DLB 01 06 12

On this last flight of the test-bed before rework, the favorable downwash of ducted fans is clearly visible. Dust and debris are pushed away from the pilot, even while flying close to the ground.

The ducts prevent tip vortices from forming and isolate the fans from the external flow field. The latter quality permits unperturbed flight around obstacles and when transitioning indoors.

In contrast, the recirculating flow of open rotors has earned it a name, and the bane of pilots: "helicopter brownout" in the desert and "helicopter whiteout" in snow.

• Category

  Science & Technology

[juliandc86]

You have 3 years left to make a hoverboard...

[TidalClouds]

Dear santa...

[Ozwaldo Matos]

Fake and gay

[Pedro dos Anjos]

Fake

[Bruco Billy]

Em nenhum momento essa porra é filmada voando de longe. Por que? sefudê

[0503Hiroaki]

すげえ！欲しいなwww

[xpez]

its called the DUSTMAKER!

[thisisspartacus]

And a shoe with real power laces and a jacket with a built in dryer.

[SupeRChypA]

asians ..

[dragoncrystal24]

Or he could reduce the video sound without completely getting rid of it, and put some music to it or something, like Devinsupertramp

[ZavulonItOn]

And the whole lot of noise made by two giant fans.