes

What Mother Earth devoured, Chevrolet plans to resurrect. The carmaker said Thursday it will oversee restoration of the classic cars swallowed by a huge sinkhole beneath the National Corvette Museum in Kentucky. General Motors Design in Warren, Mich., will manage the painstaking work to repair the eight prize vehicles, the automaker said Thursday. The cars were consumed when the earth opened up early Wednesday beneath a display area when the museum in Bowling Green, Ky., was closed. No injuries were reported. The museum was open Thursday except for the area where the sinkhole occurred. Mark Reuss, GM's head of global product development, said the damaged vehicles rank as "some of the most significant in automotive history." "There can only be one 1-millionth Corvette ever built," he said, referring to one of the damaged cars. "We want to ensure as many of the damaged cars are restored as possible so fans from around the world can enjoy them." Just how the cars will be pulled out of the ground remains to be seen, said museum executive director Wendell Strode. The local fire department estimated the hole is about 40 feet across and 25 to 30 feet deep. The hole opened beneath part of the museum's domed section. "We feel pretty confident that most of the cars can be extracted," Strode said Thursday. "And we hope and believe that with just a little bit of luck, that all eight cars can be extracted and be part of the restoration." Chevrolet spokesman Monte Doran said some of the cars look to be in good shape, while others are buried in rubble. "It will likely be several weeks until we can get the cars out and assessed," he said. The GM Design team has helped restore other historic cars, but the Corvette project looks to be its biggest, he said. "These Corvettes are part of our history, and they want them restored properly," Strode said. "We're thrilled they're doing this." The cars looked like toys as they plunged into the hole, piled in a heap amid dirt and concrete fragments. The museum owns six of the cars while two - a 1993 ZR-1 Spyder and a 2009 ZR1 Blue Devil - are on loan from General Motors. The other cars damaged were a 1962 black Corvette, a 1984 PPG Pace Car, a 1992 White 1 Millionth Corvette, a 1993 Ruby Red 40th Anniversary Corvette, a 2001 Mallett Hammer Z06 Corvette and a 2009 white 1.5 Millionth Corvette. Pictures of the sinkhole showed a collapsed section of floor with multiple cars visible inside the hole.