"Crosswind Power" is the superior geometry for AWE,
SurfaceGens the safest configuration, & Kite Carts an attractive way to
drive a generator at high rpm.
Dave Lang's 2004 preliminary Drachen Foundation study,
Using Kites to Generate Electricity: Plodding Low Tech Approach Wins,
has two schemes called "buggy" and "sail" by Joe Hadzicki and Jose Sainz,
respectively, where a cart runs crosswind pulling a line unreeled from a
generator at each end of the run. How the crosswind path is to follow
wind shifts is undefined; and generator duty-cycle is not quite
50%. Other AWE schemes involve a generator cart on a circular or oval
track with conductive rails. The track takes wind from any direction but
has a high capital cost and a large part of a loop cycle is direct
downwind and direct upwind, with little or no power generated. All these
cart schemes must somehow take tremendous side forces by side resistance
of the wheels to the rails or surface. The following setup resolves
A Surface-Tether consisting of a tensile cable and electrical
conductor is run from a single elevated central anchor point to a
generator cart. Like the "buggy/sail" methods, the cart shuttles
back-and- forth crosswind, but downwind of the anchor. Like the loop
track, the cart carries the generator. Resistance to side force is
optimally provided by the tensile cable, with wind taken from any
direction. Generator duty cycle is far higher and capital cost far lower
than prior schemes
~Dave Santos June
Comment and development of this topic will be occurring here.
All, send notes!
Terms and aspects:
Commentary is welcome:
- The tracks of abandoned rail lines that run through rural
windswept regions may provide the foundation upon which to develop
kite-based wind power conversion . . . . pull the railcars in alternate
directions . . . electric generators on the railway axles . . . . use
3rd rail to pick up the power and transfer power to the grid or into
storage ~~ Harry
- There are railway designs that use different wheels for vertical
loads and transverse loads (eg: Montreal rubber-tire subway).
The concept below could work at certain coastal
locations in Newfoundland, Canada . . . there are abandoned railway
lines and rail rights-of-way in that region.
- The "track" is also called a "race".
The "cars" are also called "balls".
Together with magnets and a stator, the result is called "a generator"
The "kites" traveling across the wind are called "blades".
The "path" is also called "a circle".
A planar array of such kites traveling in a circle is called "a rotor"
The "tethers" are also called "fibers".
The configuration of the tethers following the circular path resolves to
Since the path goes into the sky, the result is a tube, made of fibers,
extending into the sky.
According to U.S. Patent 6616402, that tube extending skyward is called
Many levels of "kites" (blades) are combined to drive a single
The result: the flying version of "a SuperTurbine ®"
You are back to SuperTurbine®) where all roads lead...
(Superturbine® is a registered U.S. Trademark)
~~ Doug Selsam
Tether-Car AWE can be driven from a high flying kite in great wind
beyond any practical tower.
It really is hard to imagine high-altitude AWE requires
"driveshaft/towers" instead of kitestring.
If all roads lead to the SuperTurbine (R), surely beyond it is the
AirborneWindEnergy/conversations/messages/12246 rail and track
The Ground as an AWES Hub
Dynamic Snatch-Block Line-Trolley (crossing junctions)
Project Sea Tree
Stick-Slip Pumping to Haul a Loop Cableway