{"id":124319,"date":"2026-04-26T06:12:15","date_gmt":"2026-04-26T06:12:15","guid":{"rendered":"https:\/\/mailinvest.blog\/index.php\/2026\/04\/26\/alexander-3d-printed-a-real-engine-that-runs\/"},"modified":"2026-04-26T06:13:16","modified_gmt":"2026-04-26T06:13:16","slug":"alexander-3d-printed-a-real-engine-that-runs","status":"publish","type":"post","link":"https:\/\/mailinvest.blog\/index.php\/2026\/04\/26\/alexander-3d-printed-a-real-engine-that-runs\/","title":{"rendered":"Alexander 3D-Printed a Real Engine That Runs"},"content":{"rendered":"<p> <a href=\"https:\/\/go.fiverr.com\/visit\/?bta=1052423&nci=17043\" Target=\"_Top\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/fiverr.ck-cdn.com\/tn\/serve\/?cid=40081059\"  width=\"601\" height=\"201\"><\/a>\n<\/p>\n<div>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/04\/25194328\/3d-printed-working-engine.jpg\" alt=\"3D-Printed Working Engine\" width=\"1280\" height=\"853\"\/><br \/>Alexander labored in his workshop for years on a easy purpose: to show spools of on a regular basis filament right into a workable inside combustion <a href=\"https:\/\/www.techeblog.com\/nasa-rs-25-engine-hot-fire-test-space-launch-system-rocket\/\">engine<\/a>. That&#8217;s, something with a number of hundred horsepower to get the getting older bones going. His third technology of this made-from-scratch engine, often called the AP3 Carbon D125, has not too long ago met that concentrate on. The brand new design surrounds a 125cc single-cylinder four-stroke engine, which is usually present in scooters.<\/p>\n<p><span id=\"more-241563\"\/><br \/><iframe loading=\"lazy\" title=\"I 3D Printed a Working Engine (3rd Generation)\" width=\"720\" height=\"405\" data-lazy=\"true\" data-src=\"https:\/\/www.youtube.com\/embed\/4Hpt5vjSHq0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><br \/>The vast majority of the engine elements had been created in his workshop utilizing an Elegoo Centauri Carbon 2 Combo printer and quite a lot of various kinds of filament, particularly ASA, ABS, and PET-CF, however the cylinder bore is lined with a chrome steel sleeve, giving the whole factor a bit extra reliability than the opposite elements. A good friend at a CNC store delivered the top, which was machined from aluminum to include 4 valves and twin overhead cams. Bearings, belts, and a few odd bits of {hardware} had been required to finish the engine. The earlier makes an attempt taught us a number of exhausting classes, because the second engine ran for 4 minutes earlier than warmth melted the cylinder physique and killed the compression utterly, the nuts had been in some awkward spots, torque was not possible to use evenly, and water and oil combined inside the top. Alexander needed to just about dismantle every little thing and begin from scratch.<\/p>\n<div class=\"aawp\">\n<div class=\"aawp-product aawp-product--horizontal\" data-aawp-product-asin=\"B0D17TMWFB\" data-aawp-product-id=\"229152\" data-aawp-tracking-id=\"tec02e-20\" data-aawp-product-title=\"Bambu Lab A1 3D Printer Support Multi-Color 3D Printing High Speed &amp; Precision Full-Auto Calibration &amp; Active Flow Rate Compensation \u226448 dB Quiet FDM 3D Printers 256 * 256 * 256mm\u00b3 Build Volume\">\n<div class=\"aawp-product__thumb\">\n        <a class=\"aawp-product__image-link\" href=\"https:\/\/www.amazon.com\/dp\/B0D17TMWFB?tag=tec02e-20&amp;linkCode=ogi&amp;th=1&amp;psc=1\" title=\"Bambu Lab A1 3D Printer, Support Multi-Color 3D Printing, High Speed &amp; Precision, Full-Auto Calibration...\" rel=\"nofollow noopener sponsored\" target=\"_blank\"><br \/>\n            <img decoding=\"async\" class=\"aawp-product__image\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/m.media-amazon.com\/images\/I\/31iURSU5R7L._SL160_.jpg\" alt=\"Bambu Lab A1 3D Printer, Support Multi-Color 3D Printing, High Speed &amp; Precision, Full-Auto Calibration...\"\/><br \/>\n        <\/a><\/p><\/div>\n<div class=\"aawp-product__content\">\n        <a class=\"aawp-product__title\" href=\"https:\/\/www.amazon.com\/dp\/B0D17TMWFB?tag=tec02e-20&amp;linkCode=ogi&amp;th=1&amp;psc=1\" title=\"Bambu Lab A1 3D Printer, Support Multi-Color 3D Printing, High Speed &amp; Precision, Full-Auto Calibration...\" rel=\"nofollow noopener sponsored\" target=\"_blank\"><br \/>\n            Bambu Lab A1 3D Printer, Support Multi-Color 3D Printing, High Speed &amp; Precision, Full-Auto Calibration&#8230;        <\/a><\/p>\n<div class=\"aawp-product__description\">\n<ul>\n<li>Excessive-Velocity Precision: Expertise unparalleled pace and precision with the Bambu Lab A1 3D Printer. With a powerful acceleration of 10,000 mm\/s&#8230;<\/li>\n<li>Multi-Colour Printing with AMS lite: Unlock your creativity with vibrant and multi-colored 3D prints. The Bambu Lab A1 3D printers make multi-color&#8230;<\/li>\n<li>Full-Auto Calibration: Say goodbye to guide calibration hassles. The A1 3D printer takes care of all of the calibration processes routinely&#8230;<\/li>\n<\/ul><\/div>\n<\/p><\/div>\n<\/div>\n<\/div>\n<p>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/04\/25201533\/3d-printed-working-engine-1.jpg\" alt=\"3D-Printed Working Engine\" width=\"1280\" height=\"720\"\/><br \/>\nThis time, nevertheless, he put an oil pump instantly into the crankcase. 4 small bearings and a pair of gears revolve inside a printed enclosure to perform this. A fundamental stress regulator suits in the principle gallery and ensures that the oil will get to the place it must be. There\u2019s no want for an exterior pump this time. He additionally put in a separate optimistic crankcase air flow system to maintain the oil the place it belonged. The cooling system underwent the same makeover. A mechanical water pump was printed onto the cylinder physique. Its impeller rotates on bearings and a timing belt. Coolant circulates by passages within the skull and across the sleeves. Lengthy story quick, there are not any fancy electrical pumps and no mysterious leaks between the oil and water traces.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/04\/25201538\/3d-printed-working-engine-2.jpg\" alt=\"3D-Printed Working Engine\" width=\"1280\" height=\"720\"\/><br \/>Now, he used the outdated crankshaft from his prior makes an attempt, however first checked it with a dial indicator. The needle modified solely 0.05 millimeters, which is nicely inside the tolerance for a 125cc engine. He additionally created a head gasket with braided copper wire across the sleeve and a high-temperature materials rated for 1,000 levels Celsius. Placing all of it collectively was a tedious activity. Alexander hand lapped the valves and punctiliously sealed every joint. When every little thing was prepared, he stuffed the crankcase with 10W40 and connected it to a take a look at rig.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/04\/25201543\/3d-printed-working-engine-3.jpg\" alt=\"3D-Printed Working Engine\" width=\"1280\" height=\"720\"\/><br \/>The preliminary crank introduced immediate results, and this time it caught, settled into a gentle idle, and stored the compression, which was a great begin; nevertheless, a quick timing verify revealed that the water-pump pulley was spinning on the incorrect pace because of a slipped tensioner. A bit tweak and it was all set. On the second run, the pump operated nicely and the coolant flowed correctly. Nevertheless, the oil stress gauge remained silent, both as a result of the sender required calibration or as a result of the tolerances had been just a bit too free, and a suspected vacuum leak appeared on the consumption facet the place the epoxy had not but been totally utilized. Nonetheless, it ran easily sufficient to reveal that the principle structure held collectively correctly.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/images.techeblog.com\/wp-content\/uploads\/2026\/04\/25201548\/3d-printed-working-engine-4.jpg\" alt=\"3D-Printed Working Engine\" width=\"1280\" height=\"720\"\/><br \/>Alexander believes the crankcase oil pump was the true sport changer; seeing the oil pour by the gallery throughout a bench take a look at gave him the boldness to place the remainder collectively and see it function. Each printed half not solely survived, however appeared to handle the warmth and vibration of the primary jiffy with ease.<br \/><span>[<a href=\"https:\/\/hackaday.com\/2026\/04\/25\/you-wouldnt-download-a-combustion-engine\/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Source<\/a>]<\/span><\/p>\n<\/p><\/div>\n<iframe data-lazy=\"true\" data-src=\"https:\/\/www.fiverr.com\/gig_widgets?id=U2FsdGVkX18x7XQvttUTrv1oEqmGNGTgvvCUiUoJ\/AP4z\/UyMz8lXGOLpu15jIMxBbTR0gmD5uBoFvhC4KWeALQRp3h\/X\/AwcVD0K8Wj9H\/ZzYKzcCNHosB9oS4SCJJFWiN85P9ICAc4OgCoE\/wHKIY7CDkf2\/DQ1vqGvk4smVe5cRDEmrLPCWi4FC8p40VUhSmWQ5udCm0zoJtorgWv3vbDQw0kKYkwn39ozAnQXDe+YvWMxkLFWA+O3TFwkJvdkIK+\/AUSnRssPKt5WHY0FhNOxnSPcLslEL4G4\/RfP95ve99U+kRnDy3X+KtzdQLY+u935ghON\/o3UE4IMv9oN6JX9RnxzL\/LRcOgnHigxStSGPKsZYtnz8RWNVT\/rOLAibqiWJadC5MYHRbekF3eg6FOGrQGkXYbsn0+a5aovnlLCbLwIqY9fcS17UX8J235iQ6cdmHNbrPeS84CMm34RA==&affiliate_id=1052423&strip_google_tagmanager=true\" loading=\"lazy\" data-with-title=\"true\" class=\"fiverr_nga_frame\" frameborder=\"0\" height=\"350\" width=\"100%\" referrerpolicy=\"no-referrer-when-downgrade\" data-mode=\"random_gigs\" onload=\" var frame = this; var script = document.createElement('script'); script.addEventListener('load', function() { window.FW_SDK.register(frame); }); script.setAttribute('src', 'https:\/\/www.fiverr.com\/gig_widgets\/sdk'); document.body.appendChild(script); \" ><\/iframe>\n<br \/><a href=\"https:\/\/www.techeblog.com\/3d-printed-working-engine\/\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Alexander labored in his workshop for years on a easy purpose: to show spools of on a regular basis filament right into a workable inside&#8230;<\/p>\n","protected":false},"author":1,"featured_media":124320,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-124319","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech-universe"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Alexander 3D-Printed a Real Engine That Runs - mailinvest.blog<\/title>\n<meta name=\"description\" content=\"Technology is forever changing, and there are always new pieces of technology to replace obsolete ones. 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