Wind Turbine (HAWT, Archimedes) Version : see Contents

The AWT is a low-power wind turbine aimed at the domestic market. It makes use of the Archimedes Screw principle, and incorporates 3 tapered screw blades. A typical product description may be seen at: https://thearchimedes.com/images/pdf/AWM%20brochure%20Respect%202023%20HQ%20compressed.pdf, and an analysis of performance at: https://www.mdpi.com/1996-1073/12/24/4624. For a 1.5m diameter rotor the output power is claimed to be about 500W for a windspeed of about 13.3 m/s (30mph), but SL virtual windspeeds are typically much lower, so the design parameters have been adjusted to give a more acceptable performance.

Installation
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The AWT may be sited as provided on a flat surface such as a roof or plinth, or it can be mounted on a mast or pole. If desired, the optional AWT Windspeed Meter can be rezzed within a distance of 20m.
The minimum windspeed needed to operate the turbine, and the gear ratio which controls the rotor speed are given in the 'settings' notecard in the rotor Content. These can be edited by the owner. The rotor has a simple click on/off action. The turbine runs quietly, but for silent motion, the sound file can be removed from the rotor Content.

Performance Limitations
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Although the turbine is a HAWT, its axis will move to point into the wind, like a weather vane, in order to achieve optimum performance. In reality this happens on a continuous basis, but in SL it has been set to refresh only when the turbine starts or restarts after an automatic low-speed shutdown, otherwise the constant interruption of orientation would produce very erratic rotation because of the need to update the TargetOmega function.

Scripts have copy permission.