Taming Wind

Aerofex has demonstrated its ducted-fan technology can tame the downwash of VTOL aircraft. It is designed to expand the downdraft and eliminate the recirculating flow typical of open-rotor craft. The enabler is the ejector system.

The exposed blades of helicopters and multicopters generate tip-vortices and swirl. As captured in the first two sequences (go full screen), conventional craft create significant turbulence which leads to drift (clouds). The steady flow characteristics of the Aerofex technology shown in the latter two scenes reduce vortices and expand the downwash to lessen its energy.

Why does this matter? For spraying crops the characteristics of the downwash are paramount. In manned applications, open-rotor swirl creates brownouts that risk injury to personnel and damage to the aircraft.