{"id":161601,"date":"2026-04-01T15:48:52","date_gmt":"2026-04-01T13:48:52","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/sonex-aircraft-closes-its-doors-overnight\/"},"modified":"2026-04-07T10:18:05","modified_gmt":"2026-04-07T08:18:05","slug":"sonex-aircraft-closes-its-doors-overnight","status":"publish","type":"post","link":"https:\/\/migflug.com\/jetflights\/sonex-aircraft-closes-its-doors-overnight\/","title":{"rendered":"Sonex Aircraft Closes Its Doors Overnight"},"content":{"rendered":"\n<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\n\n\n<div style=\"background-color:#f5f5f5;padding:20px;border-radius:6px;margin:0 0 24px\">\r\n<h3 style=\"margin-top:0;color:#333\">Quick Facts: Sonex Closure<\/h3>\r\n<table style=\"width:100%;border-collapse:collapse;font-size:14px;line-height:1.8\">\r\n<tr style=\"background:#fff\">\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\"><strong>Closure Date<\/strong><\/td>\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\">Late March 2026, effective immediately<\/td>\r\n<\/tr>\r\n<tr style=\"background:#fafafa\">\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\"><strong>Aircraft Affected<\/strong><\/td>\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\">~700 Sonex, Waiex, and Onex aircraft worldwide<\/td>\r\n<\/tr>\r\n<tr style=\"background:#fff\">\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\"><strong>Location<\/strong><\/td>\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\">Oshkosh, Wisconsin<\/td>\r\n<\/tr>\r\n<tr style=\"background:#fafafa\">\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\"><strong>Owner<\/strong><\/td>\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\">Mark Schaible (purchased 2022)<\/td>\r\n<\/tr>\r\n<tr style=\"background:#fff\">\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\"><strong>Founded<\/strong><\/td>\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\">John Monnett (1990s), Oshkosh, WI<\/td>\r\n<\/tr>\r\n<tr style=\"background:#fafafa\">\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\"><strong>Reason<\/strong><\/td>\r\n<td style=\"padding:10px;border-bottom:1px solid #ddd\">&#8220;Perfect storm&#8221;\u2014bank pressure, sales decline, used aircraft competition<\/td>\r\n<\/tr>\r\n<tr style=\"background:#fff\">\r\n<td style=\"padding:10px\"><strong>Personal Impact<\/strong><\/td>\r\n<td style=\"padding:10px\">Owner and wife filed personal bankruptcy<\/td>\r\n<\/tr>\r\n<\/table>\r\n<\/div>\r\n\r\n<p>One day you&#8217;re a homebuilt aircraft manufacturer with two decades of history. The next day, you&#8217;re a memory.<\/p>\r\n\r\n<p>Sonex Aircraft shut down in late March 2026 with zero forewarning. No gradual wind-down. No farewell tour. Just an announcement that the factory\u2014a pillar of Oshkosh&#8217;s experimental aviation community since the 1990s\u2014would no longer exist. Owner Mark Schaible posted an emotional video explaining the closure, his voice carrying the weight of a man watching his dream burn.<\/p>\r\n\r\n<p>The numbers tell a devastating story. Roughly 700 Sonex aircraft are flying today. Waiex models. Onex single-seaters. Each one represents a builder&#8217;s dream: budget-conscious, kit-based, attainable performance. Now, every single one of those aircraft is orphaned. No factory support. No parts pipeline. No engineering team to troubleshoot issues. Just silence.<\/p>\r\n\r\n## The Perfect Storm\r\n\r\nSchaible&#8217;s explanation was brutally honest. He called it a &#8220;perfect storm&#8221;\u2014and he wasn&#8217;t exaggerating. The economic pressures hit from all directions at once.\r\n\r\nBank pressure was intense. Capital requirements for manufacturing never stop. Tooling, materials, labor, facility costs. Every month you operate, the debt servicing demands mount. And banks don&#8217;t care about emotional attachment to dreams. They care about return on investment.\r\n\r\n<p>Then came the market collapse. Orders plummeted. Aircraft buyers, it turns out, get cautious when recessions loom. The experimental aviation market contracted sharply. Fewer people could justify spending $40,000 to $60,000 on a kit when job security felt uncertain.<\/p>\r\n\r\n<p>But there was another factor Schaible couldn&#8217;t control: competition from his own product. The used aircraft market flooded with Sonex airframes built over the previous decades. Why buy a new kit for $50,000 when you could buy a completed, flown-in Sonex for $35,000? Schaible was, in effect, competing against his own legacy.<\/p>\r\n\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px\">\r\n<img data-opt-id=772325307  fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/e\/e3\/SonexC-GVZI01.jpg\/800px-SonexC-GVZI01.jpg\" alt=\"Sonex aircraft parked at airshow\" style=\"max-width:100%;height:auto;border-radius:6px\">\r\n<figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">A Sonex at rest. Hundreds of these sleek, all-metal homebuilts are now without factory support. (Photo: Wikimedia Commons)<\/figcaption>\r\n<\/figure>\r\n\r\n\r\nThe result? Personal bankruptcy. Not just the company\u2014Schaible and his wife filed for personal bankruptcy as well. The debt that the business carried became their debt. The dream that was supposed to be his legacy cost him everything.\r\n\r\n## What Was Sonex?\r\n\r\nTo understand the impact, you need to understand what Sonex represented. John Monnett founded the company in Oshkosh\u2014literally the capital of homebuilt aviation. EAA AirVenture happens there. Experimental aviation thrives there. Monnett designed something extraordinary: an all-metal monoplane kit that was fast, affordable, and beautiful.\r\n\r\nThe Sonex wasn&#8217;t a quick-build. It took dozens of hours. But it was completable by normal people with normal tools. No welding required. Aluminum rivets. Sheet metal work. Itfit the philosophy of the experimental aviation movement: accessibility, self-sufficiency, the joy of building something that actually flies.\r\n\r\n<p>And it flew exceptionally well. Cruise speeds around 120 mph. Burn rate near 4 gallons per hour. Range to make meaningful cross-country trips. The Sonex became a cult favorite among a certain breed of aviator\u2014the kind who valued simplicity and performance over complexity and cost.<\/p>\r\n\r\n<p>Many of those builders were military veterans. Retired pilots from the Air Force, Navy, and Marines who understood aircraft systems, precision work, and the discipline required to build something that won&#8217;t kill you when you fly it. The experimental aviation community has deep military roots, and the Sonex attracted people who saw building an airplane as a final independent project\u2014a way to create something entirely their own.<\/p>\r\n\r\n<p>Oshkosh itself was built on this ethos. EAA&#8217;s Paul Poberezny famously said, &#8220;The spirit of EAA is experimentation and freedom.&#8221; Sonex embodied that. For decades, it represented what was possible when you had a blueprint, grit, and the freedom to build.<\/p>\r\n\r\n## The Silence After\r\n\r\nHere&#8217;s what&#8217;s brutal about a sudden closure: there&#8217;s no transition. No knowledge transfer. No final Q&#038;A session where founders and new stewards pass the torch. Just a video. A farewell. And then\u2014nothing.\r\n\r\nFor 700 aircraft owners, the closure creates existential questions. What happens if your Waiex develops a structural issue and you need engineering guidance? What if you need replacement wingtip fairings? What happens when you want to upgrade your panel and need someone to verify the CG changes won&#8217;t affect certification?\r\n\r\n<p>The good news: John Monnett and Mark Schaible are reportedly looking for someone to continue supporting the fleet. The aircraft designs are solid. The community is passionate. There&#8217;s a chance\u2014not guaranteed, but possible\u2014that someone with capital and vision steps in to preserve the legacy.<\/p>\r\n\r\n<p>But that&#8217;s future talk. Today, right now, 700 aircraft sit at airports across North America and beyond. Their builders are processing what happened. Some feel abandoned. Some are angry. Others are simply sad that something beautiful ended so abruptly.<\/p>\r\n\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px\">\r\n<img data-opt-id=60101124  fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/1\/1e\/Sonex_teros.jpg\/800px-Sonex_teros.jpg\" alt=\"Sonex Teros aircraft in flight\" style=\"max-width:100%;height:auto;border-radius:6px\">\r\n<figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">The Sonex Teros. Elegant, efficient, and now\u2014unsupported. (Photo: Wikimedia Commons)<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n## What Doesn&#8217;t Die\r\n\r\nThe Sonex won&#8217;t disappear. Aircraft don&#8217;t evaporate when factories close. They&#8217;re physical objects with tremendous value and utility. Mechanics will still maintain them. Builders will still support each other through online forums. The airplanes will still fly.\r\n\r\nBut something is lost when a factory closes: the institutional knowledge. The voice of the creator saying, &#8220;Here&#8217;s why we designed it this way.&#8221; The ability to order new parts that are guaranteed to fit. The certainty that if you build something from this blueprint, you&#8217;re following the vision of someone who&#8217;s perfected it over decades.\r\n\r\n<p>The experimental aviation community will remember Sonex. The aircraft will fly for another 30, 40, 50 years if their owners maintain them with care. But the dream of buying a kit, building it with friends, and knowing the creator was there if you needed guidance\u2014that dream is now in someone else&#8217;s hands.<\/p>\r\n\r\n<p>If you fly a Sonex today, treasure it. The factory is gone, but the airplane is forever.<\/p>","protected":false},"excerpt":{"rendered":"<p>Quick Facts: Sonex Closure Closure Date Late March 2026, effective immediately Aircraft Affected ~700 Sonex, Waiex, and Onex aircraft worldwide Location Oshkosh, Wisconsin Owner Mark Schaible (purchased 2022) Founded John Monnett (1990s), Oshkosh, WI Reason &#8220;Perfect storm&#8221;\u2014bank pressure, sales decline, used aircraft competition Personal Impact Owner and wife filed personal bankruptcy One day you&#8217;re a [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":162251,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Sonex Aircraft closes","_yoast_wpseo_title":"Sonex Aircraft Closes Its Doors: Kit Plane Builder Gone | MiGFlug","_yoast_wpseo_metadesc":"Sonex Aircraft has shut down with zero warning, leaving 700 homebuilt aircraft without factory support. Owner Mark Schaible and his wife filed for personal bankruptcy.","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","editor_notices":[],"footnotes":""},"categories":[670],"tags":[],"class_list":["post-161601","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sonex Aircraft Closes Its Doors: Kit Plane Builder Gone | MiGFlug<\/title>\n<meta name=\"description\" content=\"Sonex Aircraft has shut down with zero warning, leaving 700 homebuilt aircraft without factory support. 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