Dyson, the company that uses a centrifugal separator in its vacuum cleaner, has another piece of neat tech, a Bladeless fan that works on the Coanda effect.

It’s a really interesting concept, if you don’t mind spending $299.99 for a 10″ freaking table top fan.

In any case, Bill Sweetman notes that this technology might have application for a VTOL aircraft, though, as he notes this concept is very close to the ejector lift concept that has failed abysmally when it has been tried.

For quieting a fan, it might work, for generating lots of thrust for VTOL, I’d wait for more tests.