: gold open access, : green open access

2019

V. Salma, F. Friedl, R. Schmehl: "Improving Reliability and Safety of Airborne Wind Energy Systems". Wind Energy, in production, 2019. doi:10.1002/we.2433. pdf

N. Krishnan, A. Viré, R. Schmehl, G. van Bussel, "An immersed boundary method based on domain decomposition". Computers & Fluids, under review, 2019.

A.A. Candade, M. Ranneberg, R. Schmehl: "Structural Analysis and Optimization of a Tethered Swept Wing for Airborne Wind Energy Generation". Wind Energy, under review, 2019.

S. Watson et al: "Future emerging technologies in the wind power sector: a European perspective". Renewable and Sustainable Energy Reviews, Vol. 113, pp. 109270, 2019. doi:10.1016/j.rser.2019.109270.

F. Bauer, D. Petzold, R.M. Kennel, F. Campagnolo, R. Schmehl: "Control of a Drag Power Kite over the Entire Wind Speed Range". AIAA Journal of Guidance, Control and Dynamics, Vol. 42, No. 10, pp. 2167-2182, 2019. doi:10.2514/1.G004207. pdf

S. Rapp, R. Schmehl, E. Oland, T. Haas: "Cascaded Pumping Cycle Control for Rigid Wing Airborne Wind Energy Systems". AIAA Journal of Guidance, Control and Dynamics, pp. 1-18, 2019. doi:10.2514/1.G004246. pdf

P. Bechtle, M. Schelbergen, R. Schmehl, U. Zillmann, S.J. Watson: "Airborne wind energy resource analysis". Renewable Energy, Vol. 141, pp. 1103-1116, 2019. doi:10.1016/j.renene.2019.03.118.

R. van der Vlugt, A. Bley, M. Noom, R. Schmehl: "Quasi-Steady Model of a Pumping Kite Power System". Renewable Energy, Vol. 131, pp. 83-99, 2019. doi:10.1016/j.renene.2018.07.023.

M.A.M. Folkersma, R. Schmehl, A. Viré: "Boundary layer transition modeling on leading edge inflatable kite airfoils". Wind Energy, Vol. 22, No. 7, pp. 908-921, 2019. doi:10.1002/we.2329.

P. Thedens, G. de Oliveira, R. Schmehl: "Ram‐air kite airfoil and reinforcements optimization for airborne wind energy applications". Wind Energy, Vol. 22, No. 5, pp. 653-665, 2019. doi:10.1002/we.2313.

J. Hummel, D. Göhlich, R. Schmehl: "Automatic measurement and characterization of the dynamic properties of tethered membrane wings". Wind Energy Science, Vol. 4, pp. 41-55, 2019. doi:10.5194/wes-4-41-2019.

J. Oehler, R. Schmehl: "Aerodynamic characterization of a soft kite by in situ flow measurement". Wind Energy Science, Vol. 4, pp. 1-21, 2019. doi:10.5194/wes-4-1-2019.

G. Sánchez-Arriaga, A. Pastor-Rodríguez, M. Sanjurjo-Rivo, R. Schmehl: "A lagrangian flight simulator for airborne wind energy systems". Applied Mathematical Modelling, Vol. 69, pp. 665-684, 2019. doi:10.1016/j.apm.2018.12.016. pdf

S. Rapp, R. Schmehl, E. Oland, S. Smidt, T. Haas, J. Meyers: "A Modular Control Architecture for Airborne Wind Energy Systems". AIAA 2019-1419, AIAA Scitech 2019 Forum, San Diego, CA, 7-11 January 2019. doi:10.2514/6.2019-1419. pdf

2018

F. Bauer, R. M. Kennel, C. M. Hackl, F. Campagnolo, M. Patt, R. Schmehl: "Drag power kite with very high lift coefficient". Renewable Energy, Vol. 118, pp. 290-305, 2018. doi:10.1016/j.renene.2017.10.073. pdf

R. Schmehl, M. Schelbergen, P. Bechtle, U. Zillmann, S.J. Watson: "ERA5 reanalysis data for Airborne Wind Energy Resource Analysis". 4TU.Centre for Research Data, Dataset, 2018. doi:10.4121/uuid:646eaf3f-c90b-4f22-89bf-8986804def3c.

R. Borobia-Moreno, G. Sánchez-Arriaga, A. Serino, R. Schmehl: "Flight-Path Reconstruction and Flight Test of Four-Line Power Kites". AIAA Journal of Guidance, Control and Dynamics, Vol. 41, No. 12, pp. 2604-2614, 2018. doi:10.2514/1.G003581. pdf

M. Schelbergen, R. Schmehl: “Optimal Operation and Power Curve Estimation of a Pumping Airborne Wind Energy System”. 14th EAWE PhD Seminar on Wind Energy, Vrije Universiteit Brussel, Belgium, 18-20 September 2018. pdf

S. Rapp, R. Schmehl: "Vertical Takeoff and Landing of Flexible Wing Kite Power Systems". AIAA Journal of Guidance, Control and Dynamics, Vol. 41, No. 11, pp. 2386-2400, 2018. doi:10.2514/1.G003535. pdf

J. Wijnja, R. Schmehl, R. De Breuker, K. Jensen, D. Vander Lind: "Aeroelastic Analysis of a Large Airborne Wind Turbine". AIAA Journal of Guidance, Control and Dynamics, Vol. 41, No. 11, pp. 2374-2385, 2018. doi:10.2514/1.G001663. pdf

V. Salma, R. Ruiterkamp, M. Kruijff, M.M. van Paassen, R. Schmehl: "Current and Expected Airspace Regulations for Airborne Wind Energy Systems". In: R. Schmehl (ed.) "Airborne Wind Energy - Advances in Technology Development and Research", Springer Nature, Singapore, pp. 703-725, 2018. doi:10.1007/978-981-10-1947-0_29. pdf

P. Benhaïem, R. Schmehl: "Airborne Wind Energy Conversion Using a Rotating Reel System". In: R. Schmehl (ed.) "Airborne Wind Energy - Advances in Technology Development and Research", Springer Nature, Singapore, pp. 539-577, 2018. doi:10.1007/978-981-10-1947-0_22. pdf

P. Faggiani, R. Schmehl: "Design and Economics of a Pumping Kite Wind Park". In: R. Schmehl (ed.) "Airborne Wind Energy - Advances in Technology Development and Research", Springer Nature, Singapore, pp. 391-411, 2018. doi:10.1007/978-981-10-1947-0_16. pdf

U. Fechner, R. Schmehl: "Flight Path Planning in a Turbulent Wind Environment". In: R. Schmehl (ed.) "Airborne Wind Energy - Advances in Technology Development and Research", Springer Nature, Singapore, pp. 361-390, 2018. doi:10.1007/978-981-10-1947-0_15. pdf

R. Schmehl (ed.): "Airborne Wind Energy - Advances in Technology Development and Research". Springer Nature, Singapore, 752 pages, 2018. doi:10.1007/978-981-10-1947-0.

T. N. Dief, U. Fechner, R. Schmehl, S. Yoshida, A. M. M. Ismaiel, A. M. Halawa: "System identification, fuzzy control and simulation of a kite power system with fixed tether length". Wind Energy Science, Vol. 3, pp. 275-291, 2018. doi:10.5194/wes-2017-26.

M.A.M. Folkersma, P. Thedens, R. Schmehl: "Fluid-Structure Interaction of Inflatable Wing Section". 13th OpenFOAM Workshop (OFW13), Shanghai, China, 24-29 June 2018. pdf

J. Oehler, M. van Reijen, R. Schmehl: "Experimental investigation of soft kite performance during turning maneuvers". Journal of Physics Conference Series, Vol. 1037, pp. 052004, 2018. doi:10.1088/1742-6596/1037/5/052004.

G. Sánchez-Arriaga, A. Pastor-Rodríguez, R. Borobia-Moreno, R. Schmehl: "A constraint-free flight simulator package for airborne wind energy systems". Journal of Physics Conference Series, Vol. 1037, pp. 062018, 2018. doi:10.1088/1742-6596/1037/6/062018.

2017

M. Diehl, R. Leuthold, R. Schmehl: "The International Airborne Wind Energy Conference 2017: Book of Abstracts". University of Freiburg, 192 pages, 5-6 October 2017. doi:10.6094/UNIFR/12994.

H. Bier, R. Schmehl, S. Mostafavi, A. Anton S. Bodea: "Kite-Powered Design-to-Robotic-Production for Affordable Building on Demand". Proceedings of the 34th International Symposium on Automation and Robotics in Construction (ISARC2017), pp. 566-570, Taipei, Taiwan, 28 June - 1 July 2017. doi:10.22260/ISARC2017/0078.

G. Sánchez-Arriaga, M. García-Villalba, R. Schmehl: "Modelling and dynamics of a two-line kite". Applied Mathematical Modelling, Vol. 47, pp. 473-486, 2017. doi:10.1016/j.apm.2017.03.030. pdf

2016

P. S Manoj: "Airborne wind energy technology - Potential alternative for clean energy". Atlantis Magazine, Vol. 27, Issue 1, 2016. pdf

U. Fechner, R. Schmehl: "Downscaling of Airborne Wind Energy Systems". Journal of Physics: Conference Series Vol. 753, pp. 102002, 2016. doi:10.1088/1742-6596/753/10/102002.

U. Fechner: "A Methodology for the Design of Kite-Power Control Systems". PhD thesis, Delft University of Technology, 2016. doi:10.4233/uuid:85efaf4c-9dce-4111-bc91-7171b9da4b77.

U. Fechner, R. Schmehl: "Flight Path Control of Kite Power Systems in a Turbulent Wind Environment". 2016 American Control Conference (ACC), pp. 4083-4088, Boston, MA, USA, 6-8 July 2016. doi:10.1109/ACC.2016.7525563. pdf

2015

R. Schmehl: "The International Airborne Wind Energy Conference 2015: Book of Abstracts". Delft University of Technology, 123 pages, 15-16 June 2015. doi:10.4233/uuid:7df59b79-2c6b-4e30-bd58-8454f493bb09.

U. Fechner, R. van der Vlugt, E. Schreuder, R. Schmehl: "Dynamic Model of a Pumping Kite Power System". Renewable Energy, Vol. 83, pp. 705-716, 2015. doi:10.1016/j.renene.2015.04.028. pdf

A. Viré, R. Schmehl: "How to harness wind energy with traction kites". Reviews in Environmental Science and Bio/Technology, Vol. 14, No. 1, pp. 1-4, 2015. doi:10.1007/s11157-014-9360-4. pdf

F. Friedl, L. Braun, R. Schmehl, M. Stripf: "Fault-Tolerant and Reliable Design of a Pumping Kite Power System". In: Energy, Science & Technology Conference 2015, Karlsruhe, Germany, p. 101, 20-22 May 2015. doi:10.5445/IR/1000044290. pdf

2014

R. Schmehl, R. van der Vlugt, U. Fechner, A. de Wachter, W. Ockels: "Airborne Wind Energy System". Dutch Patent Application NL 2009528. pp. 1-34, 2014. pdf

C. Grete: “The Economic Potential of Kite Power”. Leonardo Times - Journal of the Society of Aerospace Engineering Students 'Leonardo da Vinci', No. 4, pp. 10-11, 2014. pdf

U, Fechner, R. Schmehl: "Feed-Forward Control of Kite Power Systems". Journal of Physics: Conference Series Vol. 524, pp. 012081, 2014. doi:10.1088/1742-6596/524/1/012081.

A. Bosch, R. Schmehl, P. Tiso, D. Rixen: “Dynamic nonlinear aeroelastic model of a kite for power generation“. AIAA Journal of Guidance, Control and Dynamics, Vol. 37, No. 5, pp. 1426-1436, 2014. doi:10.2514/1.G000545. pdf

C. Jehle, R. Schmehl: "Applied Tracking Control for Kite Power Systems". AIAA Journal of Guidance, Control and Dynamics, Vol. 37, No. 4, pp. 1211-1222, 2014. doi:10.2514/1.62380. pdf

2013

A. Bosch, R. Schmehl, P. Tiso, D. Rixen: “Nonlinear Aeroelasticity, Flight Dynamics and Control of a Flexible Membrane Traction Kite". In: U. Ahrens, M. Diehl, R. Schmehl (eds.) "Airborne Wind Energy". Springer, Berlin Heidelberg, 2013. doi:10.1007/978-3-642-39965-7_17. pdf

J. Breukels, R. Schmehl, W.J. Ockels: "Aeroelastic Simulation of Flexible Membrane Wings based on Multibody System Dynamics". In: U. Ahrens, M. Diehl, R. Schmehl (eds.) "Airborne Wind Energy". Springer, Berlin Heidelberg, 2013. doi:10.1007/978-3-642-39965-7_16. pdf

U. Fechner, R. Schmehl: "Model-Based Efficiency Analysis of Wind Power Conversion by a Pumping Kite Power System". In: U. Ahrens, M. Diehl, R. Schmehl (eds.) "Airborne Wind Energy". Springer, Berlin Heidelberg, 2013. doi:10.1007/978-3-642-39965-7_14. pdf

R. Schmehl, M. Noom, R. van der Vlugt: "Traction Power Generation with Tethered Wings". In: U. Ahrens, M. Diehl, R. Schmehl (eds.) "Airborne Wind Energy". Springer, Berlin Heidelberg, 2013. doi:10.1007/978-3-642-39965-7_2. pdf

R. van der Vlugt, J. Peschel, R. Schmehl: "Design and Experimental Characterization of a Pumping Kite Power System". In: U. Ahrens, M. Diehl, R. Schmehl (eds.) "Airborne Wind Energy". Springer, Berlin Heidelberg, 2013. doi:10.1007/978-3-642-39965-7_23. pdf

U. Ahrens, M. Diehl, R. Schmehl (eds.): "Airborne Wind Energy". Springer, Berlin Heidelberg, 611 pages, 2013. doi:10.1007/978-3-642-39965-7.

2012

U. Fechner, R. Schmehl: “Design of a Distributed Kite Power Control System”. 2012 IEEE Multi-Conference on Systems and Control, Dubrovnik, Croatia, 3-5 October 2012. pdf

U. Fechner, R. Schmehl: “High level control and optimization of kite power systems”. 8th PhD Seminar on Wind Energy in Europe, Zurich, Switzerland, 12-13 September 2012. pdf

R. Schmehl: “Kiting for Wind Power”. Wind Systems, No. 7, pp. 36-43, 2012. pdf

R. Schmehl: “Large-Scale Power Generation with Kites”. Leonardo Times - Journal of the Society of Aerospace Engineering Students 'Leonardo da Vinci', No. 1, pp. 21-22, 2012. pdf

J.H. Baayen, W.J. Ockels: "Tracking control with adaption of kites". IET Control Theory & Applications. Vol. 6, No. 2, pp. 182191, 2012. doi:10.1049/iet-cta.2011.0037.

2011

S.G.C. de Groot, J. Breukels, R. Schmehl, W.J. Ockels: “Modeling Kite Flight Dynamics Using a Multibody Reduction Approach”. AIAA Journal of Guidance, Control and Dynamics. Vol. 34, No. 6, pp. 1671-1682, 2011. doi:10.2514/1.52686.

R. Schmehl: "Die Kraft des Drachens, Antwort auf Leserbrief". Erneuerbare Energien, No. 9, p. 133, 2011. pdf

R. Schmehl: "Die Kraft des Drachens". Erneuerbare Energien, No. 8, p. 64-69, 2011. pdf

R. Schmehl: "Kite Power Technologie". Windnieuws, No. 2, pp. 22-24, 2011. pdf

E.J. Terink, J. Breukels, R. Schmehl, W.J. Ockels: “Flight Dynamics and Stability of a Tethered Inflatable Kiteplane”. AIAA Journal of Aircraft, Vol. 48, No. 2, pp. 503-513, 2011. doi:10.2514/1.C031108. pdf

J. Breukels: "An engineering methodology for kite design". PhD thesis, Delft University of Technology, 2011. pdf

2010

E.J. Terink, R.F. Verheul: "Kiteplane Handbook - User guide for Kiteplane design, construction, modeling, simulation, operation and testing". Technical Report, TU Delft, August 2010. pdf

A. de Wachter: "Power from the skies - Laddermill takes Airborne Wind Energy to new heights". Leonardo Times - Journal of the Society of Aerospace Engineering Students 'Leonardo da Vinci', No. 4, pp. 18-20, 2010. pdf

J. Breukels, W.J. Ockels: "A Multi-Body System Approach to the Simulation of Flexible Membrane Airfoils". Aerotecnica Missili & Spazio (AIDAA), Vol. 89, No. 3, pp. 119-134, 2010. pdf

2009

R.F. Verheul, J. Breukels, W.J. Ockels: “Material selection and joining methods for the purpose of a high-altitude inflatable kite”. AIAA 2009-2338, 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Palm Springs, CA, USA, 4-5 May 2009. pdf

2008

P. Williams, B. Lansdorp, W.J. Ockels: “Optimal Crosswind Towing and Power Generation with Tethered Kites”. AIAA Journal of Guidance, Control and Dynamics, Vol. 31, No. 1, 2008. doi:10.2514/1.30089.

J. Breukels, W.J. Ockels: "Analysis of complex inflatable structures using a multi-body dynamics approach". AIAA-2008-2284, 49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Schaumburg, IL, USA, 7-10 April 2008. pdf

P. Williams, B. Lansdorp, W.J. Ockels: “Nonlinear Control and Estimation of a Tethered Kite in Changing Wind Conditions”, AIAA Journal of Guidance, Control and Dynamics, Vol. 31, No. 3, 2008. doi:10.2514/1.31604.

B. Lansdorp, R. Ruiterkamp, P. Williams, W.J. Ockels: "Long-Term Laddermill Modeling for Site Selection". AIAA-2008-6690, AIAA Modeling and Simulation Technologies Conference and Exhibit, Honolulu, Hawaii, 18-21 August 2008. pdf

P. Williams, B. Lansdorp, W.J. Ockels: “Modeling, Simulation, and Testing of Surf Kites for Power Generation”. AIAA 2008-6693, AIAA Modelling and Simulation Technologies Conference and Exhibit, Honolulu, Hawaii, USA, 18-21 August 2008. pdf

P. Williams, B. Lansdorp, W.J. Ockels: “Modeling of Optimal Power Generation using Multiple Kites". AIAA 2008-6691, AIAA Modelling and Simulation Technologies Conference and Exhibit, Honolulu, Hawaii, USA, 18-21 August 2008. pdf

2007

A.R. Podgaets, W.J. Ockels: "Laddermill sail - a new concept in sailing". International Conference on Engineering Technology (ICET 2007), Kuala Lumpur, Malaysia, 11-14 December 2007. pdf

A.R. Podgaets, W.J. Ockels: "Robust Control of Laddermill Wind Energy System". Wind Power Shanghai Conference, Shanghai, China, 1-3 November 2007. pdf

A.R. Podgaets, W.J. Ockels: "Comparison of two mathematical models of the kite for Laddermill sail simulation". IAENG World Congress of Engineering Computer Science, San Francisco, CA, USA, 24-26 October 2007. pdf

A.R. Podgaets, W.J. Ockels: "Flight Control of the High Altitude Wind Power System". 7th Conference on Sustainable Applications for Tropical Island States, Cape Canaveral, FL, USA, 3-6 June 2007. pdf

J. Breukels, W.J. Ockels: "A multi-body dynamics approach to a cable simulation for kites". Asian Modelling and Simulation (AsiaMS2007), Beijing, China, 8-10 October 2007. pdf

B. Lansdorp, W.J. Ockels: "Design and construction of the 4kW groundstation for the laddermill". 7th IASTED International Conference on Power and Energy Systems (EuroPES 2007), Palma de Mallorca, Spain, 29-31 August 2007. pdf

P. Williams, B. Lansdorp, W.J. Ockels: "Modeling and Control of a Kite on a Variable Length Flexible Inelastic Tether". AIAA 2007-6705, AIAA Modelling and Simulation Technologies Conference and Exhibit, Hilton Head, SC, USA, 20-23 August 2007. pdf

P. Williams, B. Lansdorp, W.J. Ockels: "Optimal Trajectories for Tethered Kite Mounted on a Vertical Axis Generator". AIAA 2007-6706, AIAA Modelling and Simulation Technologies Conference and Exhibit, Hilton Head, SC, USA, 20-23 August 2007. pdf

P. Williams, B. Lansdorp, W.J. Ockels: “Flexible Tethered Kite with Movable Attachment Points, Part II: State and Wind Estimation”. AIAA-2007-6629, AIAA Modelling and Simulation Technologies Conference and Exhibit, Hilton Head, SC, USA, 20-23 August 2007. pdf

P. Williams, B. Lansdorp, W.J. Ockels: “Flexible Tethered Kite with Movable Attachment Points, Part I: Dynamics and Control”. AIAA-2007-6628, AIAA Modelling and Simulation Technologies Conference and Exhibit, Hilton Head, SC, USA, 20-23 August 2007. pdf

B. Lansdorp, R. Ruiterkamp, W.J. Ockels: “Towards Flight Testing of Remotely Controlled Surfkites for Wind Energy Generation”. AIAA-2007-6643, AIAA Modelling and Simulation Technologies Conference and Exhibit, Hilton Head, SC, USA, 20-23 August 2007. pdf

J. Breukels, W.J. Ockels: "Numerical and Experimental Results of the Airflow in the Delft University KiteLab". AIAA 2007-3922, 25th AIAA Applied Aerodynamics Conference, Miami, FL, USA, 25-28 June 2007. pdf

J. Breukels, W.J. Ockels: "Design of a large inflatable kiteplane". AIAA 2007-2246, 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, HI, USA, 23-26 April 2007. pdf

J. Breuer, W.J. Ockels, R.H. Luchsinger: "An inflatable wing using the principle of Tensairity". AIAA 2007-2117, 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, HI, USA, 23-26 April 2007. pdf

A.R. Podgaets, W.J. Ockels: "Stability of Optimal Solutions: Multi- and Single-Objective Approaches". 1st IEEE Symposium on Computational Intelligence in Multicriteria Decision Making (MCDM 2007), Honolulu, HI, USA, 1-5 April 2007. pdf

J. Breukels, W.J. Ockels: “Past, present and future of kites and energy generation”. Power and Energy Systems Conference 2007, Clearwater, FL, USA, 3-5 January 2007. pdf

2006

A.R. Podgaets, W.J. Ockels: "Flight control and stability of a multiple kites tethered system".Renewable Energy 2006, Makuhari Messe, Chiba, Japan, 9-13 October 2006. pdf

W.J. Ockels, R. Ruiterkamp, B. Lansdorp: "Ship propulsion by Kites combining energy production by Laddermill principle and direct kite propulsion". Kite Sailing Symposium, Center for Wooden Boats/South Lake Union, Seattle, WA, 28-30 September 2006. pdf

B. Lansdorp, P. Williams: "The Laddermill - Innovative Wind Energy from High Altitudes in Holland and Australia". Global Windpower 2006, Adelaide, Australia, 18-21 September 2006. pdf

A.R. Podgaets, W.J.Ockels: "Problem of Pareto-Optimal Control for a High Altitude Energy System". 9th World Renewable Energy Congress (WREC IX), Florence, Italy, 19-25 August 2006. pdf

A.R. Podgaets, W.J.Ockels: "Three-dimensional simulation of a Laddermill". 3rd Asian Wind Power Conference (WindPowerAsia2006), Beijing, China, 28-30 June, 2006. pdf

B. Lansdorp, W.J. Ockels: "Design and construction of a 2 kW Laddermill groundstation". Wind Power Asia 2006, Beijing, China, 28-30 June 2006.

2005

J. Breukels: "ASSET and the world of kites". Leonardo Times - Journal of the Society of Aerospace Engineering Students 'Leonardo da Vinci', No. 4, pp. 12-13, 2005. pdf

J. Breukels, W.J. Ockels: "Tethered kiteplane design for the Laddermill project". 4th World Wind Energy Conference & Renewable Energy Exhibition 2005, Melbourne, Australia, 2-5 November 2005. pdf

B. Lansdorp, B. Remes, W.J. Ockels: "Design and testing of a remotely controlled surfkite for the Laddermill". 4th World Wind Energy Conference & Renewable Energy Exhibition 2005, Melbourne, Australia, 2-5 November 2005. pdf

B. Lansdorp, W.J. Ockels: "Design of a 100 MW laddermill for wind energy generation from 5 km altitude", 7th World Congress on Recovery, Recycling and Re-Integration, Peking, China, 25-29 September 2005. pdf

B. Lansdorp, W.J. Ockels: "Comparison of concepts for high-altitude wind energy generation with ground based generator". 2nd China International Renewable Energy Equipment & Technology Exhibition and Conference, Beijing, China, 25-27 May 2005. pdf

2004

W.J. Ockels, B. Lansdorp, J. Breukels, G. Spierenburg: "The Laddermill: work in progress". European Wind Energy Conference & Exhibition, London, UK, 22-25 November 2004. pdf

2002

S.L. Veldman, C.A.J.R. Vermeeren, H.E.N. Bersee, O.K. Bergsma: "Conceptual Design of a High Altitude Kite". 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Denver, CO, USA, 22-25 April 2002. doi:10.2514/6.2002-1735.

2001

W.J. Ockels: "Laddermill, a novel concept to exploit the energy in the airspace". Aircraft Design, Vol. 4, No. 2-3, pp. 81-97, 2001. doi:10.1016/S1369-8869(01)00002-7.

1999

J.P. Meijaard, W.J. Ockels, A.L. Schwab: "Modelling of the dynamic behaviour of a laddermill, a novel concept to exploit wind energy". 3rd International Symposium on Cable Dynamics, Trondheim, Norway, pp.229-234, 16-18 August 1999. pdf