Three months and $3,000 is what it took Instructable's poster Stryker (aka Ben) to build this great electric motorcycle. Unhappy with rising gas prices and ready to learn, Ben took a 1984 Honda Interceptor 700, gutted the gasoline components and added a 72V Advanced DC motor and 6 Yellow Top Optima batteries. He's explained the process here and here.

If a company offered this bike for sale, it wouldn't sell in great numbers. The 70 mph top speed is fine but it can only go 10-15 miles on a charge. Considering that Stryker lives just three miles from work, though, that "limit" is nonexistent for what he wants the bike to do. Of course, three miles is well within bicycle distance for some people, but the fun of creating a zero-emission motorcycle should not be dismissed. Don't believe me? Stryker is selling this bike so that he can build another.

[Source: Instructables via The Kneeslider]

It is possible to turn heat (or cold) into usable energy by using a Stirling engine. Invented by Reverend Dr. Robert Stirling and patented by him in 1816, the Stirling engine is rarely used these days for the generation of power or to do any real work, but it is often used as a model or even as a toy. However, that does not mean that the Stirling engine is not still useful, as we constantly see new ideas of how to use the Stirling to generate power from waste heat. Our Instructable of the day today focuses on this unique engine, and shows you how to make one for yourself using materials which are easily found and not too expensive. If you make one of these and figure out a way to take over the world, we want some credit.

[Source: Instructables]

Are you somebody who is always tinkering with your car to get the best mileage possible? If so, you may just be a hypermiler, and should share you finding with the rest of us. In fact, why not share your tip with Popular Science, Instructables and Treehugger in their newest contest. Of course, we are most interested in how you green your car here at AutoblogGreen, but any green projects count for this contest. To see the official rules and all of that jazz, click here.

If you happen to have a cool project that you want to share with our readers, of course you are welcome to do that too. Like, say... electrifying a VW Vanagon?

[Source: Popular Science]