• drag
• destabilizing
• tail fin
• point of attachment
• laddermill
• pumping mill of single tether
• ratio of produced power to installed kite-system AWE power
• lifting bodies ....wings, balloons, kytoons, kites, flying sails, LTA blimps,
• conventional windmills
• ASSET  AeroSpace Sustainable Engineering and Technology of the Faculty of Aerospace Engineering of Delft University of Technology
• Notice that on the first concept of the ASSET laddermill, the ascending kites are vulnerable to the shadow of the descending kites; guiding the the descending kites to the side would tend to reduce the shadow effect. I did not see this matter discussed in an early article.
• gravity forces on parts of AWES
• AWES   airborne wind energy system
• wind profile
• KiteLab had two sections: 1. Monitoring and preparation
• 2. Flight test section
• auxiliary launch towers
• safe altitude
• wind vane
• slack
• symmetric flight
• beach testing
• active control
• type of wing
• pitch control
• ailerons
• rudder
• elevator
• crosswind motions
• mass of tether
• tether mass
• ground station
• high L/D
• aerodynamic efficiency
• What is behind their statement: "Only at altitude the wing becomes less stagle. At low altitude the longitutdinal motion of the wing approimates a pitching rotation about the point of attachment of the wing to the main tether. The horizontal stabilizer counters this rotation. As altitude increases, so does the force the teher exerts onthe wing. This increase has a destabilizing effect."   WHAT IF each wing is set with its own kite line off a main kite line???
• divergence
• escalating oscillation
• continuous divergence
• KitEye project (target: altitude record of single kite on single tether)
• Eperan-PP foam with glass- and carbon fiber reinforcements and has awing span of 3 m, a wing surface of 0.75 m2 and a weight of 880 grams.
• unstable motions
• unstable reversed pendulum motion,
• slight dutch roll instability.
• pilot kite
• In the test kite:  Furthermore, the use of carbon
  fiber as a reinforcement material has been proven
  unsatisfactory due to the fact that carbon-fiber
  composite is quite brittle and will fail under
  sudden shock loads.
• Later versions of this kite will be larger and will
  consist of fabric and inflatable envelopes
  providing sufficient rigidity. To predict the
  behaviour of such a flexible structure, a theory is
  being devised. This theory will be based on
  fluid-structure interaction coupled with a
  numerical approach to flight stability; much like
  was done in the simulation program outlined in
  section 4.
• control authority in yaw
• control authority in pitch
• inherently stable wings
• longitudinally stable
• course corrections
• yaw-control input
• Roll control is a degree of freedom which tethered wings do not have due to the bridle lines attached to the wings.
• Article imprint creation date 11/4/2004 ...not sure of the month of 11 or of 4
• advantages and disadvantages in each of the two methods

[1] Ockels, W.J., 2001, "Laddermill, a novel concept to exploit the energy in the airspace", Aircraft design 4 (2001), pp 81-97.

[2] Royal Netherlands Meteorological Institute.

[3] EWEA, 2003, "Wind energy – The facts".

[4] Dutch Ministry of economic affairs, 2001, "Bestuursovereenkomst Landelijke Ontwikkeling  Windenergie (Blow)", accessible at
http://apps.ez.nl/publicaties/pdfs/blow-bw1.pdf
, accessed 3-11-2004.

[5] Statistics Netherlands (Centraal Bureau voor de Statistiek), 2003, "Duurzame energie in Nederland", http://www.cbs.nl/nl/publicaties/publicaties/bedri 
jfsleven/energie-water/duurzame-energie-innederland-2003.pdf
, accessed 3-11-2004.

[6] Kan, J. van, 2000, Numerice wiskunde voor technici, Universiteitspers.

[7] Loyd, M.L., 1980, "Crosswind Kite Power", Journal of Energy, vol. 4, No. 3, pp 106-111.

Lake kite generator

Mobile kite generator

http://www.win.tue.nl/casa/meetings/special/ecmi08/pumping-kite.pdf  Mathematical Modeling of the Pumping Kite Wind Generator:
Optimization of the Power Output 
October 31, 2008

Tampere University of Technology, Finland

===================================

constraints

laws

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[10] B. W. Roberts, D. H. Shepard, K. Caldeira, M. E. Cannon, D. G. Eccles, A. J. Grenier,

J. F. Freidin, Harnessing High-Altitude Wind Power, IEEE Transaction on Energy Con-version, 2007, 22, No. 1. P. 136{144.

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No. US 6,254,034, Jul. 2001.

[12] Chen, Wai-Fah, Handbook of Structural Engineering. Boca Raton: CRC Press, 1997.

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