{"id":5910146,"date":"2026-07-17T11:49:32","date_gmt":"2026-07-17T09:49:32","guid":{"rendered":"https:\/\/migflug.com\/jetflights\/?p=5910146"},"modified":"2026-07-22T09:31:02","modified_gmt":"2026-07-22T07:31:02","slug":"douglas-dc-8-premier-avion-de-ligne-a-franchir-le-mur-du-son-en-1961","status":"publish","type":"post","link":"https:\/\/migflug.com\/jetflights\/fr\/douglas-dc-8-first-airliner-broke-sound-barrier-1961\/","title":{"rendered":"Le seul avion de ligne \u00e0 avoir franchi le mur du son"},"content":{"rendered":"<p><style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style><\/p>\r\n<p>Demandez \u00e0 n&#039;importe qui quel avion de ligne a franchi le mur du son en premier, et il vous r\u00e9pondra le Concorde. Il se trompera de sept ans, et d&#039;un avion Douglas d&#039;apparence tout \u00e0 fait ordinaire que la plupart des gens ont compl\u00e8tement oubli\u00e9.<\/p>\r\n<p>Le 21 ao\u00fbt 1961, un Douglas DC-8 standard \u2013 le m\u00eame quadrir\u00e9acteur qui transportait les vacanciers \u00e0 travers l&#039;Atlantique \u2013 fut d\u00e9lib\u00e9r\u00e9ment pouss\u00e9 \u00e0 Mach 1 lors d&#039;un piqu\u00e9 vertigineux au-dessus du d\u00e9sert californien. Il demeure, avec le Concorde et le Tu-144 sovi\u00e9tique, le seul avion de ligne conventionnel \u00e0 avoir franchi le mur du son intentionnellement.<\/p>\r\n\r\n<div style=\"background: #f5f5f5; padding: 20px; border-radius: 8px; margin: 24px 0;\">\r\n<p style=\"margin: 0 0 10px; font-weight: bold; font-size: 15px; letter-spacing: .03em; color: #111;\">FAITS RAPIDES<\/p>\r\n<table style=\"border-collapse: collapse; font-size: 15px; line-height: 1.5;\">\r\n<tbody>\r\n<tr>\r\n<td style=\"padding: 6px 12px 6px 0; font-weight: 600; color: #333; vertical-align: top; white-space: nowrap;\">Date<\/td>\r\n<td style=\"padding: 6px 0; color: #444;\">21 ao\u00fbt 1961<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"padding: 6px 12px 6px 0; font-weight: 600; color: #333; vertical-align: top; white-space: nowrap;\">A\u00e9ronef<\/td>\r\n<td style=\"padding: 6px 0; color: #444;\">Douglas DC-8-43, immatriculation N9604Z (\"\u00a0Empress of Montreal\u00a0\")<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"padding: 6px 12px 6px 0; font-weight: 600; color: #333; vertical-align: top; white-space: nowrap;\">vitesse maximale<\/td>\r\n<td style=\"padding: 6px 0; color: #444;\">Mach 1,012 (environ 1\u00a0062 km\/h) \u00e0 environ 12\u00a0500 m\u00e8tres d&#039;altitude, en piqu\u00e9<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"padding: 6px 12px 6px 0; font-weight: 600; color: #333; vertical-align: top; white-space: nowrap;\">Temps supersonique<\/td>\r\n<td style=\"padding: 6px 0; color: #444;\">~16 secondes<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"padding: 6px 12px 6px 0; font-weight: 600; color: #333; vertical-align: top; white-space: nowrap;\">Pilote<\/td>\r\n<td style=\"padding: 6px 0; color: #444;\">William M. Magruder (pilote d&#039;essai en chef de Douglas)<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"padding: 6px 12px 6px 0; font-weight: 600; color: #333; vertical-align: top; white-space: nowrap;\">Op\u00e9rateur<\/td>\r\n<td style=\"padding: 6px 0; color: #444;\">Livr\u00e9 \u00e0 Canadian Pacific Air Lines, novembre 1961<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>\r\n\r\n<h2 style=\"padding-top: 22px;\">Un test, pas une cascade.<\/h2>\r\n<p>Ce vol avait un objectif crucial. Douglas souhaitait obtenir des donn\u00e9es d&#039;essais en vol sur une nouvelle conception de bord d&#039;attaque d&#039;aile, et pousser le DC-8 \u00e0 ses limites \u00e9tait le meilleur moyen d&#039;y parvenir. Mais il y avait aussi une dimension spectaculaire\u00a0: Magruder voulait prouver que son avion de ligne pouvait franchir Mach 1 et, au passage, d\u00e9tourner l&#039;attention de son principal concurrent, le Boeing 707.<\/p>\r\n<p>Le plan \u00e9tait audacieux. Faire monter un avion de ligne flambant neuf \u00e0 environ 15\u00a0850 m\u00e8tres d&#039;altitude \u2014 un record pour un avion commercial \u2014 puis le faire piquer du nez et laisser la gravit\u00e9 faire le reste. Des avions d&#039;assistance \u00e9taient pr\u00e9sents pour filmer la sc\u00e8ne, dont un F-104 Starfighter pilot\u00e9, semble-t-il, par Chuck Yeager, un vieil ami de Magruder.<\/p>\r\n\r\n<div style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; margin: 24px 0;\"><iframe class=\"skip-lazy\" style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; border-radius: 8px;\" src=\"https:\/\/www.youtube.com\/embed\/22JxpglgRuY\" allowfullscreen=\"allowfullscreen\" data-no-lazy=\"1\"><\/iframe><\/div>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin: 0 0 24px;\"><img data-opt-id=1872460769  fetchpriority=\"high\" decoding=\"async\" class=\"skip-lazy\" style=\"max-width: 100%; height: auto; border-radius: 6px;\" src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:0e0_.b970\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/migflug.com\/jetflights\/wp-content\/uploads\/sites\/4\/2026\/07\/f-104-starfighter-chase-plane.jpg\" alt=\"Avion de chasse F-104 Starfighter\" data-no-lazy=\"1\" \/>\r\n<figcaption style=\"font-size: 13px; color: #777; text-align: center; margin-top: 6px; font-style: italic;\">Un F-104 Starfighter du type de ceux qui ont assur\u00e9 la poursuite du DC-8 supersonique, pilot\u00e9, semble-t-il, par Chuck Yeager. Photo\u00a0: NASA \/ Wikimedia Commons<\/figcaption>\r\n<\/figure>\r\n\r\n<h2 style=\"padding-top: 22px;\">Seize secondes \u2014 et une frayeur<\/h2>\r\n<p>Alors que le DC-8 piquait du nez, l&#039;aiguille de Mach a d\u00e9pass\u00e9 1,0 et s&#039;y est maintenue pendant environ 16 secondes. L&#039;ing\u00e9nieur d&#039;essais en vol Richard Edwards, \u00e0 bord de l&#039;appareil, se souvenait tr\u00e8s bien de ce moment des d\u00e9cennies plus tard.<\/p>\r\n\r\n<div style=\"background: #f8f9fa; border-left: 4px solid  #1565c0; padding: 20px 22px; margin: 18px 0 24px; border-radius: 0 8px 8px 0; font-size: 16px; line-height: 1.7; display: flex; gap: 20px; align-items: flex-start;\">\r\n<div><em>\u201c\u00a0Lors du piqu\u00e9, \u00e0 environ 13\u00a0700 m\u00e8tres d\u2019altitude, l\u2019appareil a atteint Mach 1,01 pendant peut-\u00eatre 16 secondes, puis il a repris le contr\u00f4le. Mais la r\u00e9cup\u00e9ration a \u00e9t\u00e9 un peu effrayante.\u00a0\u201d<\/em>\r\n<div style=\"margin-top: 10px; font-size: 14px; color: #555;\"><strong>Richard H. Edwards<\/strong> \u2014 Ing\u00e9nieur d&#039;essais en vol du DC-8, Smithsonian Air &amp; Space (2011)<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n<p>Effrayant est le mot juste. Lors du piqu\u00e9, les gouvernes de profondeur ont perdu leur adh\u00e9rence et le moteur du stabilisateur a cal\u00e9 sous l&#039;\u00e9norme charge a\u00e9rodynamique\u00a0; pendant quelques secondes, l&#039;avion a refus\u00e9 de se redresser. La solution de Magruder fut un pur coup de sang de pilote d&#039;essai\u00a0: il a pouss\u00e9 <em>plus loin<\/em> Il amor\u00e7a le piqu\u00e9 pour d\u00e9sengager l&#039;empennage horizontal, ce qui lui permit de reprendre le contr\u00f4le et de remettre le DC-8 \u00e0 niveau. Tout au long de l&#039;op\u00e9ration, il resta imperturbable, comme chacun sait.<\/p>\r\n\r\n<div style=\"background: #f8f9fa; border-left: 4px solid  #1565c0; padding: 20px 22px; margin: 18px 0 24px; border-radius: 0 8px 8px 0; font-size: 16px; line-height: 1.7; display: flex; gap: 20px; align-items: flex-start;\">\r\n<div><em>\u201c Eh bien, nous pouvons d\u00e9coller sans volets et l&#039;avion s&#039;en sortira \u2014 si nous ne perdons pas de moteur. \u201d<\/em>\r\n<div style=\"margin-top: 10px; font-size: 14px; color: #555;\"><strong>Guillaume Magruder<\/strong> \u2014 Pilote d&#039;essai en chef de Douglas, via Smithsonian Air &amp; Space<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin: 0 0 24px;\"><img data-opt-id=2048646420  fetchpriority=\"high\" decoding=\"async\" class=\"skip-lazy\" style=\"max-width: 100%; height: auto; border-radius: 6px;\" src=\"https:\/\/ml5psubhxdln.i.optimole.com\/cb:0e0_.b970\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/migflug.com\/jetflights\/wp-content\/uploads\/sites\/4\/2026\/07\/douglas-dc-8-43-variant.jpg\" alt=\"Un Douglas DC-8-43\" data-no-lazy=\"1\" \/>\r\n<figcaption style=\"font-size: 13px; color: #777; text-align: center; margin-top: 6px; font-style: italic;\">Un Douglas DC-8-43 \u2014 la m\u00eame version que le N9604Z, l&#039;avion qui a franchi le mur du son. Rien, en lui, ne laisse pr\u00e9sager un record. Photo\u00a0: Wikimedia Commons<\/figcaption>\r\n<\/figure>\r\n\r\n<p>Trois mois plus tard, le N9604Z a \u00e9t\u00e9 livr\u00e9 \u00e0 Canadian Pacific Air Lines et rebaptis\u00e9 <em>Imp\u00e9ratrice de Montr\u00e9al<\/em>, Il passa les deux d\u00e9cennies suivantes \u00e0 faire exactement ce que tous les autres DC-8 faisaient\u00a0: transporter des passagers. Son record supersonique tint jusqu\u2019au premier vol du Tu-144 en 1969.<\/p>\r\n<p>Aucune compagnie a\u00e9rienne n&#039;a jamais b\u00e2ti son succ\u00e8s sur des DC-8 supersoniques, bien s\u00fbr. Mais la prochaine fois que quelqu&#039;un vous dira que le Concorde a \u00e9t\u00e9 le premier avion de ligne \u00e0 franchir le mur du son, vous pourrez le corriger gentiment et lui raconter comment un avion de ligne ordinaire est parti \u00e0 la recherche de Mach 1 et l&#039;a atteint.<\/p>\r\n\r\n<div style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; margin: 24px 0;\"><iframe class=\"skip-lazy\" style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; border-radius: 8px;\" src=\"https:\/\/www.youtube.com\/embed\/pmlXT2edbqM\" allowfullscreen=\"allowfullscreen\" data-no-lazy=\"1\"><\/iframe><\/div>\r\n\r\n<p><em>Sources\u00a0: Smithsonian Air &amp; Space Magazine\u00a0; HistoryNet\u00a0; This Day in Aviation\u00a0; Wikip\u00e9dia.<\/em><\/p>\r\n\r\n<div style=\"background: #f0f4ff; border-left: 4px solid #5C91FF; padding: 16px 20px; margin: 32px 0 8px; border-radius: 0 8px 8px 0;\">\r\n<p style=\"margin: 0 0 8px; font-weight: 600; color: #333;\">Articles similaires<\/p>\r\n<p style=\"margin: 4px 0;\"><a href=\"https:\/\/migflug.com\/jetflights\/mach-2-60000-feet-and-a-view-of-the-curved-earth-the-legend-of-concorde\/\">Mach 2, 18 290 m\u00e8tres : La l\u00e9gende du Concorde<\/a><\/p>\r\n<p style=\"margin: 4px 0;\"><a href=\"https:\/\/migflug.com\/jetflights\/de-havilland-comet-metal-fatigue-square-windows-investigation-1954\/\">Le de Havilland Comet\u00a0: le magnifique jet qui nous a appris comment les avions freinent<\/a><\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Sept ans avant le Concorde, un Douglas DC-8 standard a \u00e9t\u00e9 d\u00e9lib\u00e9r\u00e9ment pouss\u00e9 au-del\u00e0 de Mach 1 \u2014 le seul avion de ligne conventionnel \u00e0 avoir jamais franchi le mur du son.<\/p>","protected":false},"author":27,"featured_media":5909981,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[665,666],"tags":[676],"class_list":["post-5910146","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation-world","category-history-and-legends","tag-priority-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Douglas DC-8: The Airliner That Broke the Sound Barrier<\/title>\n<meta name=\"description\" content=\"In 1961 a standard Douglas DC-8 broke the sound barrier in a dive \u2014 seven years before Concorde. 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