{"wikiid":12173,"langid":"en","namespace":"CATEGORY","title":"Bendix Magneto","revisionid":2761605,"contents_raw":"[image|190580]\n\n== Background ==\n\nBendix S1200 is the largest and heaviest but is less prone to cracking. This magneto has TMC casted into the housing.\n\nBendix S4LN-xxx, S4RN-xxx, S6LN-xxx, S6LN-xxx are the most common types of magnetos.\n\nThe Bendix magneto, also known as an ignition magneto, was developed by Andre Boudeville but perfected by Robert Bosch and Frederick Richard Simms. The magneto is a permanent electrical generator that produces high voltage for spark plugs. The magneto is used in aviation because it is more reliable than a battery coil system.\n\nThis specific Magneto\u2019s responsibility is to ignite the fuel in the engine of the helicopter.  It is an electrical generator that creates impulses of high voltage that are needed in order for the helicopter to become airborne.\n\n== Identification ==\n\nThe part number, S6RN-23, can be located on the name-plate on the magneto.\n\n== Additional Information ==\n\n[link|http:\/\/science.howstuffworks.com\/question375.htm|How Stuff Works (magneto)]\n\n[link|http:\/\/www.pilotfriend.com\/training\/flight_training\/fxd_wing\/ignition_system.htm|Ignition system functions]\n\n[document|2004609|Univair Engine and Fuel System Catalog]","contents_json":{"type":"doc","content":[{"type":"paragraph","content":[{"type":"wikiImage","attrs":{"imageid":"190580","size":"standard","align":"left","caption":null,"link":null,"newWindow":false,"renditions":{"standard":{"src":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YdKkkB5o4pnjIvFk.standard","width":169,"height":225},"medium":{"src":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YdKkkB5o4pnjIvFk.medium","width":333,"height":444},"large":{"src":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YdKkkB5o4pnjIvFk.large","width":450,"height":600},"huge":{"src":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YdKkkB5o4pnjIvFk.huge","width":900,"height":1200},"original":{"src":"https:\/\/guide-images.cdn.ifixit.com\/igi\/YdKkkB5o4pnjIvFk.full","width":1944,"height":2592}}}}]},{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"Background"}]},{"type":"paragraph","content":[{"type":"text","text":"Bendix S1200 is the largest and heaviest but is less prone to cracking. This magneto has TMC casted into the housing."}]},{"type":"paragraph","content":[{"type":"text","text":"Bendix S4LN-xxx, S4RN-xxx, S6LN-xxx, S6LN-xxx are the most common types of magnetos."}]},{"type":"paragraph","content":[{"type":"text","text":"The Bendix magneto, also known as an ignition magneto, was developed by Andre Boudeville but perfected by Robert Bosch and Frederick Richard Simms. The magneto is a permanent electrical generator that produces high voltage for spark plugs. The magneto is used in aviation because it is more reliable than a battery coil system."}]},{"type":"paragraph","content":[{"type":"text","text":"This specific Magneto\u2019s responsibility is to ignite the fuel in the engine of the helicopter.  It is an electrical generator that creates impulses of high voltage that are needed in order for the helicopter to become airborne."}]},{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"Identification"}]},{"type":"paragraph","content":[{"type":"text","text":"The part number, S6RN-23, can be located on the name-plate on the magneto."}]},{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"Additional Information"}]},{"type":"paragraph","content":[{"type":"text","marks":[{"type":"link","attrs":{"href":"http:\/\/science.howstuffworks.com\/question375.htm","target":false}}],"text":"How Stuff Works (magneto)"}]},{"type":"paragraph","content":[{"type":"text","marks":[{"type":"link","attrs":{"href":"http:\/\/www.pilotfriend.com\/training\/flight_training\/fxd_wing\/ignition_system.htm","target":false}}],"text":"Ignition system functions"}]},{"type":"paragraph","content":[{"type":"text","text":"Univair Engine and Fuel System Catalog","marks":[{"type":"siteLink","attrs":{"kind":"document","id":"2004609","options":"","defaultText":null,"newWindow":false,"href":"\/Document\/LaAbpIHLFJx6KYRD\/Univair-Engine-and-Fuel-System-Catalog.pdf"}}]}]}]},"contents_rendered":"<div class=\"imageBox imageBox_left\"><a href=\"https:\/\/guide-images.cdn.ifixit.com\/igi\/YdKkkB5o4pnjIvFk.huge\" target=\"_blank\" class=\"js-lightbox-image\" data-lightbox-src=\"https:\/\/guide-images.cdn.ifixit.com\/igi\/YdKkkB5o4pnjIvFk.huge\" onclick=\"if (!window.lightboxImageClicksBound &amp;&amp; !(event.metaKey || event.ctrlKey || event.shiftKey || event.altKey)) { window.open(&quot;https:\\\/\\\/guide-images.cdn.ifixit.com\\\/igi\\\/YdKkkB5o4pnjIvFk.huge&quot;, '', 'width=900,height=1200'); return false; }\"><img src=\"https:\/\/guide-images.cdn.ifixit.com\/igi\/YdKkkB5o4pnjIvFk.standard\" width=\"169\" height=\"225\" class=\"hasMenu\" alt=\"Image\" \/><\/a><\/div>\n\n<div class=\"clearer\"><\/div><div class=\"headerContainer\"><a class=\"selfLink\" href=\"#Section_Background\" title=\"Link to this section\" aria-hidden=\"true\" tabindex=\"-1\"><span    class=\"fa-svg-icon\"><svg width=\"16\" height=\"16\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\" overflow=\"visible\"><!--! Font Awesome Pro 7.3.1 by @fontawesome - https:\/\/fontawesome.com License - https:\/\/fontawesome.com\/license (Commercial License) Copyright 2026 Fonticons, Inc. --><path d=\"M427.5 88c-21.4 0-42.2 6.9-59.3 19.4-11.4-11.7-24.4-22.1-38.4-30.7 27-23.6 61.7-36.7 97.7-36.7 82 0 148.5 66.5 148.5 148.5 0 39.4-15.6 77.1-43.5 105l-79.1 79.1c-27.8 27.8-65.6 43.5-105 43.5-82 0-148.5-66.5-148.5-148.5 0-17.9 3.2-35.5 9.4-51.9 4.6-12.4 18.5-18.7 30.9-14.1S259 220 254.4 232.4c-4.2 11.1-6.4 23-6.4 35.2 0 55.5 45 100.5 100.5 100.5 26.6 0 52.2-10.6 71-29.4l79.1-79.1C517.4 240.6 528 215.1 528 188.5 528 133 483 88 427.5 88zm-200 56c-26.6 0-52.2 10.6-71 29.4L77.4 252.5c-18.8 18.8-29.4 44.4-29.4 71 0 55.5 45 100.5 100.5 100.5 21.4 0 42.2-6.9 59.3-19.4 11.4 11.8 24.4 22.1 38.4 30.7-27 23.6-61.7 36.7-97.7 36.7-82 0-148.5-66.5-148.5-148.5 0-39.4 15.6-77.1 43.5-105l79.1-79.1c27.8-27.8 65.6-43.5 105-43.5 82 0 148.5 66.5 148.5 148.5 0 17.9-3.2 35.5-9.4 51.9-4.6 12.4-18.5 18.7-30.9 14.1S317 292 321.6 279.6c4.2-11.1 6.4-23 6.4-35.1 0-55.5-45-100.5-100.5-100.5z\"\/><\/svg><\/span><\/a><h2 id=\"Section_Background\" class=\"header\">Background<\/h2><\/div>\n\n<p>Bendix S1200 is the largest and heaviest but is less prone to cracking. This magneto has TMC casted into the housing.<\/p>\n\n<p>Bendix S4LN-xxx, S4RN-xxx, S6LN-xxx, S6LN-xxx are the most common types of magnetos.<\/p>\n\n<p>The Bendix magneto, also known as an ignition magneto, was developed by Andre Boudeville but perfected by Robert Bosch and Frederick Richard Simms. The magneto is a permanent electrical generator that produces high voltage for spark plugs. The magneto is used in aviation because it is more reliable than a battery coil system.<\/p>\n\n<p>This specific Magneto\u2019s responsibility is to ignite the fuel in the engine of the helicopter.  It is an electrical generator that creates impulses of high voltage that are needed in order for the helicopter to become airborne.<\/p>\n\n<div class=\"clearer\"><\/div><div class=\"headerContainer\"><a class=\"selfLink\" href=\"#Section_Identification\" title=\"Link to this section\" aria-hidden=\"true\" tabindex=\"-1\"><span    class=\"fa-svg-icon\"><svg width=\"16\" height=\"16\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\" overflow=\"visible\"><!--! Font Awesome Pro 7.3.1 by @fontawesome - https:\/\/fontawesome.com License - https:\/\/fontawesome.com\/license (Commercial License) Copyright 2026 Fonticons, Inc. --><path d=\"M427.5 88c-21.4 0-42.2 6.9-59.3 19.4-11.4-11.7-24.4-22.1-38.4-30.7 27-23.6 61.7-36.7 97.7-36.7 82 0 148.5 66.5 148.5 148.5 0 39.4-15.6 77.1-43.5 105l-79.1 79.1c-27.8 27.8-65.6 43.5-105 43.5-82 0-148.5-66.5-148.5-148.5 0-17.9 3.2-35.5 9.4-51.9 4.6-12.4 18.5-18.7 30.9-14.1S259 220 254.4 232.4c-4.2 11.1-6.4 23-6.4 35.2 0 55.5 45 100.5 100.5 100.5 26.6 0 52.2-10.6 71-29.4l79.1-79.1C517.4 240.6 528 215.1 528 188.5 528 133 483 88 427.5 88zm-200 56c-26.6 0-52.2 10.6-71 29.4L77.4 252.5c-18.8 18.8-29.4 44.4-29.4 71 0 55.5 45 100.5 100.5 100.5 21.4 0 42.2-6.9 59.3-19.4 11.4 11.8 24.4 22.1 38.4 30.7-27 23.6-61.7 36.7-97.7 36.7-82 0-148.5-66.5-148.5-148.5 0-39.4 15.6-77.1 43.5-105l79.1-79.1c27.8-27.8 65.6-43.5 105-43.5 82 0 148.5 66.5 148.5 148.5 0 17.9-3.2 35.5-9.4 51.9-4.6 12.4-18.5 18.7-30.9 14.1S317 292 321.6 279.6c4.2-11.1 6.4-23 6.4-35.1 0-55.5-45-100.5-100.5-100.5z\"\/><\/svg><\/span><\/a><h2 id=\"Section_Identification\" class=\"header\">Identification<\/h2><\/div>\n\n<p>The part number, S6RN-23, can be located on the name-plate on the magneto.<\/p>\n\n<div class=\"clearer\"><\/div><div class=\"headerContainer\"><a class=\"selfLink\" href=\"#Section_Additional_Information\" title=\"Link to this section\" aria-hidden=\"true\" tabindex=\"-1\"><span    class=\"fa-svg-icon\"><svg width=\"16\" height=\"16\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\" overflow=\"visible\"><!--! Font Awesome Pro 7.3.1 by @fontawesome - https:\/\/fontawesome.com License - https:\/\/fontawesome.com\/license (Commercial License) Copyright 2026 Fonticons, Inc. --><path d=\"M427.5 88c-21.4 0-42.2 6.9-59.3 19.4-11.4-11.7-24.4-22.1-38.4-30.7 27-23.6 61.7-36.7 97.7-36.7 82 0 148.5 66.5 148.5 148.5 0 39.4-15.6 77.1-43.5 105l-79.1 79.1c-27.8 27.8-65.6 43.5-105 43.5-82 0-148.5-66.5-148.5-148.5 0-17.9 3.2-35.5 9.4-51.9 4.6-12.4 18.5-18.7 30.9-14.1S259 220 254.4 232.4c-4.2 11.1-6.4 23-6.4 35.2 0 55.5 45 100.5 100.5 100.5 26.6 0 52.2-10.6 71-29.4l79.1-79.1C517.4 240.6 528 215.1 528 188.5 528 133 483 88 427.5 88zm-200 56c-26.6 0-52.2 10.6-71 29.4L77.4 252.5c-18.8 18.8-29.4 44.4-29.4 71 0 55.5 45 100.5 100.5 100.5 21.4 0 42.2-6.9 59.3-19.4 11.4 11.8 24.4 22.1 38.4 30.7-27 23.6-61.7 36.7-97.7 36.7-82 0-148.5-66.5-148.5-148.5 0-39.4 15.6-77.1 43.5-105l79.1-79.1c27.8-27.8 65.6-43.5 105-43.5 82 0 148.5 66.5 148.5 148.5 0 17.9-3.2 35.5-9.4 51.9-4.6 12.4-18.5 18.7-30.9 14.1S317 292 321.6 279.6c4.2-11.1 6.4-23 6.4-35.1 0-55.5-45-100.5-100.5-100.5z\"\/><\/svg><\/span><\/a><h2 id=\"Section_Additional_Information\" class=\"header\">Additional Information<\/h2><\/div>\n\n<p><a href=\"http:\/\/science.howstuffworks.com\/question375.htm\" rel=\"nofollow noopener noreferrer\">How Stuff Works (magneto)<\/a><\/p>\n\n<p><a href=\"http:\/\/www.pilotfriend.com\/training\/flight_training\/fxd_wing\/ignition_system.htm\" rel=\"nofollow noopener noreferrer\">Ignition system functions<\/a><\/p>\n\n<p><a href=\"\/Document\/LaAbpIHLFJx6KYRD\/Univair-Engine-and-Fuel-System-Catalog.pdf\" class=\"docLink\"><span    class=\"fa-svg-icon docLink-icon\"><svg width=\"14\" height=\"14\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 384 512\" overflow=\"visible\"><!--! 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