Disambiguation
over "Laddermill" AWES and laddermill AWES! There are some confusions! And work yet to be done!
And focus on multi-wing non-loop ladders and also loop of wings of several sorts. Probably split topics will one day form in our space where the loop types receive their own topic trees, and the non-loop types receive their own topic trees. Perhaps we need new terms.
And ? spidermill http://www.energykitesystems.net/CoopIP/SpiderMillDynamics.html
?
And focus on multi-wing non-loop ladders and also loop of wings of several sorts. Probably split topics will one day form in our space where the loop types receive their own topic trees, and the non-loop types receive their own topic trees. Perhaps we need new terms.
And ? spidermill http://www.energykitesystems.net/CoopIP/SpiderMillDynamics.html
?
- Selsam and Ockels explored some kite systems that invited the vision of a ladder holding, if you will, rungs of a ladder. Confusion developed with TUDelft team let a brand name fall upon a single-line single-wing kite system be dubbed "Laddmill." The TUDelft team might have kept a vision of the matured multi-rung system, but the branding name for their project via "Laddermill" gained substantial presence. A further confusing process occurred for some thinkers: does a general laddermill have a simple non-loop structure, or does a general laddermill kite system have a closed loop structure where "rungs" are going up to a point and then those "rungs" go down? Then a similar structure or topology is the loop of wings that drive a closed loop that is genrally horizontal and not so much "up." A paucity of builds of multi-rung (multi-wing) running loop kite systems may be part of the reason strong names have not seemed to firm. Further, Faust described lifted loops with the working energy-generating loop held vertically, not wind-slanted; thus "lifted vertically-set driven loop" might be a type of laddermill. This paragraph is a post Aug. 28, 2020, by Joe Faust
- https://kitepower.nl/resources/meijaard99.pdf MODELLING OF THE DYNAMIC BEHAVIOUR OF A LADDERMILL,
A NOVEL CONCEPT TO EXPLOIT WIND ENERGY
J. P. Meijaard., W. J. Ockels, and A. L. Schwab. 1999 [not novel concept, as concept had priors]
- W. J. Ockels and H. J. van Grol, “Laddermill, a novel concept to exploit the energy in the airspace,” paper presented at the 1999 European Wind Energy Conference and Exhibition, Nice
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AWE notes and topic replies to editor@upperwindpower.com
- Conveyor loops, water wheels, seeds?,
- Hydro ladders
- Patents
- Soft-winged loops
- Rigid-winged loops
- Loop wind turbines
- Selsam's original drawings
- Ockels entry
- TUDelfts naming and confusion
- Discussion post
- mail-archive.com/vortex-l@eskimo.com/msg04414.html
- OurSiteLaddermill
- GeneralBroadLaddermill
- energykitesystems.net/Bolonkin/
- tallakt suggests a concept of letting top wings of outgoing ladder AWES be released for a glide
back for reconnect at the bottom of an out-pulling ladder of kited
wings. Automating the reconnection to the working outgoing tether of an arriving glider seems possible, he opined.
- Image by kPower on August 2020
- Brainwhere's video had an emphasis that they intend a ladder of their units to reach the jetstreams. Their presentation had flygen mode. PrincipalMichael Perlberger matriculated at TU Delft. Video We first mentioned Brainwhere in old forum at message #24759 Brainwhere was mentioned in the news about CHASING THE JET STREAM where Marc Hauser, a visionary Swiss entrepreneur and record-holding skydiver, is planning a high skydive to promote airborne wind energy. Brainwhere home website https://www.brainwhere.com/
Click image for enlarged view:
Re: kPower's "Improved Double-Acting Pumping LadderMill"
LM 2.O
Years ago in the old forum, I outlined how such could have a mod that kept the updriving rungs of wings and the downdriving rungs of wings nearly always within a vertical-trending near-catenary path by attaching stay lines above the upper sides of the ladder to a upwind set of anchors. Such mod seems to maximize the use of the driving wings. That is no longer would the driving sides of the ladder be canted to the ambient wind; that is, the generator would be vertically under the upper pulley set. The actual side runs of the macro ladder would tend to form a catenary; the catenary would flatten as the lifter kites increased the lift. Getting the pullies vertical above the ground-generator points allow the upgoing wings and down-going wings to be thus generally severe cross-winding. Without the mod wings on one side are going too much with the wind and the other side is fighting upstream. Might be better to have with the mod both working side sets cross-winding.
Further farming: drape the two-way vertical (almost) oscillating ladders from an aerial lifted line way; have a great multiplicity of lifted ladders in a kite-adder farm.
Quick sketch share: (working side lead and following line lengths are way of scale; having a substantial run line before changing directions would enhance power production efficiency) Sketch suppresses pulleys, lifter system, and AoA-changing system. . We may saturate the airspace with productive wing elements that are cross-winding; both upgoing and downgoing elements will be positively producing to the drive-generator forces! And the wing elements may be soft, semi-soft, or hard; the competition is on ...Get ready Gates! The SLK pumper space will soon be history even before it goes to solid market.
LM 2.O
kPower's improved Double-Acting LadderMill Concept
Improved double-acting pumping LadderMill with no idle return-side, nor need to pass kites around the pulley-loop.