Dave Santos answers a query:
dave santos santos137@yahoo.com [ayrs] <ayrs@yahoogroups.com
|
|
| Group: AirborneWindEnergy |
Message: 19791 |
From: dave santos |
Date: 3/8/2016 |
| Subject: Re: wingboarding |
Its
an above-average tethered-wing backstory, how a flying cartoon bear
inspired a child to grow up into an aerospace engineer to make real the
fantasy. Its too easy to destabilize a flying wing in an instant at
110mph and very hard to make something like this safe in all modes. Its
extravagant to have a piloted towplane for a single customer at a time,
who soon bores. Expect daredevils only for this particular design, but
that someone, someday will figure out a better way to get similar
thrills cheaper and safer, like maybe a stand-on-top slow-flier soaring
glider.
On Tuesday, March 8, 2016 11:32 AM, "edoishi edoishi@yahoo.com [AirborneWindEnergy]" <AirborneWindEnergy@yahoogroups.com
|
|
| Group: AirborneWindEnergy |
Message: 19792 |
From: dave santos |
Date: 3/8/2016 |
| Subject: Re: wingboarding |
A
practical stand-on-top slow-flyer glider could be based on zanonia seed
flight. The negative camber slow-flyer airfoil hosts a large lifting
vortex in the upper concavity that the rider stands in the seed outline
zone. The wing could winch-tow up and release, with an effective
soaring capability the aerotow-only version lacks. For both designs,
non-towed landings are part of the appeal, but a larger soaring wing
would land slower and safer.
This is an amazingly high-performance slow-flyer design, with around a hundred seeds stacked in a compact launching pod-
On Tuesday, March 8, 2016 2:35 PM, "dave santos santos137@yahoo.com
[AirborneWindEnergy]" <AirborneWindEnergy@yahoogroups.com
Its
an above-average tethered-wing backstory, how a flying cartoon bear
inspired a child to grow up into an aerospace engineer to make real the
fantasy. Its too easy to destabilize a flying wing in an instant at
110mph and very hard to make something like this safe in all modes. Its
extravagant to have a piloted towplane for a single customer at a time,
who soon bores. Expect daredevils only for this particular design, but
that someone, someday will figure out a better way to get similar
thrills cheaper and safer, like maybe a stand-on-top slow-flier soaring
glider.
On Tuesday, March 8, 2016 11:32 AM, "edoishi edoishi@yahoo.com [AirborneWindEnergy]" <AirborneWindEnergy@yahoogroups.com
|
|
|
@@attachment@@
|
| Group: AirborneWindEnergy |
Message: 19793 |
From: joe_f_90032 |
Date: 3/8/2016 |
| Subject: Re: wingboarding |
| Group: AirborneWindEnergy |
Message: 19794 |
From: joe_f_90032 |
Date: 3/8/2016 |
| Subject: Re: wingboarding |
| Group: AirborneWindEnergy |
Message: 19795 |
From: dave santos |
Date: 3/9/2016 |
| Subject: Kites and Airborne Algae as CO2 removal means |
We
have pondered the well-known idea that seawater might be pumped high
into the atmosphere into aerosol form to seed clouds to increase solar
reflectance. Our twist was to consider kites in the lifting role.
A
similar idea is that algae might be seeded high above by kites, and
would float for extended periods, multiplying in sunlight and taking up
CO2. The particulates would fall back to the sea, perhaps seeding rain
drops along the way, and to then sink to the bottom, effectively
sequestering excess atmospheric CO2 as limestone formation.
Its
not clear if this is a powerful CO2 removal method, but the question is
posed. Algae has long been known to be present as a dilute aerosol, and
there may be an allergenic side-effect to avoid-
|
|
| Group: AirborneWindEnergy |
Message: 19796 |
From: snapscan_snapscan |
Date: 3/9/2016 |
| Subject: Open Tensegrity Shafts: Mechanical power transmission using ultralig |
All,
I
have done some more testing with torsion based power transmissions and
found something that works at least on a small scale and in my dirty
basement. I have published the findings here:
Open Tensegrity Shafts: Mechanical power transmission using ultralight torsional rigid structures... - someAWE
And for the lazy a direct link to the video at the end of the post:
Open Tensegrity Shafts
|
| |
| Open Tensegrity Shafts Mechanical
power transmission using ultralight torsional rigid structures made of
components in compression and tension. This video is part of a blog
entry t... |
| | | Preview by Yahoo |
|
Enjoy! /cb
PD:
Dave, I know you do not like torsion (nature does not use it and it
does not scale...) - but I thought it would make for some interesting
talking points for the next days ;) |
|
| Group: AirborneWindEnergy |
Message: 19797 |
From: joe_f_90032 |
Date: 3/9/2016 |
| Subject: Long Loops |
Long Loop We have many mentions of fan-belt drive, rope-drive, moving loop ... The
kite tether set is seen at an intermediate station as two lines; but
the two lines are actually part of a loop. The ground pulley driven by
the loop drives a generator or pump. The aerial pulley is
driven by energy gathered from the wind. Tensions are managed so the
system does not winch itself out of the sky; that is, part of the
wind's energy gathered ever lifts the system enough so the
self-winching does not occur.
The
fan-belt methods is not a long-structure torsion method, but keeps the
working-loop tether assembly a tension configuration. The long-loop
methods retain groundgen character. Gordon is pleased.
Continuous
generation may occur. Recovery cycle is not involved. Challenges
remain. Oscillations in the slacking half of the loop are
challenging.
Moving loops may also carry materials up and materials down. ------------------------------------------------------------------------- |
|
| Group: AirborneWindEnergy |
Message: 19798 |
From: dave santos |
Date: 3/9/2016 |
| Subject: Re: Open Tensegrity Shafts: Mechanical power transmission using ultr |
Hi Christof,
Torsion-transmission
should be tested along with all other methods. I present the
pessimistic data (no large-scale similarity cases in Nature or
engineering) to balance the one-sided optimistic claims ("All roads
lead to the SuperTurbine").
Yours
is a very nice experimental case. Its clear that rigid elements are
workable at smaller scales (ST, Daisy, and now ) and should be tested
further to determine safety and performance limits.
An
interesting comparative interpretation of long-distance transmissions,
besides power-to-mass, is to measure the loadpath length. Torsional
transmission is a helical loadpath system. Pumping a single line or
driving a cable-loop is non-helical, but either sine-wave or
continuous-wave-with-slack-return-side. These differences constrain the
trade-offs at small-scale.
Its
a heuristic presented on the AWES Forum that reliability of a kiteline
loadpath is inversely related to length; the longer, the less reliable
in proportion. Therefore, a helical loadpath is longer according to its
pitch-angle.
This
is just one more hint toward calculating which sort of long-distance
transmission basis is best in a given AWES situation. The one certainty
is that rigid-spar-dependent transmissions, compared to purely tensile
versions, are most strongly affected by square-cube mass
scaling-limits. Below that limit, its still an open question what
fundamental transmission basis is best, and testing is the best way to
settle doubts,
daveS
On Wednesday, March 9, 2016 7:26 AM, "snapscan_snapscan@yahoo.de [AirborneWindEnergy]" <AirborneWindEnergy@yahoogroups.com
All,
I
have done some more testing with torsion based power transmissions and
found something that works at least on a small scale and in my dirty
basement. I have published the findings here:
And for the lazy a direct link to the video at the end of the post:
|
| |
| Open Tensegrity Shafts Mechanical
power transmission using ultralight torsional rigid structures made of
components in compression and tension. This video is part of a blog
entry t... |
| | | Preview by Yahoo |
|
Enjoy! /cb
PD:
Dave, I know you do not like torsion (nature does not use it and it
does not scale...) - but I thought it would make for some interesting
talking points for the next days ;)
|
|
| Group: AirborneWindEnergy |
Message: 19799 |
From: dave santos |
Date: 3/9/2016 |
| Subject: 3-Ball invention show to feature AWE |
News
by phone from Shawn Thomas of New York that he has been approached by
3-Ball Entertainment as an inventor to feature in a new show, somewhat
like Shark Tank, but friendlier and inventor-oriented. He pitched AWE
generally, and they got excited about our concept space and plan to
feature it. Who is 3-Ball? A newly restructured venture in the
Hollywood entertainment industry-
|
|
| Group: AirborneWindEnergy |
Message: 19800 |
From: dave santos |
Date: 3/9/2016 |
| Subject: Getting AWES R&D ready for Unscripted TV |
There
are now several major mass-media projects featuring AWE that are either
already in production (AWE Documentary) or in assessment or planning
(NatGeo, Original Productions, 3-Ball). The first in line AWE
Documentary, led by kPower, and we intend to negotiate agreements with
these parties that give AWE development an equity-stake. As the drama
unfolds in the next few years, let some of the profits fund research.
The
primary format is "unscripted TV", and its the hottest thing going,
with low costs and huge profits. While the people featured are real,
they are also media-competent, working as a team with the production
crew to create great footage, and to define the narrative. Then in post
production, editing and writing weave hundreds of hours of raw video
into a compelling story.
Get
ready to have your AWE effort featured in some form, either from afar,
as news coverage does, or from your stock footage and interviews, or by
embedded camera crew. Here is a very insightful view into the modern
process, but AWES Forum readers will note the error in attributing a
quote we well know to be by pioneering pilot-writer de Exupery, to
Picasso (who said many fine things)-
|
|
| Group: AirborneWindEnergy |
Message: 19801 |
From: joe_f_90032 |
Date: 3/9/2016 |
| Subject: Re: wingboarding |
Doug Selsam on topic: 1)
Always interesting to see ideas I've had forever occur to
others... Sky-surfing. But I think my way will be more
exciting... 2)Wolfie Zeiss (whom I have hung out with) tags the top of another glider with his bare foot at time 1:21 (he regularly flies barefoot - never seen him fly with shoes) https://www.youtube.com/watch? v=cWjbyjl_tyI |
|
| Group: AirborneWindEnergy |
Message: 19803 |
From: joe_f_90032 |
Date: 3/9/2016 |
| Subject: Re: Open Tensegrity Shafts: Mechanical power transmission using ultr |
On topic, Doug Selsam, notes:
My
first airborne wind energy patent U.S. 6616402, as well as all the
international versions, feature many examples of torque transmission
from multiple rotors to a ground station through elongate "tensegrity"
structures. All roads lead toSuperTurbine(R). :)
~Doug Selsam
=======================================
=== Moderator note: We have some former topics on US 6616402. Patent copy |
|
| Group: AirborneWindEnergy |
Message: 19804 |
From: joe_f_90032 |
Date: 3/9/2016 |
| Subject: Re: Long Loops |
Doug Selsam notes in topic:
The
problem with rope-drive in AWE is power is transmitted in proportion to
how hard the device tries to pull itself toward the ground. This
limits the fraction of available power that can be actually utilized,
similar to the recovery cycle of kite-reeling. You can't fool
Mother Nature! Nature loves torque-transmission, which is why she
invented the Multi-MegaWatt-powered top fuel
dragster! ~ Doug Selsam |
|
| Group: AirborneWindEnergy |
Message: 19805 |
From: joe_f_90032 |
Date: 3/9/2016 |
| Subject: Re: Long Loops |
Recall: See attachment drawing |
|
|
@@attachment@@
|
| Group: AirborneWindEnergy |
Message: 19806 |
From: dave santos |
Date: 3/9/2016 |
| Subject: Re: Open Tensegrity Shafts: Mechanical power transmission using ultr |
Rudy
Harburg's tensegrity/multi-rotor AWES patent is clear prior-art to the
"SuperTurbine" patent, and Rudy has granted an open developmental
license to anyone in our circle who wants to run with it (since the patent expires soon, and he made his fortune in Boulder, CO, real-estate).
On Wednesday, March 9, 2016 7:01 PM, "joefaust333@gmail.com [AirborneWindEnergy]" <AirborneWindEnergy@yahoogroups.com
On topic, Doug Selsam, notes:
My
first airborne wind energy patent U.S. 6616402, as well as all the
international versions, feature many examples of torque transmission
from multiple rotors to a ground station through elongate "tensegrity"
structures. All roads lead toSuperTurbine(R). :)
~Doug Selsam
=======================================
=== Moderator note: We have some former topics on US 6616402.
|
|
| Group: AirborneWindEnergy |
Message: 19807 |
From: dave santos |
Date: 3/9/2016 |
| Subject: Re: Long Loops |
Doug
overlooks that a power loop with high load-velocity will deliver
proportionally high power with modest tension. There are no known
torque drives in Nature or engineering that are as long as prime
upper-wind is high (
Doug Selsam notes in topic:
The
problem with rope-drive in AWE is power is transmitted in proportion to
how hard the device tries to pull itself toward the ground. This
limits the fraction of available power that can be actually utilized,
similar to the recovery cycle of kite-reeling. You can't fool
Mother Nature! Nature loves torque-transmission, which is why she
invented the Multi-MegaWatt-powered top fuel
dragster! ~ Doug Selsam
|
|
| Group: AirborneWindEnergy |
Message: 19808 |
From: dave santos |
Date: 3/9/2016 |
| Subject: Reminding how classic Rope-Driving informs non-torsional high-altitu |
Authoritative 121 year old engineering textbook masterpiece-
Deep modern appreciation by our pal, Kris de Decker, in Low-Tech Magazine-
Wanted: Comparable supporting literature for long-distance torsion drives.
|
|
| Group: AirborneWindEnergy |
Message: 19809 |
From: joe_f_90032 |
Date: 3/10/2016 |
| Subject: Re: Long Loops |
Join: AWES
|
| |
| AWES International
rapid AWES development (RAD) of airborne wind energy conversion systems
(AWES). Kite energy systems work to fulfill tasks or provide energy
for... |
| | | Preview by Yahoo |
| |
|
| Group: AirborneWindEnergy |
Message: 19810 |
From: joe_f_90032 |
Date: 3/10/2016 |
| Subject: Re: Long Loops |
Review sketch: Several thinkers are intimated. (Santos, Alexander Alexandrovich Bolonkin, Faust, Selsam, Ockles, and earlier inventors) Several loops in a system are hinted in sketch attached.
|
|
|
@@attachment@@
|
| Group: AirborneWindEnergy |
Message: 19811 |
From: joe_f_90032 |
Date: 3/10/2016 |
| Subject: Re: Long Loops |
|
Consider
and recall how main system tethers may host winged trams that drive
independent loops both in an up-going and then in down-going
drives. The loop is fixed to the tram. The loop is groundgen
anchored and aerially fixed at upper point. The tram rides up the main
tether and then reverses and drives down main tether. The groundgen
arrangement converts either direction to one-way driving of the
generator or pump. |
|
|
@@attachment@@
|
| Group: AirborneWindEnergy |
Message: 19812 |
From: dave santos |
Date: 3/10/2016 |
| Subject: Re: Long Loops [1 Attachment] |
Long-loop transmission is another AWES concept space that only KiteLab seems to have actually prototyped (KiteMotor1). There
was no excessive tension required, which is the sort of fact empirical
testing reveals, but arm-chair pessimism is helpless to ever confirm.
Working
tension of a cable-loop is just a similar practical trade-off to the
pumping return-cycle that all our standard reciprocating engines
employ. It really does not take much kite "rag" area to provide
adequate tension at low cost. Try it and see for yourself, rather than
guess.
On Thursday, March 10, 2016 7:27 AM, "joefaust333@gmail.com [AirborneWindEnergy]" <AirborneWindEnergy@yahoogroups.com
Review sketch: Several thinkers are intimated. (Santos, Alexander Alexandrovich Bolonkin, Faust, Selsam, Ockles, and earlier inventors) Several loops in a system are hinted in sketch attached.
|
|
| Group: AirborneWindEnergy |
Message: 19813 |
From: snapscan_snapscan |
Date: 3/10/2016 |
| Subject: Re: Open Tensegrity Shafts: Mechanical power transmission using ultr |
| Group: AirborneWindEnergy |
Message: 19814 |
From: snapscan_snapscan |
Date: 3/10/2016 |
| Subject: Re: Long Loops |
Thank you for reminding me of the
existence of rope drives and their application in long distance power
transfer. Personally I just hate them ever since I could not stop the
generator belt in my '85 Golf Diesel from slipping and squeaking
whenever it was cold and humid outside ;)
Kidding aside I was not making any statement about rope drives. When picking my design I simply looked at the AWE map
for an approach that looks promising on paper but has not been
researched yet to the point where a definitive judgement could be
made.
Is torsion better than other AWE
designs? Don't know - I will maybe find out and I will certainly learn
a lot in the process. Is a rope drive better? If you want to find
out you will have to test it yourself :)
/cb
---In airbornewindenergy@yahoogroups.com, <santos137@...
Doug Selsam notes in topic:
The
problem with rope-drive in AWE is power is transmitted in proportion to
how hard the device tries to pull itself toward the ground. This
limits the fraction of available power that can be actually utilized,
similar to the recovery cycle of kite-reeling. You can't fool
Mother Nature! Nature loves torque-transmission, which is why she
invented the Multi-MegaWatt-powered top fuel
dragster! ~ Doug Selsam |
|
| Group: AirborneWindEnergy |
Message: 19815 |
From: snapscan_snapscan |
Date: 3/10/2016 |
| Subject: Re: Open Tensegrity Shafts: Mechanical power transmission using ultr |
Thank you Dave and Doug - I have added both patents to the text. On a side note: I am into AWE for the fun, the kWh and the
bragging rights - not the dollars. When it comes to Airborne Wind
Energy there are way too many patents and way to few kWh :) If you
file for a patent chances are the only person getting richer is your
attorney. If you want bragging rights build something that can pass the someAWE challenges or feed some kWh into a grid ;)
Enjoy /cb
---In airbornewindenergy@yahoogroups.com, <santos137@...
On topic, Doug Selsam, notes:
My
first airborne wind energy patent U.S. 6616402, as well as all the
international versions, feature many examples of torque transmission
from multiple rotors to a ground station through elongate "tensegrity"
structures. All roads lead toSuperTurbine(R). :)
~Doug Selsam
=======================================
=== Moderator note: We have some former topics on US 6616402. |
|
| Group: AirborneWindEnergy |
Message: 19816 |
From: joe_f_90032 |
Date: 3/10/2016 |
| Subject: Re: wingboarding |
This corrects my attribution to hang gliding incident:
Doug Selsam notes importantly an incident in hang gliding:
Hanging from another pilot does not always work out... Hang Glider Falls to Her Death
|
| |
| Hang Glider Falls to Her Death Police
in B.C. are trying to figure out why a 27-year-old hang glider fell to
her death. The pilot has been criminally charged. »»» Subscribe to The
National... |
| | | Preview by Yahoo |
|
==================================================================
|
|
| Group: AirborneWindEnergy |
Message: 19817 |
From: joe_f_90032 |
Date: 3/10/2016 |
| Subject: Re: Long Loops |
Doug Selsam comments on topic:
======================================== dave santos stated:
Mar 9 9:20 PM "Doug overlooks that a power loop with high load-velocity will deliver proportionally high power with modest tension."
*** Doug replies:
actually I did not overlook that at all, and in fact I recognize that
tension is reduced in direct proportion to loop speed, as any engineer
would immediately note. There will be some upper limit to speed
though. Meanwhile, at any given speed, power can only be
transmitted to the ground in proportion to the extra lift required to
counter the working tension.
Here are two questions:
a)
IS the total tension twice (2x) what we assume, since the
upward-traveling half of the loop must be pulled up, while the
downward-traveling half also maybe has to be pulled down? Or might there at least be more total tension than we would assume from just the upward-pulling half?
b)
And does the tether (as a loop) have to weigh twice (2x) as much as it
otherwise would (as a non-loop)? Let's remember, tether weight
is a major impediment to high altitude deployment. Doubling
tether weight is no trivial effect.
==================
Dave Santos further states: "There are no known torque drives in Nature or engineering that are as long as prime upper-wind is high (
|
|
| Group: AirborneWindEnergy |
Message: 19818 |
From: joe_f_90032 |
Date: 3/10/2016 |
| Subject: Re: Long Loops |
Doug Selsam notes on topic: ========================== This
idea outlined by JoeF in this post amounts to a reversing,
push-me-pull-you version of a "laddermill" (or "tramway" as I
originally called it). I think we've heard this idea before, but
it would seem to be a step backward from laddermill, since the whole
idea of laddermill is to overcome the reversing cycle of a single kite
traveling up-and-down.
The
amazing thing about the laddermill concept is nobody has built and run
a decent versions sufficient to show viability or to weigh against
viability. Rather than develop the idea, by failing many times
but eventually getting it to work, the decision by all parties seems to
have been (likely with a nervous laugh) "That would be too hard, let's
just forget it and fly a kite and use it to pull the tether."
Disappointing,
but fair enough. But to then, to still call flying a single kite
a "Laddermill" seems beyond the pale to me. That is why AWE is
not moving forward very fast - nobody is exploring almost any of "the
thousand easy ways", but instead we just hear a lot of empty talk and
mission-creep, where statements of trying new ideas or powering remote
locations invariably fall flat, and a forest of promising concepts are
watered down to a boring snoozefest of redundant efforts. There
are a lot of people who SAY they are exploring AWE, but the amount of
new ideas actually being tried is not nearly what it should be, if
people were really serious about it, in my opinion.
~ Doug Selsam |
|
| Group: AirborneWindEnergy |
Message: 19819 |
From: joe_f_90032 |
Date: 3/10/2016 |
| Subject: Re: Long Loops |
Dave Santos Today at 7:54 AM : "Long-loop
transmission is another AWES concept space that only KiteLab seems to
have actually prototyped (KiteMotor1). There was no excessive tension
required, which is the sort of fact empirical testing reveals, but
arm-chair pessimism is helpless to ever confirm."
***DougS asks:
It would be instructive to know some numbers: How much power was
made, what was the tension, and what speed did the loop travel?
Can you provide a link or data that could answer these basic questions?
===================
Dave Santos continues:
"Working tension of a cable-loop is just a similar practical trade-off
to the pumping return-cycle that all our standard reciprocating engines
employ. It really does not take much kite "rag" area to provide
adequate tension at low cost. Try it and see for yourself, rather than
guess."
*** Doug S. notes: These questions
can be addressed using very straightforward, standard engineering
calculations such as torque x rotation rate = power. The basic
numbers are not mysterious in any way, though subtleties will certainly
modify the theoretical numbers somewhat. One factor seems
obvious: a loop would double the tether weight.
================================================ ================================================
|
|
| Group: AirborneWindEnergy |
Message: 19820 |
From: dave santos |
Date: 3/10/2016 |
| Subject: Re: Long Loops |
Thanks
to Doug for reminding me of my own researched example, so I can remind
him why it is not good news for torsional AWE- the traditional drilling
rig is in fact torsional, and long enough, but its massive, and its
shaft is supported by the massive earth itself to prevent hockling. Let
me therefore clarify that Nature and engineering seems to have no case
of unsupported long-distance low-mass torsion-transmission, as a
realistic predictor of AWE suitability.
The
power of KiteMotor1 flew at ~100ft, but only drove a hand cranked
generator of perhaps 5 watts. It was very a very small turbine carried
on my bike along with all my other nomadic gear when I migrated NW in
2007. I am sure it would drive a larger load, but the little charger
was all I had. The goal was only to be the first to make power with a
ground gen and a self-relaunching passively stable sled kite, no
autopilot, helium, or flygen. That Doug does not test these ideas
himself, nor call for ever better testing, leaves him stuck with years
of lamenting that the experiments of others do not meet his wishes.
On Thursday, March 10, 2016 4:16 PM, "joefaust333@gmail.com [AirborneWindEnergy]" <AirborneWindEnergy@yahoogroups.com
Dave Santos Today at 7:54 AM : "Long-loop
transmission is another AWES concept space that only KiteLab seems to
have actually prototyped (KiteMotor1). There was no excessive tension
required, which is the sort of fact empirical testing reveals, but
arm-chair pessimism is helpless to ever confirm."
***DougS asks:
It would be instructive to know some numbers: How much power was
made, what was the tension, and what speed did the loop travel?
Can you provide a link or data that could answer these basic questions?
===================
Dave Santos continues:
"Working tension of a cable-loop is just a similar practical trade-off
to the pumping return-cycle that all our standard reciprocating engines
employ. It really does not take much kite "rag" area to provide
adequate tension at low cost. Try it and see for yourself, rather than
guess."
*** Doug S. notes:
These questions can be addressed using very straightforward, standard
engineering calculations such as torque x rotation rate = power.
The basic numbers are not mysterious in any way, though subtleties will
certainly modify the theoretical numbers somewhat. One factor
seems obvious: a loop would double the tether weight.
================================================ ================================================
|
|
| Group: AirborneWindEnergy |
Message: 19821 |
From: dave santos |
Date: 3/10/2016 |
| Subject: Animation repurposed- Multiple Kite Units driving a CrossWind Cable |
The
lattice animation below appears on many Wikipedia physics pages. It
represents the common harmonic longitudinal modes of a one-dimensional
chain of particles excited at different levels. The phonon dynamics are
essentially similar from atomic scale to megascale models. These are
the exact optimal motions proposed for large ship-kites to tack back
and forth crosswind along a two-way loop, each in its own section,
grabbing the loop in either direction, for continuous rope-driving.
With regard to wind direction, the kite motions are powerful transverse
modes, consistent with both Loyd's Crosswind Power and
string-net-liquid theory [XG Wen]. This is a very pure elegant basis
for GW-scale kitefarms arrayed outside of a legacy power-plants
converted into kite-hybrid plants.
Open-AWE_IP-Cloud
if the animation is not working below, go to
|
|
| Group: AirborneWindEnergy |
Message: 19822 |
From: joe_f_90032 |
Date: 3/11/2016 |
| Subject: Gabion or Gabions |
Two parts:
1. Many times in our forum gabion and gabions have
been in focus for safety and for anchoring concerns. There has been a
habit of misspelling the noun. Search the matter
with the misspelling gambion or gambions. But be invited
to practice the correct spelling: gabion gabions
Gabion - Wikipedia, the free encyclopedia
2. Craft
meant to become a flight system may be anchored while the system is not
flying. Soft anchors, gabions, large environmental objects, ... may
anchor lines tied to strategic places on a flight system. Unexpected gust events could move a craft part into the head of some person, etc. to ruin otherwise good days.
|
|
| Group: AirborneWindEnergy |
Message: 19823 |
From: joe_f_90032 |
Date: 3/11/2016 |
| Subject: Re: Long Loops |
Joining: AWES
|
| |
| AWES International
rapid AWES development (RAD) of airborne wind energy conversion systems
(AWES). Kite energy systems work to fulfill tasks or provide energy
for... |
| | | Preview by Yahoo |
|
|
|
| Group: AirborneWindEnergy |
Message: 19824 |
From: joe_f_90032 |
Date: 3/11/2016 |
| Subject: Working Water Kite Systems |
We
have had many glances at tethered wings flying in water media. We've
saluted Minesto's progress in generating electricity from flygen's in
the water media. And there has been note that boat hulls anchored to
the seabed are water kiting. Ocean currents, waves, and tidal currents
may be mined for their kinetic energy by water-kite systems; the
captured energy may be used to perform good works. The body of good
works from water kiting is guessed to be much larger than yet
published. While that body of good works is expanded and
explored, we might record in this topic thread known water-kiting works
already noted in the literature.
Some notes: a. Many water kites are essentially kytoons. b. The water kite systems may anchor to seabed or to shoreline or to another water wing or to some aircraft. c. Some parts of a water-kite system might be partially or wholly in the air.
============================== 1. Fishing lures. (the lure is the wing of the kite system) 2. Positioning of trawlers' fishing nets. (wings are flown to open nets' mouths) 3. Staying the position of boats and ships. (the boat hulls or ship hulls are the wings) 4. Staying the position of booms that are worked to corral spills or trash. (the booms are the wings) 5.
Ground vehicles towing in-water hulls. (the hulls deflect kitingly to
stay centered in channels or to stay tacking in desired directions. 6. Transport air cabins by attaching air kite system (or air kytoon system) to its water-kited-wing anchor. 7. Transport persons via kiteboarding. (kite board is the water wing resisting its air-anchor wing) 8. ... (?) [[List of known water-kite works here is not complete. Anyone may add to the list.]]
And feel free to propose water kiting systems that are to do good works that seem not yet to be in the literature.
|
|
| Group: AirborneWindEnergy |
Message: 19825 |
From: dave santos |
Date: 3/11/2016 |
| Subject: Dr. Truchard of National Instruments visits kPower at SXSW |
Many
of top AWE teams use National Instruments' (NI) world-class scientific
instrumentation and automation products. The Austin company was founded
by the legendary Dr. Truchard, whose vision of scientific graphical
programming began at odds with macho coder culture, but scientists
intent on their research embraced the ease of use. I trained with NI
its early years, and have used and recommended the products off and on
over the decades. Dr.
Truchard ("Dr. T") took a strong interest in AWE years ago, and
facilitated NI to serve AWE R&D with generous pricing and strong
technical support. kPower used NI in its beginning prototype at
SouthWest Research Institute, but our Low-Complexity AWE space really
has not needed much instrumentation until lately, as UTexas AE has
designated kPower to be its "industry partner" kite flyer for
scientific kite research, so it was time to get back in the NI swim.
It
was therefore a thrill to see Dr. T himself walk up to the kPower SXSW
booth, and hear his interest in AWE continues. He referred us to his
SXSW team, who took special care to listen to our current application
needs, which center on machine vision videogrammetry to gather bulk
kite data. We got the latest machine-vision documentation binder and
also discussed NI's ongoing android smart phone integration, which
currently only exists using the phone as the graphical interface, with
NI's hardware on a dongle, but the app suite is soon to be integrated
into the phone's own processing, for a powerful handheld field
capability.
 y |
|
| Group: AirborneWindEnergy |
Message: 19826 |
From: dave santos |
Date: 3/11/2016 |
| Subject: NI Machine Vision for Kite Farms |
Recall
the NI-based NASA LaRC student team machine vision AWES a few years
ago. For the same reasons as ground-based actuation, it makes good
sense for automated kite farms to use ground-based remote-sensing.
Compare the bother and risk of sensors aloft, including power and
comm-link dependencies. Machine vision is rich, and if the multi-camera
set, kite and line, conspicuity markings, working spectrum, lighting,
and so on, is carefully chosen, will be robust in almost all conditions
of sun and weather (only a fully structured environment is truly
reliable). Radar would serve for intrusion detection, and system-state,
using reflectors aloft, but the FAA wants the least radar clutter, so
our kites will likely stay radar transparent, with ADS-B as the
positive AWES airspace locating basis. Thus the custom NI visual system
would have a standard avionic back-up, but still provide the richest
view possible of the system state, and there would still be a
Pilot-in-Command and Visual-Observer supervising. Sense-and-avoid might
be automated, with PIC and VO controlling the often tricky system
recovery decision Fort Felker posed.
Here is another vision case, with links to other aspects of NI solutions, to go a bit deeper into the methods-
|
|
| |
