View Full Version : Fan Design

dtfcarline - n/a
11-Aug-06, 11:12 AM
I dont know if this will be of interest to anyone, but a year or so ago I visited a company in Berlin called Evologics who make all manner of bio-inspired equipment. They have come up with a new propeller design based on continual planar surfaces that runs with a greater efficiency and with much less noise (this is why we were interested, for underwater propulsion) than a standard propeller. No leading edges on the prop. mean no tip-vortices, so less energy is lost in combating turbulence.

There is not much information about it, but there website is:


There is a video of the props working on the home page of this website, but is probably in german:


Kinda neat idea, thought someone might find it interesting


kach22i - n/a
11-Aug-06, 03:49 PM
I've wondered why I have not seen something like in the market place before. This is not my area of expertise, but I've thought before that the fan tip strength could be increased by connecting them at the perimeter. Also you may end up with closer tip blade clearances/tollerences to the duct and this would make it more quite and more efficient.

Nice find. http://hovercraft.org.uk/images/icons/smiley_icons/icon_smile.gif