BowString Effect between High-Altitude Kites for 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
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:
- 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