Gary Kurtz estimates that using water instead of petroleum fluids in hydraulic systems could save 500 million gallons of gasoline in the U.S. alone. Saving fuel is one reason the professor of agricultural engineering and his students at Purdue University built a lawn mower that is propelled and steered with a water hydraulic system. They are demonstrating that water's lower viscosity boosts the mower's energy efficiency. They also hope to show that the technology may be practical for agricultural, construction, mining, and forestry equipment. Viscosity is a measure of how fast liquids flow. Water's lower viscosity means less energy is required to push it through the system. Kurtz estimates that the cost of building a water hydraulic system for his mower is approximately twice that of a comparable petroleum-based system. However, he points out that the costs of stainless steels and ceramics needed for making water hydraulic systems are dropping, "We have a proposal in to a golf course association now," says Kurtz. "They like the idea because oil leaking from the hydraulic systems in lawnmowers kills the grass on golf course greens." Danfoss, Fairchild Manufacturing, Indianapolis Valve and Fitting, Parker-Hannifin, and Swagelok provide equipment for the project. Jacobson, a division of Textron, donated the mower retrofitted with the water hydraulic system. For more information send e-mail to Kurtz at email@example.com.
Earlier this year paralyzed IndyCar drive Sam Schmidt did the seemingly impossible -- opening the qualifying rounds at Indy by driving a modified Corvette C7 Stingray around the Indianapolis Motor Speedway.
Wearables are changing the way we see ourselves. With onboard sensors that have access to our bodies, we are starting to know our physical selves like never before, quantifying our activity, our heart rate, breathing, and even our muscle effort.
Last week, the bill for reforming chemical regulation, the TSCA Modernization Act of 2015, passed the House. If it or a similar bill becomes law, the effects on cost and availability of adhesives and plastics incorporating these substances are not yet clear.
This year, Design News is getting a head start on the Fourth of July celebration. In honor of our country and its legacy of engineering innovation -- in all of its forms -- we are taking you on an alphabetical tour through all 50 states to showcase interesting engineering breakthroughs and historically significant events.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.