{"id":8,"date":"2018-08-09T13:50:07","date_gmt":"2018-08-09T13:50:07","guid":{"rendered":"http:\/\/commons.princeton.edu\/59-tiger-cub\/?page_id=8"},"modified":"2018-08-10T12:25:50","modified_gmt":"2018-08-10T12:25:50","slug":"clutch","status":"publish","type":"page","link":"https:\/\/commons.princeton.edu\/59-tiger-cub\/clutch\/","title":{"rendered":"Clutch"},"content":{"rendered":"<div class=\"header-component\">\n<h3>Andrew Hanna, Dan Taub, Danny Zirkel<\/h3>\n<\/div>\n<h3 class=\"component-spacing\">What is it?<\/h3>\n<div class=\"picture-component\">\n<div class=\"left\">\n<div class=\"row\">\n<div class=\"cell\"><\/div>\n<\/div>\n<div class=\"row\">\n<div class=\"cell\">Clutch (n) &#8212; a device that enables two revolving shafts to be joined or disconnected as required,\u00a0esp\u00a0one that transmits the drive from the engine to the gearbox in a vehicle<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"picture-component\">\n<div id='gallery-1' class='gallery galleryid-8 gallery-columns-2 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture1.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture1-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-264\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-264'>\n\t\t\t\tFrom the Tiger Cub Bible\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture2.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture2-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-265\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-265'>\n\t\t\t\tExploded View &#8211; Photocreds: Dan Taub\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture3.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture3-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-266\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-266'>\n\t\t\t\tBack Plate &#8211; Purpose: Connected to main shaft; transfer rotational energy from clutch basket to transmission\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture4.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture4-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-267\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-267'>\n\t\t\t\tClutch Basket &#8211; Purpose: House the clutch plates; connected to primary chain  Specs: 48 teeth (vs. 18 on engine sprocket) Ratio: 2.67 \/ 1\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n<h3>Drive Train vs. Friction Plates<\/h3>\n<\/div>\n<figure id=\"attachment_268\" aria-describedby=\"caption-attachment-268\" style=\"width: 550px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-268 size-full\" src=\"http:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture6.jpg\" alt=\"\" width=\"550\" height=\"466\" srcset=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture6.jpg 550w, https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture6-300x254.jpg 300w\" sizes=\"auto, (max-width: 550px) 85vw, 550px\" \/><figcaption id=\"caption-attachment-268\" class=\"wp-caption-text\">(Image is a friction plate)<\/figcaption><\/figure>\n<div><strong>Purpose:<\/strong><\/div>\n<ul>\n<li>Friction plate: connected to clutch basket<\/li>\n<li>Driven plate: connected to inner hub<\/li>\n<li>When clutch depressed: both spin freely<\/li>\n<li>When clutch not depressed: surface friction prevents slippage (allows transfer of energy)<\/li>\n<\/ul>\n<p><strong>Specs:<\/strong><\/p>\n<ul>\n<li>Thickness: 1\/8 in<\/li>\n<li>Diameter: 4.95 in<\/li>\n<\/ul>\n<h3>Cups \/ Springs<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-269\" src=\"http:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture7.jpg\" alt=\"\" width=\"550\" height=\"366\" srcset=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture7.jpg 550w, https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture7-300x200.jpg 300w\" sizes=\"auto, (max-width: 550px) 85vw, 550px\" \/><\/p>\n<p><strong>Purpose:<\/strong><\/p>\n<ul>\n<li>Compress the clutch plates together when clutch is not engaged.<\/li>\n<\/ul>\n<p><strong>Specs:<\/strong><\/p>\n<ul>\n<li>Free length: 1.4 in<\/li>\n<li>Compressed length (for testing): .77 in<\/li>\n<li>Force applied during testing: 40lbs=177.93N<\/li>\n<li>Spring constant: 761lbs\/ft\u00a0= 11,120.55 N\/m<\/li>\n<\/ul>\n<h3>Lever<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-270\" src=\"http:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture8.jpg\" alt=\"\" width=\"550\" height=\"366\" srcset=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture8.jpg 550w, https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture8-300x200.jpg 300w\" sizes=\"auto, (max-width: 550px) 85vw, 550px\" \/><\/p>\n<p><strong>Purpose:<\/strong><\/p>\n<ul>\n<li>Utilize mechanical advantage to lower the force needed on the handle.<\/li>\n<\/ul>\n<p><strong>Specs:<\/strong><\/p>\n<ul>\n<li>Distance from pivot to push rod: .25 in<\/li>\n<li>Distance from push rod to applied force from cable: 2.5 in<\/li>\n<li>Mechanical advantage: 5:1<\/li>\n<\/ul>\n<p>Not listed here: Primary Chain, Push Rod<\/p>\n<div class=\"picture-component\">\n<h3>The Science Behind<\/h3>\n<div class=\"body\">\n<p>How much force is required to depress the clutch?<\/p>\n<p>(Measurements based on \u201958)<\/p>\n<p>Force to release clutch without any mechanical advantage: ~200lbs<\/p>\n<p>Divide by mechanical advantage of lever (5:1): ~40lbs<\/p>\n<p>Divide by mechanical advantage of clutch handle (2.5\/.6 =4.2:1): ~9.5lbs (with no friction)<\/p>\n<p><strong>Slippage:<\/strong><\/p>\n<p>Symptoms: Engine revs but no corresponding acceleration.<\/p>\n<p>How: Clutch\u00a0slippage is\u00a0when the\u00a0clutch plates are slipping across each other, rather than engaging and transferring engine torque to the drive train.<\/p>\n<p>Why: The\u00a0cause can be a poorly adjusted clutch, or worn springs, or worn plates.<\/p>\n<p>Our clutch slips at between 6 and 9\u00a0ft\u00a0lbs\u00a0with well-compressed springs.<\/p>\n<\/div>\n<div class=\"clear\"><\/div>\n<\/div>\n<h3 class=\"component-spacing\">Working With the &#8217;58<\/h3>\n<div class=\"picture-component\">\n<div class=\"body\">\n<p>Clutch was heavy, noisy<\/p>\n<p>**During testing, clutch cable \u201csnapped\u201d<\/p>\n<p>Solution 1: We used\u00a0emory\u00a0paper to smooth out the teeth on the driven clutch plates, then buttoned up and attached new cable<\/p>\n<p>Consequences: \u201cOh, well that\u2019s just awful.\u201d<\/p>\n<p>&nbsp;<\/p>\n<p>Solution 2: We lubed cable to stop noise; tightened adjustment screw for better\u00a0push-rod connection<\/p>\n<p>Consequences: &#8220;&#8230;still worse than it&#8217;s ever been.&#8221;<\/p>\n<p>Solution 3: Run cable along a straighter path (reduce friction)<\/p>\n<p>Consequences: \u201cThe best this clutch has ever felt!\u201d<\/p>\n<h3><strong>Reassembling the &#8217;59<\/strong><\/h3>\n<div id='gallery-2' class='gallery galleryid-8 gallery-columns-2 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture10.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture10-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-2-271\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-271'>\n\t\t\t\tThe assembled clutch basket, complete with driven plates, friction plates, cups and springs.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture11.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/Picture11-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-2-272\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-2-272'>\n\t\t\t\tThe assembled clutch in the engine casing, including the primary chain, lever and push rod.\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n<p><a href=\"http:\/\/commons.princeton.edu\/59-tiger-cub\/wp-content\/uploads\/sites\/79\/2018\/08\/The-Clutch2.pdf\">The-Clutch2<\/a><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Andrew Hanna, Dan Taub, Danny Zirkel What is it? Clutch (n) &#8212; a device that enables two revolving shafts to be joined or disconnected as required,\u00a0esp\u00a0one that transmits the drive from the engine to the gearbox in a vehicle Drive Train vs. Friction Plates Purpose: Friction plate: connected to clutch basket Driven plate: connected to &hellip; <a href=\"https:\/\/commons.princeton.edu\/59-tiger-cub\/clutch\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Clutch&#8221;<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-8","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-json\/wp\/v2\/pages\/8","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-json\/wp\/v2\/comments?post=8"}],"version-history":[{"count":4,"href":"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-json\/wp\/v2\/pages\/8\/revisions"}],"predecessor-version":[{"id":275,"href":"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-json\/wp\/v2\/pages\/8\/revisions\/275"}],"wp:attachment":[{"href":"https:\/\/commons.princeton.edu\/59-tiger-cub\/wp-json\/wp\/v2\/media?parent=8"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}