{"id":5507,"date":"2018-02-12T07:43:55","date_gmt":"2018-02-12T07:43:55","guid":{"rendered":"http:\/\/www.theblackvault.com\/documentarchive\/?p=5507"},"modified":"2018-02-13T17:01:10","modified_gmt":"2018-02-13T17:01:10","slug":"advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis","status":"publish","type":"post","link":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/","title":{"rendered":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis"},"content":{"rendered":"<h3>Background<\/h3>\n<p>According to the report:<\/p>\n<p style=\"padding-left: 30px;\"><em><strong>&#8220;This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated a select number of credible far-term breakthrough propulsion physics concepts pertaining to R&amp;D work done on or related to gravity\/inertia modification, spacetime metric modification, and the extraction of energy from the space vacuum environment. The results of the study are presented and summarized in this report. A combined bibliography of advanced propulsion references was assembled and is presented. <\/strong><\/em><\/p>\n<p style=\"padding-left: 30px;\"><em><strong>The report includes an overview of the recent history and present state-of-the-art of ETO launch vehicle and propulsion concepts. Also included is an outline and summary of the criteria and operative guidelines that the author used to examine, select and recommend advanced propulsion concepts. The author identified and selected five promising advanced propulsion concepts, and provides a detailed technical evaluation of their breakthrough potential for ETO propulsion.&#8221;<\/strong><\/em><\/p>\n<h3>Document Archive<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.theblackvault.com\/images\/pdf.gif\" \/>\u00a0<a href=\"https:\/\/documents.theblackvault.com\/documents\/dtic\/a426465.pdf\">Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis<\/a> [103 Pages, 4MB]<\/p>\n<p>https:\/\/documents.theblackvault.com\/documents\/dtic\/a426465.pdf<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Background According to the report: &#8220;This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated<\/p>\n","protected":false},"author":1,"featured_media":5508,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"episode_type":"","audio_file":"","transcript_file":"","podmotor_file_id":"","podmotor_episode_id":"","cover_image":"","cover_image_id":"","duration":"","filesize":"","filesize_raw":"","date_recorded":"","explicit":"","block":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[6],"tags":[1160,1159,1161,1158],"class_list":["post-5507","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-advanced-propulsion","tag-afrl","tag-air-force-research-laboratory","tag-dr-eric-davis"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"Background According to the report: &quot;This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"John Greenewald\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"The Black Vault - Discover the Truth\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault\" \/>\n\t\t<meta property=\"og:description\" content=\"Background According to the report: &quot;This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"1377\" \/>\n\t\t<meta property=\"og:image:height\" content=\"665\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2018-02-12T07:43:55+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2018-02-13T17:01:10+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Background According to the report: &quot;This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#blogposting\",\"name\":\"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault\",\"headline\":\"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis\",\"author\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#organization\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/wp-content\\\/uploads\\\/2018\\\/02\\\/2018-02-11_23-43-07.jpg\",\"width\":1377,\"height\":665},\"datePublished\":\"2018-02-12T07:43:55+00:00\",\"dateModified\":\"2018-02-13T17:01:10+00:00\",\"inLanguage\":\"en-US\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#webpage\"},\"articleSection\":\"Science, advanced propulsion, AFRL, Air Force Research Laboratory, Dr. Eric Davis\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/science\\\/#listItem\",\"name\":\"Science\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/science\\\/#listItem\",\"position\":2,\"name\":\"Science\",\"item\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/science\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#listItem\",\"name\":\"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#listItem\",\"position\":3,\"name\":\"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/science\\\/#listItem\",\"name\":\"Science\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#organization\",\"name\":\"The Black Vault\",\"description\":\"Discover the Truth\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/#author\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/\",\"name\":\"John Greenewald\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#authorImage\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/49e167a0fd63564e8d54fa9b2ee5f1c9c4e6808ec394e8da6d328f5733c76582?s=96&d=mm&r=g\",\"width\":96,\"height\":96,\"caption\":\"John Greenewald\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#webpage\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/\",\"name\":\"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault\",\"description\":\"Background According to the report: \\\"This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#breadcrumblist\"},\"author\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/#author\"},\"creator\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/#author\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/wp-content\\\/uploads\\\/2018\\\/02\\\/2018-02-11_23-43-07.jpg\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#mainImage\",\"width\":1377,\"height\":665},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\\\/#mainImage\"},\"datePublished\":\"2018-02-12T07:43:55+00:00\",\"dateModified\":\"2018-02-13T17:01:10+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#website\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/\",\"name\":\"The Black Vault\",\"description\":\"Discover the Truth\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault","description":"Background According to the report: \"This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated","canonical_url":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BlogPosting","@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#blogposting","name":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault","headline":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis","author":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/#author"},"publisher":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/#organization"},"image":{"@type":"ImageObject","url":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg","width":1377,"height":665},"datePublished":"2018-02-12T07:43:55+00:00","dateModified":"2018-02-13T17:01:10+00:00","inLanguage":"en-US","mainEntityOfPage":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#webpage"},"isPartOf":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#webpage"},"articleSection":"Science, advanced propulsion, AFRL, Air Force Research Laboratory, Dr. Eric Davis"},{"@type":"BreadcrumbList","@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive#listItem","position":1,"name":"Home","item":"https:\/\/www.theblackvault.com\/documentarchive","nextItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/science\/#listItem","name":"Science"}},{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/science\/#listItem","position":2,"name":"Science","item":"https:\/\/www.theblackvault.com\/documentarchive\/category\/science\/","nextItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#listItem","name":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis"},"previousItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#listItem","position":3,"name":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis","previousItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/science\/#listItem","name":"Science"}}]},{"@type":"Organization","@id":"https:\/\/www.theblackvault.com\/documentarchive\/#organization","name":"The Black Vault","description":"Discover the Truth","url":"https:\/\/www.theblackvault.com\/documentarchive\/"},{"@type":"Person","@id":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/#author","url":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/","name":"John Greenewald","image":{"@type":"ImageObject","@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#authorImage","url":"https:\/\/secure.gravatar.com\/avatar\/49e167a0fd63564e8d54fa9b2ee5f1c9c4e6808ec394e8da6d328f5733c76582?s=96&d=mm&r=g","width":96,"height":96,"caption":"John Greenewald"}},{"@type":"WebPage","@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#webpage","url":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/","name":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault","description":"Background According to the report: \"This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/#website"},"breadcrumb":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#breadcrumblist"},"author":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/#author"},"creator":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/#author"},"image":{"@type":"ImageObject","url":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg","@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#mainImage","width":1377,"height":665},"primaryImageOfPage":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/#mainImage"},"datePublished":"2018-02-12T07:43:55+00:00","dateModified":"2018-02-13T17:01:10+00:00"},{"@type":"WebSite","@id":"https:\/\/www.theblackvault.com\/documentarchive\/#website","url":"https:\/\/www.theblackvault.com\/documentarchive\/","name":"The Black Vault","description":"Discover the Truth","inLanguage":"en-US","publisher":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/#organization"}}]},"og:locale":"en_US","og:site_name":"The Black Vault - Discover the Truth","og:type":"article","og:title":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault","og:description":"Background According to the report: &quot;This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated","og:url":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/","og:image":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg","og:image:secure_url":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg","og:image:width":1377,"og:image:height":665,"article:published_time":"2018-02-12T07:43:55+00:00","article:modified_time":"2018-02-13T17:01:10+00:00","twitter:card":"summary_large_image","twitter:title":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis - The Black Vault","twitter:description":"Background According to the report: &quot;This study was tasked with the purpose of conducting a thorough literature and program search to carry out and document a technical assessment of the latest concepts in science and engineering that show promise of leading to a major advance in Earth-to-orbit (ETO) propulsion. The study also reviewed and evaluated","twitter:image":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg"},"aioseo_meta_data":{"post_id":"5507","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"breadcrumb_settings":null,"limit_modified_date":false,"ai":null,"created":"2023-04-05 20:14:30","updated":"2025-06-18 22:45:55","seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.theblackvault.com\/documentarchive\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.theblackvault.com\/documentarchive\/category\/science\/\" title=\"Science\">Science<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tAdvanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/www.theblackvault.com\/documentarchive"},{"label":"Science","link":"https:\/\/www.theblackvault.com\/documentarchive\/category\/science\/"},{"label":"Advanced Propulsion Study, Air Force Research Laboratory, September 2004 by Dr. Eric W. Davis","link":"https:\/\/www.theblackvault.com\/documentarchive\/advanced-propulsion-study-air-force-research-laboratory-september-2004-dr-eric-w-davis\/"}],"jetpack_featured_media_url":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2018\/02\/2018-02-11_23-43-07.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/posts\/5507","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/comments?post=5507"}],"version-history":[{"count":0,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/posts\/5507\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/media\/5508"}],"wp:attachment":[{"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/media?parent=5507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/categories?post=5507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/tags?post=5507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}