Caution: Twind seems to have evolved a
second foci, one with just one tether,
so avoid seeing the graphic as the only offer.
|2010 PDF document shows more interest in a single-line
yo-yo method. First showings concerned the double affair. A new
direction toward a SINGLE tether with one trunk of parts in yo-yo method
seems to be grabbing their attention.
See their new
10 page PDF. See AWEgroup
Pulci document is not yet available, only abstract and :
SYSTEM WITH SELF OPENING AND CLOSING OF SAILS
French SYSTÈME DE GÉNÉRATION D'ÉNERGIE À OUVERTURE ET FERMETURE AUTOMATIQUES DE VOILES
One of the first foci by Twind Technology concept uses a pair of captive balloons at an altitude of 800 meters. The tether cables transmit force to a rotating platform on the ground.
Each balloon has a sail connected to it. The two balloons move alternately, the balloon with the sail open moves downwind and draws the other balloon upwind, and then the motion reverses. The tether cable can be used to turn the shaft of a generator to produce electrical energy.
TWIND technology is a concept Zanettistudios S.r.l. and intends to propose an innovative method in order to exploit the Eolic energy with low costs, higher continuity and a minor environmental impact. TWIND activities are described in Internet site: Twind®
TWIND technology is undergoing the European patent demand no. 08425554.6 of August 8, 2008.
The name TWIND and relative patent have been deposited at Italian National Registry of Patents and Trademarks [Ed: spelling. Email clarification was sent on May 23, 2009]
Commentary by AWE members
Consider shuttling passenger between two islands; let the wind pull a set of persons in one direction; then power the other line sector to the other wing and draw back persons or goods to the other island. While doing this, also be generating electricity.
AirborneWindEnergy/message/8386 and comments to that post.
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