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Lansdorp, B. (author), Ruiterkamp, R. (author), Ockels, W. (author)
Non-powered flight vehicles such as kites can provide a means of transmitting wind energy from higher altitudes to the ground via tethers. Although there is increased world wide interest for systems to extract wind energy from higher altitudes with kites, research into kite properties such as the coefficients and the stability is limited. Such...
conference paper 2007
document
Breukels, J. (author), Ockels, W.J. (author)
conference paper 2007
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Williams, P. (author), Lansdorp, B. (author), Ockels, W. (author)
Tethered kite technology is one potential means of harnessing energy available in high altitude winds. In an efficient and practical system, the kite is required to fly in cyclic patterns that maximize net power produced per cycle. At the same time, the tether length must be controlled to ensure the system does not expend more energy than it...
conference paper 2007
document
Williams, P. (author), Lansdorp, B. (author), Ockels, W. (author)
Tethered kite technology promises the enable the efficient extraction of energy from high altitude winds. One possible concept for converting the wind energy into electricity is to generate useful work at the ground by using a tether. The tether is able to drive a generator in one of two ways: either the tether is wound and unwound, or the...
conference paper 2007
document
Williams, P. (author), Lansdorp, B. (author), Ockels, W. (author)
conference paper 2007
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Antonelli, V. (author), Terzi, A. (author), Ockels, W. (author), Beukers, A. (author)
The present paper presents the structural design of the Superbus. First the overall requirements are described and analyzed, with respect to loads (static and dynamic), stiffness and functional requirements. In order to fulfil the relative targets, two different solutions have been defined and analyzed in the preliminary design. From those, the...
conference paper 2007
document
Williams, P. (author), Lansdorp, B. (author), Ockels, W. (author)
conference paper 2007
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Ockels, W.J. (author)
From his personal experience during a space flight (Challenger 1985) onward, the author has been struck repeatedly by the remarkable influence of Earth's environment on life, in particular by its most inevitable elements: time and gravity. Our life might be peculiar to the local Earth conditions, and not cosmic per se.
conference paper 2007
document
Breukels, J. (author), Ockels, W.J. (author)
conference paper 2007
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Podgaets, A.R. (author), Ockels, W.J. (author)
conference paper 2006
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Lansdorp, B. (author), Ockels, W.J. (author), Ruiterkamp, R. (author)
conference paper 2006
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Podgaets, A.R. (author), Ockels, W.J. (author)
conference paper 2006
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Podgaets, A.R. (author), Ockels, W.J. (author)
One of novel concepts to use the energy of high altitude winds is by launching a series of kite on a long rope and let them pull the rope thus driving the generator. A mathematical model of tethered kites system has been developed consisting of models of kites and of the cable that links them together and to the generator on the ground energy...
conference paper 2006
document
Breukels, J. (author), Ockels, W. (author)
The Laddermill is an innovative concept for generating energy from wind using large kite-like wings on a tether. The wings are able to fly in both the regime of airplanes and kites. We therefore call these structures "kiteplanes". By providing a recurring motion with a large lift during ascending and a lower lift during descending, energy can be...
conference paper 2005
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Ockels, W.J. (author), Lansdorp, B. (author)
conference paper 2005
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Lansdorp, B. (author), Ockels, W. (author)
This paper presents the design of a 100 MW Laddermill. The Laddermill is a novel concept to generate electricity from high altitude winds. The concept allows very large single unit powers. It generates electricity by pulling a rope from a generator, with lift generated by kites. For a 100 MW Laddermill 50 kites are distributed evenly in the top...
conference paper 2005
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Lansdorp, B. (author), Remes, B.D.W. (author), Ockels, W. (author)
This paper presents the design and testing of a remotely controlled surfkite for the Laddermill. The Laddermill is a novel concept to generate electricity from high altitude winds. It generates electricity by pulling a rope from a generator, with lift generated by kites. Part of the rope that is connected to the kites is wound around the...
conference paper 2005
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Ockels, W.J. (author), Lansdorp, B. (author), Breukels, J. (author), Spierenburg, G.J. (author)
conference paper 2004
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Williams, P. (author), Ockels, W.J. (author)
The tethered space elevator could provide a revolutionary means for enabling cheap transportation to geostationary altitude and beyond. Assuming that such a system can be built, one of the dynamic design problems is determining a means of moving the elevator along the tether so as to minimize the residual librational motion of the elevator...
conference paper
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