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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.

Jaguar I-Pace vs. Tesla Model 3 and other EVs: How they compare on paper

The 200-mile club of electric vehicles is really growing. The most recent member is the Jaguar I-Pace, the company's first pure EV. It promises luxury, performance, style, and most important, good range. Nearly as recent is the Hyundai Kona EV, and while it doesn't promise luxury or performance like the Jaguar (it's also smaller), it does pack impressive range. With the introduction of both of these electric cars, we thought we would see how they compare against each other, and the other two big names in high-capacity electric cars: the Chevy Bolt EV and the Tesla Model 3. This isn't intended to be a direct, apples-to-apples comparison, as the four are quite different. If anything, they break into two groups: bigger and more luxurious, and smaller and less expensive. Then again, the number of vehicles with this electric range is small and comparisons to EV's with less range wouldn't be too kind to the other guys. If you want to learn more about these EVs, and compare them with other cars, be sure to check out our Car Finder and comparison tools. Horsepower and torque There is one clear winner here, and that's the Jaguar I-Pace. It packs a whopping 394 horsepower and 512 pound-feet of torque. That comes through a pair of electric motors (one at the front, another at the rear) that provide the Jag with all-wheel drive, the only one of these vehicles to offer it (at the moment). Altogether, it allows the I-Pace to have the best 0-60 mph time of 4.5 seconds. At the other end of the spectrum is the Hyundai Kona EV. It's front-drive, like the Bolt EV, and has effectively the same amount of horsepower as the Chevy at 201 horsepower, but its 0-60-mph time is almost a second slower. And the low-range version of the Kona, excluded because it doesn't go more than 200 miles between charges, is slower still. The Tesla Model 3 is the only vehicle with rear-wheel drive, and with a 0-60 mph of 5.1 seconds for the Long Range model, it is still very quick. Range and energy use Frequently, the all-consuming question with electric cars is, "How far can I go on a charge?" And to go the farthest, you need the long-range Tesla Model 3. It can go 310 miles. It has the added advantage of being able to use the network of Tesla Supercharger stations, though they are pay-per-use with the Model 3. Even the lower capacity Model 3, with just 220 miles of range, can use these stations.

Danica Patrick hands over keys to first 2016 Chevy Camaro

Alican "Turk" Boyacioglu got more than he expected this weekend when he picked up his new 2016 Chevy Camaro, the very first sixth-gen Camaro to be delivered to a private customer. That's because racer Danica Patrick was on hand for the delivery. The handing over of the keys took place at Texas Motor Speedway – a stop along the brand's Find New Roads trip. The journey is being conducted to introduce America to five new Chevy models: the Camaro and also the new Malibu, Cruze, Volt, and Spark. The road trip kicked off on October 19 and will conclude next week on November 14. Boyacioglu ordered up a red Camaro SS from Huffines Chevrolet in Lewisville, TX, north of Dallas. When he headed from Kansas to northern Texas to take delivery, he was pleasantly surprised to see Danica climb out of the car to hand him the keys. Though she may have raced under Honda power during her IndyCar days, Danica's NASCAR stock cars have always been powered by Chevrolet. She even drove a Camaro in the Nationwide Series. The smile on Turk's face ought to last him the nearly five-hour drive home to Wichita. For everyone else, deliveries are set to commence in earnest in the middle of this month. The first models to be delivered will be V6 coupes. Convertibles and turbo-four models will start shipping early in the new year. Customers will be able to choose between six powertrain combinations, made up of the 2.0-liter turbo four, the 3.6-liter V6, and the 6.2-liter V8, each available with a six-speed manual or eight-speed automatic. Pricing starts at $26,695 for the base 1LT trim and extends up to $37,295 for the 1SS. DANICA PATRICK SURPRISES CUSTOMER WITH 2016 CAMARO Huffines Chevrolet delivers first 2016 Camaro to Alican 'Turk' Boyacioglu DALLAS – Racecar driver Danica Patrick helped the team at Huffines Chevrolet deliver the first sixth-generation Camaro to a customer from Wichita, Kan., at the Texas Motor Speedway stop of Chevrolet's Find New Roads Trip today. Alican "Turk" Boyacioglu had been eagerly tracking the build of his 2016 Camaro SS and could not contain his excitement when Patrick emerged from the car and handed him the keys. "This whole experience was surreal," Boyacioglu said.