{"id":236016,"date":"2014-12-23T22:29:00","date_gmt":"2014-12-23T22:29:00","guid":{"rendered":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg"},"modified":"2023-03-17T15:03:57","modified_gmt":"2023-03-17T19:03:57","slug":"where-are-they-now-x-1b","status":"inherit","type":"attachment","link":"https:\/\/www.nasa.gov\/image-detail\/where-are-they-now-x-1b\/","title":{"rendered":"Where Are They Now: X-1B"},"author":9,"comment_status":"closed","ping_status":"closed","template":"","meta":{"nasa_hds_core_meta_l10n":"en-US","nasa_hds_core_meta_article_editor":"","nasa_hds_core_meta_article_contacts":[],"nasa_hds_core_meta_article_topic":"","nasa_hds_core_meta_linked_locations":[],"nasa_hds_core_meta_article_related_articles":[],"hds_migrate_meta_pr_release_id":"","hds_migrate_meta_pr_release_type":"","nasa_hds_core_meta_location_x":"","nasa_hds_core_meta_location_y":"","nasa_hds_core_meta_gallery_images":[],"nasa_hds_core_meta_video_cc_file_id":"","nasa_hds_core_meta_audio_cc_file_id":""},"media-tags":[10822],"read_time":2,"video_cc_url":"","audio_cc_url":"","credits":"","original_date":{"stamp":0,"display":""},"description":{"rendered":"<p class=\"attachment\"><a href='https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"235\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=300\" class=\"attachment-medium size-medium\" alt=\"X-1B on lakebed.\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg 1041w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?resize=300,235 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?resize=768,602 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?resize=1024,803 1024w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?resize=400,314 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?resize=600,470 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?resize=900,705 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>The second generation X-1s used the same wing, horizontal tail, and XLR-11 rocket engine as the first generation aircraft, with a new cylindrical fuselage just over 4 1\/2 feet longer than the original design. This was the maximum length that could be carried by a B-29 or B-50 launch aircraft. The cockpit design was also changed to a “stepped” canopy, allowing the pilot to enter from the top, instead of the side hatch on the original X-1. A more significant change was the fuel system. The new aircraft used a low-pressure turbopump, which eliminated the heavy spherical liquid oxygen (LOX) and alcohol tanks. The new, larger tanks now conformed to the fuselage shape. As a result, the airplane’s calculated maximum performance had increased to Mach 2.47 at 70,000 feet.<\/p>\n<p>Four of the second generation X-1s were originally to be built by Bell Aircraft: the X-1A for dynamic stability tests; the X-1B for air load research; the X-1C for armaments tests using a .50 cal. machine gun in the nose and a gun sight for the pilot; and the X-1D for heat transfer research. The X-1C was canceled while in the mockup stage…<a href=\"\/centers\/armstrong\/news\/FactSheets\/FS-082-DFRC.html\">Learn more<\/a><\/p>\n<p>The X-1B made its last flight in January of 1958 and was transferred to the <a href=\"http:\/\/www.nationalmuseum.af.mil\/Visit\/MuseumExhibits\/FactSheets\/Display\/tabid\/509\/Article\/195763\/bell-x-1b.aspx\" rel=\"noopener\">National Museum of the United States Air Force<\/a> in Dayton, Ohio in 1959.<\/p>\n"},"caption":{"rendered":"<p>The second generation X-1s used the same wing, horizontal tail, and XLR-11 rocket engine as the first generation aircraft, with a new cylindrical fuselage just over 4 1\/2 feet longer than the original design. This was the maximum length that could be carried by a B-29 or B-50 launch aircraft.<\/p>\n"},"alt_text":"X-1B on lakebed.","media_type":"image","mime_type":"image\/jpeg","media_details":{"width":1041,"height":816,"file":"2023\/03\/340710main_E-4097_full.jpg","filesize":122633,"sizes":{"thumbnail":{"file":"340710main_E-4097_full.jpg?resize=150,150","width":150,"height":150,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=150&h=150&crop=1"},"medium":{"file":"340710main_E-4097_full.jpg?resize=300,235","width":300,"height":235,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=300"},"medium_large":{"file":"340710main_E-4097_full.jpg?resize=768,602","width":768,"height":602,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=1024"},"large":{"file":"340710main_E-4097_full.jpg?resize=1024,803","width":1024,"height":803,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=1024"},"thumbnail-sm":{"file":"340710main_E-4097_full.jpg?resize=50,50","width":50,"height":50,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=50&h=50&crop=1"},"thumbnail-md":{"file":"340710main_E-4097_full.jpg?resize=100,100","width":100,"height":100,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=100&h=100&crop=1"},"thumbnail-lg":{"file":"340710main_E-4097_full.jpg?resize=200,200","width":200,"height":200,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=200&h=200&crop=1"},"card-xsm":{"file":"340710main_E-4097_full.jpg?resize=400,314","width":400,"height":314,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=400"},"card-sm":{"file":"340710main_E-4097_full.jpg?resize=600,470","width":600,"height":470,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=600"},"card-md":{"file":"340710main_E-4097_full.jpg?resize=900,705","width":900,"height":705,"filesize":122633,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg?w=900"},"full":{"file":"340710main_E-4097_full.jpg","width":1024,"height":803,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg"}},"image_meta":{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0","keywords":[]},"credits":"","original_date":{"stamp":0,"display":""}},"post":null,"source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/340710main_E-4097_full.jpg","_links":{"self":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media\/236016"}],"collection":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media"}],"about":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/types\/attachment"}],"author":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/users\/9"}],"wp:term":[{"taxonomy":"media-tags","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media-tags?post=236016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}