CoolIP index                                                          Most recent edit: Friday May 10, 2013

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BowString Effect between High-Altitude Kites for High Load-Velocity

High mechanical-load velocity is a key both to high rope-driving and generator-driving efficiency. Avoiding geared transmissions is desirable.

A simple way to pump a kiteline to the ground at very high velocities from high altitudes is to have opposed tethered kites move apart crosswind, drawing taut the line between them. This cross-line can pull at high-speed an attached load-line running to a generator, just as a bow works to speed an arrow. Crosswind arrays can pump multiple load-lines in alternating phases.

As reported before, at lower altitudes, a single kite's tether can be the "bowstring" line to drive the "arrow" line to the load. In effect, these tri-tethers are high-advantage mechanical transmissions made of just string. Wubbo's SpiderMill could exploit this trick, if so flown.

Comment and development of this topic will be occurring here.       
All, send notes, links, drawings, papers, videos, plans, safety-critical findings, and photographs!

  • Terms and aspects:   
    • v
  • Related links and concepts:
  • Commentary is welcome:
    • Have an AWES that has two sets of wings on separate tether sets that spread apart a droop line bridged between the two sets. Attach to the droop line center an object to be snapped off the ground or ship or other aircraft or water surface and sent skyward; as the two sets of wings are controlled to spread apart, then the droop line tends to be straightened; the object is moved at a speed depending on the speed that the droop line is tautened. The object may be released during the hauling up. Or the object may be kept captive awaiting further assignment. This matter relates to some of the tech mentioned in BowString Effect between High-Altitude Kites for High Load-Velocity

      Recall F=ma for a=F/m from Newton. We are open for specific scenarios for such droop-line works. Some lifts by this method will want slow lifting; others will want fast; others will use slow and accelerated lifting. Slingshot or keep.

      Notice the reversal of the above: An object on a droop line kept aloft by two branches on a two-headed AWES may lower the object for various reasons by bringing the two heads together. 
       ~JoeF, May 10, 2013

    • Three-headed AWES may have a tri-string hold of an object; the object may be positioned by several means.   Continuous feed of water or foam to a fire-fighting nozzle over a fire with accurate positioning?  ~JoeF, May 10, 2013
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