Cool party trick: Van Arsdell's coffee cup stirling engine kit.
With the potential to achieve much higher efficiencies and run cleaner than internal combustion engines, Stirling engines—which use an external heat source to perform work—have long been a source of fascination for engineers. In fact, when Aeronautical Engineer Brent Van Arsdell first saw a friend of his running a Stirling engine on a bowlful of ice cubes, his first thought was, "I've got to build one myself." Since then, he has come up with ten different engine designs and "probably assembled a couple thousand engines by hand." And, he has made it his mission to educate the world about this unique engine design. Plus, he gets to show people the Ideal Gas Law in action! His company, American Stirling ( www.stirlingengine.com), develops Stirling engines for the educational market as well as demonstration kits. His most popular item: The MM-5 Coffee Cup Engine Kit, which includes all the components needed to build an engine that operates at 250 rpm on a Starbucks' espresso or 100 rpm on a bowl of Cherry Garcia ice cream. It's a great party trick, he says. As far as practical use, Van Arsdell says that his engines put out only a tiny amount of power—anywhere from 2 to 30 mW. The problem, says Van Arsdell: It's difficult to build a Stirling engine that puts out a high power density, and the cost would be prohibitive for many mainstream applications. In fact, if you know of a small Stirling engine that is cost-competitive with gas or diesel engines on a per kW-basis, Van Arsdell would like to hear from you at firstname.lastname@example.org.
Because of the increasing ubiquity of wearable technology, it would be easy to think that design of wearable devices is routine and involves common design and engineering knowledge. Missed efforts in development will be remembered once the devices are used in the field
This grab-bag of new fasteners and adhesives work with a range of materials they can attach to, as well as a wide variety of applications. Several are for use in consumer applications, such as wearables or other compact electronic assemblies, and some of the adhesives have extended service temperature ranges and cure at room temperature.
As governments, associations, and NGOs around the world seek to protect consumers, national and regional standards are becoming mandatory, challenging manufacturers and making testing and certification necessary for any product developed and brought to market.
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.