Leonardo's Pushbike - The Ride by Ellsworth featuring NuVinci's Continuously Variable Planetary (CVP) transmission
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Article Summary
April 13, 2007 A bicycle 517 years in the making? Well, perhaps not - Leonardo Da Vinci's original mind-boggling sketches of the first Continuously Variable Transmission (CVT) used a spiral shaped cog to achieve the goal of perfectly smooth gear ratio alteration. NuVinci's CVP transmission uses tilting balls to achieve a similar effect.
