Topic 000002: Clustered Energy Kite Drone Flygen Systems
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- 000002M3 ???
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- 000002M1 Clustered Energy Kite Drone Flygen Systems.
Cluster kite systems are centuries old. Putting generators in kited
wings is close to a century on. On the November 16, 2016, paper Antonello Cherubini and
Marco Fontana studied the two-branch cluster bifurcating from a main
the authors in their paper's abstract allowed the potential study of a
cluster of more than two branches of wind drones. PierreB is
in some discussion of the paper PDF linked below. This
topic thread could discuss the paper in detail along with cousin
concepts. A start on this matter in AWES21963
did not receive following. Now is another opportunity. The
challenge of streamlined tethers surfaces again. The challenge of
very long conductive tethers comes up. The main tether does not move
much while the branched tethers move across the wind in the dancing
kited drone wings. They introduced their
term: Wind Energy Drones (WEDs). Singular: WED, And: "with Y shaped tethering; a concept that was first envisioned
in patent  in 1976" And: dual-WED
system. And: "single fly-gen
wind drone". "single fly-gen WED," "split point" is where
the branching occurs in the Y tethering. The two upper cables
after the split point: "dancing cables".
The authors apparently derived from Payne and Tigner an understanding that let them state, "Several concepts have therefore
been proposed and patented to overcome this limitations and achieve near-zero
cable drag [8, 9].
" How "near-zero" would be the
interesting matter. In kite systems, downwind tethers give aerodynamic
drag and negative lift that is very non-zero. "the longer-shared cable is not moving
and does not generate any drag, and aerodynamic losses are only generated
by the two shorter cables"
misses addressing that the lower single cable still has aerodynamic
drag and negative lift; the stabilized lower single tether is not
dancing and so does not have additional dance-caused drag, but still
has substantial drag as the ambient wind is still impacting the tether.
Related: https://www.youtube.com/watch?v=PaeCZ72ghRQ video.