{"id":83696,"date":"2023-08-01T18:16:59","date_gmt":"2023-08-01T18:16:59","guid":{"rendered":"https:\/\/one.sightlinemg.com\/airforcetimes\/uncategorized\/2023\/08\/01\/adaptive-engine-work-feeds-sixth-gen-fighter-design-says-us-air-force\/"},"modified":"2026-08-08T00:56:40","modified_gmt":"2026-08-08T00:56:40","slug":"adaptive-engine-work-feeds-sixth-gen-fighter-design-says-us-air-force","status":"publish","type":"post","link":"https:\/\/one.sightlinemg.com\/airforcetimes\/news\/your-air-force\/2023\/08\/01\/adaptive-engine-work-feeds-sixth-gen-fighter-design-says-us-air-force\/","title":{"rendered":"Adaptive engine work feeds sixth-gen fighter design, says US Air Force"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">DAYTON, Ohio \u2014 The future of the U.S. military\u2019s <a href=\"https:\/\/www.defensenews.com\/air\/2022\/07\/15\/the-f-35-engine-is-at-a-crossroads-with-billions-of-dollars-for-industry-at-stake\/\" target=\"_blank\">Adaptive Engine Transition Program<\/a> is still up in the air, but one service is trying to fold the effort\u2019s technological innovations into an advanced jet\u2019s propulsion system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a Tuesday roundtable with reporters in Dayton, Ohio, John Sneden, director of the Air Force\u2019s propulsion directorate, outlined ways his organization is working to adapt AETP features into the future <a href=\"https:\/\/www.defensenews.com\/air\/2023\/05\/18\/us-air-force-plans-to-award-next-generation-air-dominance-deal-in-2024\/\" target=\"_blank\">Next Generation Air Dominance<\/a> platform\u2019s engines.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That propulsion system, dubbed Next Generation Adaptive Propulsion, or NGAP, is in a preliminary design phase, Sneden said at the Air Force\u2019s Life Cycle Industry Days event. Within the next few years, he added, NGAP should be ready to move into prototyping and testing, having learned multiple lessons from the previous work on AETP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Pentagon has researched <a href=\"https:\/\/www.defensenews.com\/air\/2022\/07\/15\/the-f-35-engine-is-at-a-crossroads-with-billions-of-dollars-for-industry-at-stake\/\" target=\"_blank\">adaptive engine technology through AETP<\/a> since 2016 as a possible replacement for the F-35 Joint Strike Fighter\u2019s current engine. GE Aerospace as well as Pratt &amp; Whitney \u2014 the latter makes the F-35\u2032s current F135 engine \u2014 developed their own adaptive engines and are continuing to work on NGAP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In its March budget request, the Pentagon announced it had instead decided to stick with the F135 engines and upgrade them to provide more power and cooling for the F-35. The Pentagon\u2019s proposed budget requested no money for the alternative AETP option.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But some lawmakers have since <a href=\"https:\/\/www.defensenews.com\/air\/2023\/06\/13\/draft-house-bill-would-restore-funding-for-next-gen-fighter-engine\/\" target=\"_blank\">moved to restore funding for AETP<\/a> so the military can continue developing this technology for use in advanced fighter systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NGAP is fully funded in the Air Force\u2019s proposed fiscal 2024 budget, with the department requesting $595 million \u2014 an increase of $375 million over fiscal 2023.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If AETP is not funded in FY24, Sneden said, the Air Force will shift its remaining AETP budget and activities to NGAP. Those include ongoing work developing controls for AETP\u2019s adaptive fan, cooling technologies and advanced materials, many of which will form crucial elements of NGAD\u2019s eventual engine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sneden said AETP\u2019s adaptive element \u2014 allowing the engine to rapidly shift to the configuration that would provide the best thrust and efficiency for a certain situation \u2014 and the use of advanced composite materials, which can withstand much higher temperatures, for turbines and other components will be central to NGAP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But it\u2019s still undecided as to whether the NGAD\u2019s engine will use the third stream of air that is another part of the AETP design, he said.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While the technology used in both AETP and NGAP will be largely the same, Sneden explained, the future NGAD\u2019s engines will be sized differently from those of the F-35. That means elements of AETP would have to be resized and redesigned to be suitable for NGAD.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cWe\u2019ll be able to port that tech over,\u201d Sneden said. \u201cIt\u2019s not a one-for-one; you can\u2019t just pull it off of the F-35 and move it directly over to NGAD in its current state.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While GE Aerospace and Pratt &amp; Whitney develop the new fighter\u2019s engines, Sneden noted, the potential designers of the NGAD airframe are also working closely with them to ensure the engines will fit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Air Force last year also awarded contracts worth nearly $1 billion each to aircraft manufacturers Boeing, Lockheed Martin and Northrop Grumman to work on prototyping NGAD engines, although Northrop in July confirmed it would not bid as a prime contractor on NGAD. The Air Force issued a solicitation for NGAD in May, and it plans to make an award in 2024.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cWe are making one design that will \u2026 fit into any of the [airframe] designs\u201d for NGAD, Sneden said. \u201cLater on, as we downselect and figure out who the final vendor is, there could be some optimization of that system and that particular design. But they\u2019re all designing and moving around the propulsion constraints that we\u2019ve studied and evaluated and provided to each.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">AETP testing that already occurred has been tremendously useful for NGAP, Sneden said.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cBecause of the data that we\u2019ve received off of that, we actually understand how the adaptive engine technology works,\u201d Sneden explained. \u201cWe understand the types of changes that we need to make, and we can incorporate that into the baseline for NGAD.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It will be crucial for the United States to redouble its efforts toward developing new and innovative propulsion systems, Sneden noted. Since about 2015, China has made considerable advancements of its own on propulsion, and is starting to catch up.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cWe are losing our propulsion lead to China, which is investing heavily and developing and producing effective propulsion technologies,\u201d Sneden said. \u201cWe have to maintain that propulsion edge.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Air Force is adapting AETP features into the future Next Generation Air Dominance platform\u2019s engines.<\/p>\n","protected":false},"author":7,"featured_media":114798,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_canonical":"","_acf":"","_yoast_wpseo_primary_category":67,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","_smg_distribution_targets":[]},"categories":[101,16,26,67],"tags":[],"coauthors":[3320],"class_list":["post-83696","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-daily-news-roundup","category-news","category-newsletters","category-your-air-force"],"acf":{"subheadline":"","legacy_arc_id":"R4KXNTRHHFGMRDBRXQS5CNEUEE","arc_canonical_url":"\/air\/2023\/08\/01\/adaptive-engine-work-feeds-sixth-gen-fighter-design-says-us-air-force\/","remove_feature_photo":false,"is_sponsored":false,"subtype":"","redirect_url":"","disable_inline_ads":false,"native_logo_pretext":"Presented 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