Here's a bike that runs entirely on electricity. Zero Motorcycles of Santa Cruz, CA has introduced the Zero DS, a fully electric, dual-sport motorcycle built for both the city street and the dirt trail. The Zero DS was designed from the ground up as an electric vehicle. Each component on the bike — such as aircraft-grade aluminum with lightweight strength — was designed to minimize weight and maximize energy density. The Zero DS is emissions free, and its parts are non-toxic and almost entirely recyclable. The bike's power pack consists of lithium-ion cells that are landfill-approved.
Producing high-quality end-production metal parts with additive manufacturing for applications like aerospace and medical requires very tightly controlled processes and materials. New standards and guidelines for machines and processes, materials, and printed parts are underway from bodies such as ASTM International.
Engineers at the University of San Diego’s Jacobs School of Engineering have designed biobatteries on commercial tattoo paper, with an anode and cathode screen-printed on and modified to harvest energy from lactate in a person’s sweat.
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