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The SkySails-System consists of three simple main components: A towing kite with rope, a launch and recovery system, and a control system for automatic operation.
Instead of a traditional sail fitted to a mast, SkySails uses large towing kites for the propulsion of the ship. Their shape is comparable to that of a paraglider. The towing kite is made of high-strength and weatherproof textiles.
The tethered flying SkySails can operate at altitudes between 100 and 300 m where stronger and more stable winds prevail.By means of dynamic flight maneuvers , e.g. the figure of "8", SkySails easily generate five to 25 times more power per square meter sail area than conventional sails.
The tractive forces are transmitted to the ship via a highly tear-proof, synthetic rope. The energy supply of the control pod is ensured by means of a patented special cable integrated in the towing rope.
The SkySails-System can be operated from the bridge. Launch and recovery as well as emergency actions can be initiated at the push of a button. The SkySails‘ automatic control system performs the tasks of steering the towing kite and adjusting its flight path. All information on the operation status of the system is displayed in real-time on a monitor and easily accessible for the captain.
During launch, the telescopic mast raises the towing kite - which is folded like an accordeon - from the kite storage. Subsequently, the telescopic mast extends to its maximum height. The towing kite then unfolds to its full size and can be launched. The winch releases the towing rope until operating altitude has been reached.
The recovery process is performed in the reverse order of the launch. The winch retracts the towing rope and the towing kite docks on the launch and recovery mast. The towing kite is then reefed. The telescopic mast retracts and the towing kite is stowed in the kite storage along with the control pod.
The entire launch and recovery procedure is carried out largely automatically and lasts approx. 10 - 20 mins each.
The SkySails-System is designed for operation in predominantly prevailing wind forces of 3 to 8 Beaufort at sea. The system can be recovered, but not launched at wind forces below 3 Beaufort.
Their double-wall profile gives the SkySails towing kites aerodynamic properties similar to the wing of an aircraft. Thus, the SkySails-System can operate not just downwind, but at courses of up to 50° to the wind as well.
Unlike conventional wind propulsions the SkySails-System causes minimal heel.
All components of the SkySails-System can be easily integrated into the ship's design. It is also possible to retrofit existing yachts with the SkySails propulsion.
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