Mr. Kuttenkeuler, who invented the Efoil, an electric hydrofoil board that glides above the water’s surface, said hydrofoil technology was a common marine transport system in the 1980s but was ...

STOCKHOLM — During the golden age for ferries in the 1800s, steamboats dotted the shorelines of coastal cities to transport passengers. Then cars and trains took over. Now, driven by congestion ...

Over the last few months, however, Stockholm has been testing a vessel that may solve that problem: the world's first electric hydrofoil ferry. Developed by a Swedish start-up, Candela, a 30-seat ...

In addition to the environmental benefits, the electric hydrofoil has several other advantages. The batteries are relatively small, so they do not require massive charging infrastructure.

A new type of built-in closed space curvature booster impeller for heavy-duty piston pumps has been proposed to optimize the impeller pressurization capacity and cavitation resistance of the piston ...