{"id":13981,"date":"2025-06-17T14:19:02","date_gmt":"2025-06-17T12:19:02","guid":{"rendered":"http:\/\/www.tgm.solutions\/?post_type=glossar&#038;p=13981"},"modified":"2025-08-01T11:09:19","modified_gmt":"2025-08-01T09:09:19","slug":"medium-aerodynamic-chord","status":"publish","type":"glossar","link":"https:\/\/www.tgm.solutions\/en\/glossar\/mittlere-aerodynamische-sehne\/","title":{"rendered":"The mean aerodynamic wing depth (MAC)"},"content":{"rendered":"<p>The <strong>Mean aerodynamic wing depth (MAC = Mean Aerodynamic Chord)<\/strong> is a mathematically determined, representative wing depth (airfoil depth) that replaces a real wing in terms of its aerodynamic properties. It represents the imaginary rectangular wing depth at which the <strong>Total force<\/strong> (buoyancy) and the <strong>Pitching moment<\/strong> of the actual wing would be identical.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1307\" height=\"893\" src=\"http:\/\/www.tgm.solutions\/wp-content\/uploads\/MAC-1.png\" alt=\"\" class=\"wp-image-15190\" srcset=\"https:\/\/www.tgm.solutions\/wp-content\/uploads\/MAC-1.png 1307w, https:\/\/www.tgm.solutions\/wp-content\/uploads\/MAC-1-512x350.png 512w, https:\/\/www.tgm.solutions\/wp-content\/uploads\/MAC-1-768x525.png 768w, https:\/\/www.tgm.solutions\/wp-content\/uploads\/MAC-1-1024x700.png 1024w, https:\/\/www.tgm.solutions\/wp-content\/uploads\/MAC-1-18x12.png 18w\" sizes=\"auto, (max-width: 1307px) 100vw, 1307px\" \/><\/figure>\n\n\n\n<p><strong>What is a \"chord\"\/wing depth?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A chord, from the English Mean Aerodynamic <strong>Chord<\/strong>is the straight-line distance from the leading edge to the trailing edge of a sash at any point.<\/li>\n\n\n\n<li>Aircraft wings vary in shape (tapered, swept, etc.), so the MAC provides a single average chord that accurately represents the aerodynamic behavior of the wing.<\/li>\n\n\n\n<li>For complex wings (e.g. multi-part), the MAC is determined from aerodynamic integration or CAD models.<\/li>\n<\/ul>\n\n\n\n<p><strong>&nbsp;Key terms<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LEMAC (Leading Edge of MAC): Where the MAC begins, normally measured from a defined line.<\/li>\n\n\n\n<li>%MAC: The position of the center of gravity in percent along the MAC (e.g. 25 % MAC means that the center of gravity is one quarter along the chord).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">In short<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>The MAC is the mean airfoil depth of a wing in which the aerodynamic effects of the entire wing - in particular lift and moment - are realistically simplified.<\/strong><\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>It is mainly used to<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>the <strong>Center of gravity (CG)<\/strong> in relation to the wing depth,<\/li>\n\n\n\n<li>the <strong>aerodynamic stability<\/strong> to assess,<\/li>\n\n\n\n<li>design and approval criteria (e.g. according to EASA or FAA).<\/li>\n<\/ul>\n\n\n\n<p><\/p>","protected":false},"featured_media":15190,"template":"","glossar-kategorie":[159],"class_list":["post-13981","glossar","type-glossar","status-publish","has-post-thumbnail","hentry","glossar-kategorie-luftfahrt"],"meta_box":[],"_links":{"self":[{"href":"https:\/\/www.tgm.solutions\/en\/wp-json\/wp\/v2\/glossar\/13981","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tgm.solutions\/en\/wp-json\/wp\/v2\/glossar"}],"about":[{"href":"https:\/\/www.tgm.solutions\/en\/wp-json\/wp\/v2\/types\/glossar"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tgm.solutions\/en\/wp-json\/wp\/v2\/media\/15190"}],"wp:attachment":[{"href":"https:\/\/www.tgm.solutions\/en\/wp-json\/wp\/v2\/media?parent=13981"}],"wp:term":[{"taxonomy":"glossar-kategorie","embeddable":true,"href":"https:\/\/www.tgm.solutions\/en\/wp-json\/wp\/v2\/glossar-kategorie?post=13981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}