1999 Chevrolet Blazer on 2040-cars

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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.

Lutz dishes dirt on GM in latest Autoline Detroit

Bob Lutz sits down for Autoline Detroit - Click above to watch video after the jump
Autoline Detroit recently played host to Bob Lutz, and, as is always the case, the former General Motors vice chairman dished out some great commentary. Lutz was promoting his new book Car Guys vs. Bean Counters: The Battle for the Soul of American Business, and talk quickly turned to his role as it related to product development and high-level decision making at GM. While on the topic of brand management, Lutz revealed a few rather interesting tidbits about his former employer:
All Chevrolet vehicles were required to have five-spoke aluminum wheels and a chrome band up front, as part of the Bowtie brand's overall image.

Steve McQueen's last movie car, now Pawn Stars-owned, up for auction [w/video]

The last car Steve McQueen ever drove in a movie is officially up for auction. The 1951 Chevrolet Styline DeLuxe Convertible you see above is now owned by none other than Rick Harrison of Pawn Stars fame, but once ferried McQueen around the set of his last film, 1980's The Hunter. That flick saw the Bullit star play a bumbling bounty hunter and didn't exactly set the box office on fire. McQueen bought the car after production wrapped, and four years later it sold at his estate sale at the Imperial Palace in Las Vegas.
Flash forward to 2003, and the convertible received a full restoration back to near-stock specifications. Hagerty Insurance estimates the car to be worth around $45,000 without the significant providence. Given its ties to one of film's most popular gearheads, the old Chevrolet could fetch up to 10 times that when it goes under the gavel in Ft Luaderdale, Florida on March 22. You can head over to the Auctions America site for more information. You can also check out the trailer for The Hunter below.