{"id":101,"date":"2026-01-26T17:00:53","date_gmt":"2026-01-26T17:00:53","guid":{"rendered":"https:\/\/apfelbeck.nl\/?page_id=101"},"modified":"2026-01-28T10:03:04","modified_gmt":"2026-01-28T10:03:04","slug":"ludwig-apfelbeck","status":"publish","type":"page","link":"https:\/\/apfelbeck.nl\/?page_id=101","title":{"rendered":"Ludwig Apfelbeck"},"content":{"rendered":"\n<div class=\"wp-block-group alignfull has-background-color has-white-color has-black-background-color has-text-color has-background has-link-color wp-elements-2f470cfd0c7f7d61f0325b55e899ae60 has-global-padding is-layout-constrained wp-container-core-group-is-layout-23b1a4dc wp-block-group-is-layout-constrained\" style=\"padding-top:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--30);padding-bottom:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--30)\">\n<div class=\"wp-block-group alignwide is-content-justification-space-between is-layout-flex wp-container-core-group-is-layout-b585a4aa wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group is-layout-flex wp-block-group-is-layout-flex\"><div class=\"is-default-size wp-block-site-logo\"><a href=\"https:\/\/apfelbeck.nl\/\" class=\"custom-logo-link\" rel=\"home\"><img loading=\"lazy\" decoding=\"async\" width=\"296\" height=\"296\" src=\"https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/Untitled.png\" class=\"custom-logo\" alt=\"\" srcset=\"https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/Untitled.png 296w, https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/Untitled-150x150.png 150w\" sizes=\"auto, (max-width: 296px) 100vw, 296px\" \/><\/a><\/div>\n\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-flex wp-block-group-is-layout-flex\"><nav class=\"is-responsive items-justified-right wp-block-navigation is-content-justification-right is-layout-flex wp-container-core-navigation-is-layout-f665d2b5 wp-block-navigation-is-layout-flex\" aria-label=\"Menu 12\" \n\t\t data-wp-interactive=\"core\/navigation\" data-wp-context='{\"overlayOpenedBy\":{\"click\":false,\"hover\":false,\"focus\":false},\"type\":\"overlay\",\"roleAttribute\":\"\",\"ariaLabel\":\"Menu\"}'><button aria-haspopup=\"dialog\" aria-label=\"Open menu\" class=\"wp-block-navigation__responsive-container-open\" \n\t\t\t\tdata-wp-on--click=\"actions.openMenuOnClick\"\n\t\t\t\tdata-wp-on--keydown=\"actions.handleMenuKeydown\"\n\t\t\t><svg width=\"24\" height=\"24\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M4 7.5h16v1.5H4z\"><\/path><path d=\"M4 15h16v1.5H4z\"><\/path><\/svg><\/button>\n\t\t\t\t<div class=\"wp-block-navigation__responsive-container\"  id=\"modal-1\" \n\t\t\t\tdata-wp-class--has-modal-open=\"state.isMenuOpen\"\n\t\t\t\tdata-wp-class--is-menu-open=\"state.isMenuOpen\"\n\t\t\t\tdata-wp-watch=\"callbacks.initMenu\"\n\t\t\t\tdata-wp-on--keydown=\"actions.handleMenuKeydown\"\n\t\t\t\tdata-wp-on--focusout=\"actions.handleMenuFocusout\"\n\t\t\t\ttabindex=\"-1\"\n\t\t\t>\n\t\t\t\t\t<div class=\"wp-block-navigation__responsive-close\" tabindex=\"-1\">\n\t\t\t\t\t\t<div class=\"wp-block-navigation__responsive-dialog\" \n\t\t\t\tdata-wp-bind--aria-modal=\"state.ariaModal\"\n\t\t\t\tdata-wp-bind--aria-label=\"state.ariaLabel\"\n\t\t\t\tdata-wp-bind--role=\"state.roleAttribute\"\n\t\t\t>\n\t\t\t\t\t\t\t<button aria-label=\"Close menu\" class=\"wp-block-navigation__responsive-container-close\" \n\t\t\t\tdata-wp-on--click=\"actions.closeMenuOnClick\"\n\t\t\t><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\" width=\"24\" height=\"24\" aria-hidden=\"true\" focusable=\"false\"><path d=\"m13.06 12 6.47-6.47-1.06-1.06L12 10.94 5.53 4.47 4.47 5.53 10.94 12l-6.47 6.47 1.06 1.06L12 13.06l6.47 6.47 1.06-1.06L13.06 12Z\"><\/path><\/svg><\/button>\n\t\t\t\t\t\t\t<div class=\"wp-block-navigation__responsive-container-content\" \n\t\t\t\tdata-wp-watch=\"callbacks.focusFirstElement\"\n\t\t\t id=\"modal-1-content\">\n\t\t\t\t\t\t\t\t<ul class=\"wp-block-navigation__container is-responsive items-justified-right wp-block-navigation\"><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/apfelbeck.nl\/?page_id=101\"><span class=\"wp-block-navigation-item__label\">Ludwig Apfelbeck<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/apfelbeck.nl\/?page_id=39\"><span class=\"wp-block-navigation-item__label\">VW OHC cylinderhead content in the Apfelbeck book<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/apfelbeck.nl\/?page_id=40\"><span class=\"wp-block-navigation-item__label\">History of the project<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/apfelbeck.nl\/?page_id=41\"><span class=\"wp-block-navigation-item__label\">Design objectives and choices<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/apfelbeck.nl\/?page_id=92\"><span class=\"wp-block-navigation-item__label\">Distibution (cam shaft)<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/apfelbeck.nl\/?page_id=42\"><span class=\"wp-block-navigation-item__label\">Contact us<\/span><\/a><\/li><\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><\/nav><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-style-section-5 has-global-padding is-layout-constrained wp-block-group-is-layout-constrained is-style-section-5--2\" style=\"margin-top:0;margin-bottom:0;padding-top:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-7ee84d44 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<h2 class=\"wp-block-heading\">Who was Ludwig Apfelbeck<\/h2>\n\n\n\n<p class=\"has-medium-font-size\">Ludwig Karl Apfelbeck was born in Austria at 19 August 1903 and past away in Graz, Austria in 1987.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"194\" height=\"259\" src=\"https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/images-3.jpg\" alt=\"\" class=\"wp-image-104\" style=\"aspect-ratio:1;object-fit:cover\"\/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0;margin-bottom:0;padding-top:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-47c06fe3 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:56%\">\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"573\" height=\"654\" src=\"https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/sad-4.png\" alt=\"\" class=\"wp-image-105\" style=\"aspect-ratio:1;object-fit:cover;width:720px;height:auto\" srcset=\"https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/sad-4.png 573w, https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/sad-4-263x300.png 263w\" sizes=\"auto, (max-width: 573px) 100vw, 573px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-container-core-column-is-layout-119bc444 wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Apfelbeck worked, amongst other venues, for BMW and Horex Maico and KTM. He patentet several cylinder head and valve operating designs (around 1960), all related to overhead camshafts.<\/h2>\n\n\n\n<p>His most famous patent was the radially orientated 4-valve OHC cylinderhead design, where the two inlet valves (and outlet valves ditto) are positioned opposed to one another. This concept originally seemed most useful in single cylinder motorcycle engines and the patent was already registered in 1937 (!). Apfelbeck used it later for BMW when he was asked to design a Formula 2 engine. He designed an in-line 4 cylinder 2 liter 16 valve (radial) OHC engine, which developed 280hp at 8500 RPM, remarkable at that time (early nineteen sixties)<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/de.wikipedia.org\/wiki\/Ludwig_Apfelbeck\">Learn more<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n<div class=\"is-default-size wp-block-site-logo\"><a href=\"https:\/\/apfelbeck.nl\/\" class=\"custom-logo-link\" rel=\"home\"><img loading=\"lazy\" decoding=\"async\" width=\"296\" height=\"296\" src=\"https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/Untitled.png\" class=\"custom-logo\" alt=\"\" srcset=\"https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/Untitled.png 296w, https:\/\/apfelbeck.nl\/wp-content\/uploads\/2026\/01\/Untitled-150x150.png 150w\" sizes=\"auto, (max-width: 296px) 100vw, 296px\" \/><\/a><\/div>\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:var(--wp--preset--spacing--60);padding-bottom:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-group alignwide is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group alignfull is-content-justification-space-between is-layout-flex wp-container-core-group-is-layout-91e87306 wp-block-group-is-layout-flex\">\n<p class=\"has-small-font-size\"><\/p>\n\n\n\n<p class=\"has-small-font-size\">copyright 2026\u00a9 Apfelbeck<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Who was Ludwig Apfelbeck Ludwig Karl Apfelbeck was born in Austria at 19 August 1903 and past away in Graz, Austria in 1987. Apfelbeck worked, amongst other venues, for BMW and Horex Maico and KTM. He patentet several cylinder head and valve operating designs (around 1960), all related to overhead camshafts. His most famous patent [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-101","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/apfelbeck.nl\/index.php?rest_route=\/wp\/v2\/pages\/101","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/apfelbeck.nl\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/apfelbeck.nl\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/apfelbeck.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/apfelbeck.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=101"}],"version-history":[{"count":7,"href":"https:\/\/apfelbeck.nl\/index.php?rest_route=\/wp\/v2\/pages\/101\/revisions"}],"predecessor-version":[{"id":149,"href":"https:\/\/apfelbeck.nl\/index.php?rest_route=\/wp\/v2\/pages\/101\/revisions\/149"}],"wp:attachment":[{"href":"https:\/\/apfelbeck.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}