DIDIK Design Recent designs, proposals and projects by DIDIK DIDIK is a registered trademark Contact Frank Didik at inquiry at didik New York City, USA Designs, Projects, Proposals and Innovations by Frank Didik Vehicle Wikipedia It is essential that a vehicle have a source of energy to drive it Energy can be extracted from external sources, as in the cases of a sailboat, a solar powered car, or an electric streetcar that uses overhead lines Energy can also be stored, provided it can be converted on demand and the storing medium s energy density and power density are sufficient to meet the vehicle s DIDIK Design Recent designs, proposals and projects by DIDIK DIDIK is a registered trademark Contact Frank Didik at inquiry at didik New York City, USA Designs, Projects, Proposals and Innovations by Frank Didik Vehicle Wikipedia It is essential that a vehicle have a source of energy to drive it Energy can be extracted from external sources, as in the cases of a sailboat, a solar powered car, or an electric streetcar that uses overhead lines Energy can also be stored, provided it can be converted on demand and the storing medium s energy density and power density are sufficient to meet the vehicle s