Can This Startup Revive Soviet-Era Hydrofoil Tech?

In the 1960s, Soviet engineers built a mashup of a plane and a boat that could fly a few feet above an ocean or lake at high speeds. The vehicle, which they called the ekranoplan, or screenplane, took advantage of a property of airflow that gives extra lift by pushing air down to the surface. But only a few dozen ekranoplans were produced—including one dubbed the Caspian Sea Monster—and the idea was largely forgotten.

Billy Thalheimer says it’s time for another look, at least when the idea is paired with hydrofoil technology. By adding electric propulsion and hydrofoils to improve balance, a revamped ekranoplan—he calls it a seaglider—can offer a carbon-free alternative for overwater routes such as New York to Boston, Los Angeles to San Diego, or Miami to the Bahamas. “There is something inherently novel about a seaglider,” says Thalheimer, an aerospace engineer from the Massachusetts Institute of Technology who in 2020 co-founded Regent Craft Inc., a Rhode Island company dedicated to reviving the idea.