In the future, your Harley may start with a purr instead of a roar. The motorcycle of the future may run on fuel cells and create no emissions. A British company, Intelligent Energy, opened up a California sales office to sell its hydrogen fuel-cell bike, the ENV. The ENV stands for "emissions-neutral vehicle." The bike runs on hydrogen stripped from bio fuels—anything from sunflower oil to soybeans. A five-ounce can of hydrogen will power the bike up to 100 miles. Top speed is 50 mph.
The first ENV bikes are slated to appear in the United States and the United Kingdom in 2007. Retail prices will range from $6,000 to $8,000. Company officials acknowledged that finding readily-available hydrogen is a problem right now. It can be purchased from industrial chemical companies or at local welding shops, but it's not conveniently available for most consumers. California now has six hydrogen refueling stations and promises to have 100 by 2010. The current cost of fueling is $4 per tank, but that price is expected to come down to 25 cents.
The choice between helical and spur gears in gearboxes may seem straightforward. But with planetary gearboxes, however, the choice between helical and spur gears requires some additional thought. Here’s what you need to know to make the right choice.
Cas Smith is a biological engineer at Terrapin Bright Green, a consulting firm that specializes in green and sustainable design. At the core of his work is to explore how biomimicry can inform sustainable design. He discussed biomimicry and its implications for design and solving some of the world’s sustainability issues in an interview with Design News.
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