Robert Q. Riley Enterprises' XR3 hybrid prototype
Here's one for the dedicated back-yard mechanic. Arizona based Robert Q. Riley Enterprises has now released construction plans based on the completed prototype of its do-it-yourself, two-passenger, XR3 plug-in hybrid, a vehicle that's capable of up to 225 miles per gallon, has a top speed of 80 mph and acceleration comparable to a conventional small car. The USD$200 instructional package for the modular, three-wheeled sportscar includes printed drawings, electronic 3D virtual models, computer files that enable vendors to make parts plus a DVD that outlines the building of the car.
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