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		<id>https://www.designingbuildings.co.uk/w/index.php?action=history&amp;feed=atom&amp;title=Horizontal_Axis_Wind_Turbine_HAWT</id>
		<title>Horizontal Axis Wind Turbine HAWT - Revision history</title>
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		<updated>2026-05-20T07:31:29Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308190&amp;oldid=prev</id>
		<title>Editor at 08:51, 27 August 2025</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308190&amp;oldid=prev"/>
				<updated>2025-08-27T08:51:56Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 08:51, 27 August 2025&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 2:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 2:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In general HAWTs used on an industrial scale, such offshore location are most commonly placed upwind, that is to say that the rotor bladed are positioned in front of the tower to face the wind, with the gear and generation system behind. These upwind HAWTs are most popular as the offer higher energy efficiencies because the wind hits the blades directly as opposed to hitting the mechanism first and then the blades as is the case with downwind turbines. The advantage of down wind turbines is that they can pivot in the direction of the wind by using only the wind, as a sail might do by catching the air behind, upwind turbines need to be mechanically turned to face the wind.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In general HAWTs used on an industrial scale, such offshore location are most commonly placed upwind, that is to say that the rotor bladed are positioned in front of the tower to face the wind, with the gear and generation system behind. These upwind HAWTs are most popular as the offer higher energy efficiencies because the wind hits the blades directly as opposed to hitting the mechanism first and then the blades as is the case with downwind turbines. The advantage of down wind turbines is that they can pivot in the direction of the wind by using only the wind, as a sail might do by catching the air behind, upwind turbines need to be mechanically turned to face the wind.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;Both upwind and and downwind HAWTs can have varying numbers of blades, normally two or three spaced evenly, but single blade turbines do exist as well as small fan turbines with a higher number of blades spaced evenly around the central nose.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Articles_needing_more_work]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Articles_needing_more_work]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308189&amp;oldid=prev</id>
		<title>Editor at 08:49, 27 August 2025</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308189&amp;oldid=prev"/>
				<updated>2025-08-27T08:49:48Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 08:49, 27 August 2025&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;This type of wind turbine is the most common and seen across Europe &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;in &lt;/del&gt;simple terms it is 'a wind turbine whose rotor axis is substantially parallel to the wind flow.' ([https://www.wind-energy-the-facts.org/glossary.html Wind Energy - The Facts. March 2009. A European project financed by the Intelligent Energy]). In general &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;this type of turbine is, &lt;/del&gt;on industrial &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;scales &lt;/del&gt;most commonly placed upwind, that is to say that the &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;rotors &lt;/del&gt;are positioned in front of the tower to face the wind. These upwind HAWTs are most &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;common because they can &lt;/del&gt;offer higher energy efficiencies because the wind hits the blades directly.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;This type of wind turbine is the most common and seen across Europe&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;. In &lt;/ins&gt;simple terms it is 'a wind turbine whose rotor axis is substantially parallel to the wind flow.' ([https://www.wind-energy-the-facts.org/glossary.html Wind Energy - The Facts. March 2009. A European project financed by the Intelligent Energy]).&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In general &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;HAWTs used &lt;/ins&gt;on &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;an &lt;/ins&gt;industrial &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;scale, such offshore location are &lt;/ins&gt;most commonly placed upwind, that is to say that the &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;rotor bladed &lt;/ins&gt;are positioned in front of the tower to face the wind&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, with the gear and generation system behind&lt;/ins&gt;. These upwind HAWTs are most &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;popular as the &lt;/ins&gt;offer higher energy efficiencies because the wind hits the blades directly &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;as opposed to hitting the mechanism first and then the blades as is the case with downwind turbines. The advantage of down wind turbines is that they can pivot in the direction of the wind by using only the wind, as a sail might do by catching the air behind, upwind turbines need to be mechanically turned to face the wind&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Articles_needing_more_work]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Articles_needing_more_work]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308178&amp;oldid=prev</id>
		<title>Editor at 08:02, 27 August 2025</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308178&amp;oldid=prev"/>
				<updated>2025-08-27T08:02:35Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 08:02, 27 August 2025&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;'&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;A &lt;/del&gt;wind turbine whose rotor axis is substantially parallel to the wind flow.' ([https://www.wind-energy-the-facts.org/glossary.html Wind Energy - The Facts. March 2009. A European project financed by the Intelligent Energy])&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;This type of wind turbine is the most common and seen across Europe in simple terms it is &lt;/ins&gt;'&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;a &lt;/ins&gt;wind turbine whose rotor axis is substantially parallel to the wind flow.' ([https://www.wind-energy-the-facts.org/glossary.html Wind Energy - The Facts. March 2009. A European project financed by the Intelligent Energy])&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;. In general this type of turbine is, on industrial scales most commonly placed upwind, that is to say that the rotors are positioned in front of the tower to face the wind. These upwind HAWTs are most common because they can offer higher energy efficiencies because the wind hits the blades directly.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Articles_needing_more_work]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Articles_needing_more_work]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308177&amp;oldid=prev</id>
		<title>Editor at 07:56, 27 August 2025</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308177&amp;oldid=prev"/>
				<updated>2025-08-27T07:56:02Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 07:56, 27 August 2025&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;xx&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;'A wind turbine whose rotor axis is substantially parallel to the wind flow.' ([https://www.wind-energy-the-facts.org/glossary.html Wind Energy - The Facts. March 2009. A European project financed by the Intelligent Energy])&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Articles_needing_more_work]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Articles_needing_more_work]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308170&amp;oldid=prev</id>
		<title>Editor: moved Horizontal Axis Wind Turbine to Horizontal Axis Wind Turbine HAWT</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308170&amp;oldid=prev"/>
				<updated>2025-08-27T07:24:49Z</updated>
		
		<summary type="html">&lt;p&gt;moved &lt;a href=&quot;/wiki/Horizontal_Axis_Wind_Turbine&quot; class=&quot;mw-redirect&quot; title=&quot;Horizontal Axis Wind Turbine&quot;&gt;Horizontal Axis Wind Turbine&lt;/a&gt; to &lt;a href=&quot;/wiki/Horizontal_Axis_Wind_Turbine_HAWT&quot; title=&quot;Horizontal Axis Wind Turbine HAWT&quot;&gt;Horizontal Axis Wind Turbine HAWT&lt;/a&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='1' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='1' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 07:24, 27 August 2025&lt;/td&gt;
		&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308169&amp;oldid=prev</id>
		<title>Editor: Created page with &quot;xx  Category:Articles_needing_more_work  &quot;</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Horizontal_Axis_Wind_Turbine_HAWT&amp;diff=308169&amp;oldid=prev"/>
				<updated>2025-08-27T07:24:33Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;xx  &lt;a href=&quot;/wiki/Category:Articles_needing_more_work&quot; title=&quot;Category:Articles needing more work&quot;&gt;Category:Articles_needing_more_work&lt;/a&gt;  &amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;xx&lt;br /&gt;
&lt;br /&gt;
[[Category:Articles_needing_more_work]]&lt;/div&gt;</summary>
		<author><name>Editor</name></author>	</entry>

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