The Wind-Dam concept
began as "terrain-enabled" (terrain-suspended) rather than a true airborne
technology. Our contribution to the idea is to extend it, as a flying
machine, into true aviation.
Lets define Airborne Wind-Dams as aerodynamically self-supported fabric
barrier-walls that operate predominantly in drag mode. Recalling Loyd,
Drag Force in AWES design is comparable to Lift Force; a key fact
overlooked by many designers. This is a new category of aviation, with
precedents in barrage kites. New materials and designs enable us to think
megascale. Mothra rope-loadpath geometries already act in wind dam modes.
The fundamental technology is cheap and simple, and can scale to 10km high
by many more across, even within current UHMWPE performance specs.
To dam (or divert) wind for energy is just a start. Many other barrier
roles are worth pondering, such as guiding bird migrations around no-go
zones, and passive defense against drone warfare. Wind-dam structures
could perform precise local weather modification, present CO2 absorbing
media to wind flow on a megascale, and other novel uses. Someday
dynamically deployed wind-dams might steer hurricanes away from cities or
block atmospheric Tropical heat transfer to Arctic latitudes.
A wind-dam creates an artificial mountain effect on wind flow, with a
comparable micrometeorological field around itself. We can thus envision
applying the same hot DS physics that already enable model gliders to
exceed 400mph. Hot looping foils could range around the wind dam, popping
powerfully in and out of the wind flow, just as they do with natural
Lets claim as "obvious" in our open-circles any sky-kite idea "flown"
underwater, ahead of patents claimed on such a basis.
CC BY NC SA
Comment and development of this topic will be occurring here.
All, send notes, links, drawings, and photographs!
- Terms and aspects:
- mega-kites rather than terrain-suspension
- Wind-dam launching
- Wind-dam depowering
- Wind-dam dousing
- Related links and concepts:
- Commentary is welcome:
- Domina Jalbert made it clear to the world that any sky-kite system
has its obvious analogue in water, and thus obvious to those skilled
in the arts. ~JpF
- Laurie Chetwood's initial wind dam is a "blocked" venturi; its
fabric wall is too square to the wind to get a proper venturi
acceleration effect. A 30 deg. inflow cone is considered near ideal in
traditional aeronautics, which is not very dam-like. Can such
"windsock" proportions pay with large fabric WECS? Perhaps a "trumpet
horn" geometry is the trick.
We have considered wind dams made up of a "fabric of turbines," as a
flygen scaling method. The mysterious Salient White Elephant, an
anonymous blogger with many AWES ideas, has a similar wind-dam wall
concept, but it is not airborne.
Wind-dam launching, depowering, and dousing are important
considerations. A lifting kite component can serve in a pilot role,
simplifying the dam component job.