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Aerion Corporation was an American aircraft manufacturer based in Reno, Nevada. It was founded by Robert Bass of Fort Worth.[2]

Key Information

From 2004 until 2021, the company was developing a 10-passenger supersonic jet to cut transatlantic flights by three hours, using "boomless cruise" technology to negate the sonic boom.[3][4] It was expected to be the first supersonic aircraft without an afterburner to lower emissions, and the first to run on biofuels.[5][6]

Aerion abruptly announced on May 21, 2021, that the company would be shutting down due to inability to raise needed capital to proceed.[7]

History

[edit]

Aerion Corporation was founded in 2003 by Texas billionaire Robert Bass as a startup working to commercialize supersonic aviation technology.[2][8] The company began development on supersonic business jets in 2004.[9]

Increased demand from a variety of aircraft manufacturers for Aerion’s natural laminar flow (NLF) expertise drove the company to launch Aerion Technologies Corporation, a wholly owned subsidiary, in May 2011.[10][11][12] Aerion stated that the same proprietary technologies and design tools that enable a practical supersonic business jet also have subsonic and transonic applications. During the previous 10 years, Aerion had developed extensive NLF test data and methods for optimizing its application to aircraft design, as well as assuring practical manufacturing and operational use. Aerion Technologies’ NLF technology and design tools may also help airframe builders improve speed and efficiency limits for next-generation civil and military aircraft.[13][14][15]

In May 2015, Ernest Edwards, formerly president of Embraer Executive Jets, was appointed Aerion’s chief commercial officer, while previous Gulfstream G650 chief engineer Mike Hinderberger was promoted to senior vice president for aircraft development.[16]

In March 2018, Tom Vice, former president of Northrop Grumman's Aerospace Systems sector, was appointed President and COO. A year later, Vice also replaced Robert Bass as Chairman of the Board upon the announcement of a partnership between Boeing and Aerion.[17]

In April 2020, the company announced the construction of a $375 million production facility at the Melbourne Orlando International Airport and the relocation of its headquarters to the Aerion Park campus, with the hopes of the first commercial delivery of planes by 2027.[7][18] Aerion began development on carbon neutral capabilities for its AS2 jet through direct air capture in a 2020 deal with Carbon Engineering.[19] In July 2020, Aerion partnered with Jetex to establish travel arrangements for AS2 passengers.[20][21]

On May 21, 2021, at the time of its collapse, the company had 93 orders for the AS2 aircraft at a price of US$120 million, a backlog of $11.2 billion. Aerion had only a fraction of the US$4 billion it estimated would be needed to complete certification and commence production. The company said the customer deposits would be returned.[22][23]

In June 2021, Boeing CEO Dave Calhoun explained why it stopped supporting Aerion, stating that he asked, "is it going to be big enough and meaningful enough to Boeing? And maybe not just in terms of share of market and service market, but also in terms of return on capital? And does it bring any technology to our existing core business? And if it doesn't, then it's got to really stand on its own … And our decision on supersonic was that it didn't."[24]

Projects

[edit]

Aerion SBJ

[edit]
Main article: Aerion SBJ

The Aerion SBJ was a supersonic business jet project designed by Aerion.

Unveiled in 2004, the designer sought a joint venture with a business aircraft manufacturer anticipating a $1.2–1.4 billion development in 7–8 years.[25] Aerion received 50 letters-of-intent before enlarging the design as the Aerion AS2 in 2014.[26]

Powered by two Pratt & Whitney JT8D-219 engines, the $80 million aircraft would transport 8-12 passengers up to Mach 1.6 and up to 4,000 nmi (7,400 km).[25]

Aerion AS2

[edit]
Main article: Aerion AS2

The Aerion AS2 was announced in May 2014, as a larger Aerion SBJ redesign, targeting introduction after a seven year development period.[26] Aerion initially partnered with Airbus on the project in September 2014.[27] In December 2017, Airbus was replaced as a partner by Lockheed Martin.[28] Its General Electric Affinity engine for the AS2 was unveiled in October 2018.[29] In February 2019, Boeing replaced Lockheed Martin as a partner.[30]

The 12 passenger aircraft aimed for Mach 1.4 with a supersonic natural laminar flow wing for a minimum projected range of 4,750 nm (8,800 km).[27][31][32] It was designed to have flown at just below the sound barrier while flying over land in order to comply with supersonic flight restrictions.[18]

A $4 billion development cost was anticipated, for a market for 300 aircraft over 10 years and 500 aircraft overall, at $120 million each.[29] A preliminary design review was delayed until 2021 due to the COVID-19 pandemic.[33] Aerion had projected a $40 billion market for the AS2 with a $3.18 billion order backlog from companies such as Flexjet and discussions for orders valued at another $6.2 billion.[33]

Aerion AS3

[edit]

Aerion announced, in March 2021, a 50 seat hypersonic Mach 4 airliner project aimed to achieve a range of 7,000 km (3,800 nmi).[34] The company targeted commercial availability by 2029.[35]

See also

[edit]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Aerion

View on Grokipedia
from Grokipedia
Aerion Corporation was an American aerospace company founded in 2003 by Texas billionaire Robert Bass, specializing in the development of supersonic business jets to revive commercial supersonic travel. Based initially in Reno, Nevada, and later relocating its headquarters to Melbourne, Florida, the company aimed to overcome historical barriers to supersonic flight, such as sonic booms and high fuel consumption, through innovative design and technology. The company's flagship project was the , a announced in 2014 as an evolution of its earlier Supersonic Business Jet (SBJ) concept, designed to carry 8 to 12 passengers at speeds up to Mach 1.4 with a range of 4,750 nautical miles. In March 2021, Aerion also announced the AS3, a planned 50-passenger Mach 4+ commercial concept. Key innovations included the patented Boomless Cruise technology, which suppressed sonic booms to enable overland supersonic flight without violating noise regulations, and sustainable compatibility to reduce environmental impact. Aerion secured over $2 billion in commitments, including partnerships with for engineering support and for engines, and reported a backlog exceeding $10 billion by 2021, positioning the AS2 for certification in 2023 and entry into service by 2026. However, amid escalating development costs and a challenging climate for advanced projects, the company abruptly ceased operations on May 21, 2021, laying off its approximately 100 employees and marking the end of its efforts to commercialize quiet supersonic flight.

Company Overview

Founding and Leadership

Aerion Corporation was founded in by a group of industry professionals, including aerodynamicist Tracy, and backed by billionaire , with the aim of commercializing supersonic aviation technology for business jets. The company was established in , leveraging the region's aerospace-friendly environment and proximity to testing facilities. The company's leadership evolved to include key figures with extensive experience in . In March 2018, Tom was appointed president and chief operating officer, bringing over 30 years of expertise from roles such as president of Northrop Grumman's Systems sector. later became chairman, president, and CEO in August 2018, guiding Aerion's strategic direction. Richard Tracy served as founder, , and executive vice president of technology, contributing foundational technical leadership. Robert retained influence as chairman, providing ongoing financial and strategic support. Early concepts like the (SBJ) served as precursors to Aerion's projects. Aerion's vision centered on developing sustainable supersonic business jets capable of reviving commercial supersonic travel after the Concorde's retirement, with a strong emphasis on low-boom technology to enable overland supersonic flight without excessive noise. This approach aimed to address environmental and regulatory barriers, positioning supersonic travel as a premium option for time-sensitive business applications. In terms of operations, Aerion maintained its headquarters in , until announcing plans in 2020 to relocate to a $300 million campus at Orlando Melbourne International Airport (MLB) in , to support expanded manufacturing and testing. The move was intended to capitalize on Florida's ecosystem and create up to 675 jobs, though it was not completed due to the company's closure.

Mission and Goals

Aerion Supersonic targeted high-end business travelers seeking efficient long-haul connectivity, focusing on routes such as transatlantic and transpacific flights. The company's designs accommodated 8 to 12 passengers in a luxurious cabin configuration, emphasizing time savings through speeds exceeding Mach 1.4, which would reduce New York to flight times to approximately four hours. The primary goals centered on regulatory approval for overland supersonic operations, including FAA certification by suppressing sonic booms to inaudible levels over land using patented Boomless Cruise technology, enabling quieter flight profiles suitable for continental routes. Initially, Aerion aimed for entry into service between 2025 and 2027, with projected performance including a range of 4,200 to 5,500 nautical miles at Mach 1.4 cruise speed, supplemented by subsonic segments over land to comply with noise restrictions. These goals were planned prior to the company's closure in 2021. Sustainability commitments were integral to Aerion's vision, with pledges to incorporate 100% sustainable aviation fuels (SAF) in its systems and employ natural laminar flow (NLF) wing technology to achieve approximately 20% drag reduction, thereby lowering fuel consumption and emissions relative to comparable subsonic business jets. These initiatives, shaped by leadership including CEO Tom Vice, aimed to position supersonic travel as environmentally viable for premium markets.

Historical Development

Early Concepts and Formation

The early concepts for what would become Aerion Supersonic originated from research conducted by the ASSET Group, led by aerodynamicist Dr. Richard Tracy, in the late 1990s and early 2000s. This group focused on natural laminar flow technology applied to supersonic wings, aiming to enable efficient high-speed flight for smaller aircraft. Influenced by the retirement of the in 2003, which ended commercial supersonic passenger travel and highlighted the need for quieter, more efficient alternatives, billionaire acquired the ASSET Group's technology and team to revive civil supersonic aviation. In 2003, Bass formed Aerion Corporation in , as a startup dedicated to commercializing these supersonic technologies, initially centering on feasibility studies for a known as the SBJ. The company invested in preliminary design work, including sketches and conceptual renderings unveiled publicly in , which depicted an 8- to 12-passenger aircraft capable of Mach 1.6 over water routes. Early activities also encompassed and vendor outreach to validate the economic viability of such a jet, with an estimated development cost of $1.2 to $1.4 billion. Aerion faced significant early challenges from regulatory barriers, particularly the U.S. Federal Aviation Administration's 1973 ban on civil supersonic flight over land, imposed due to concerns following the era. This restriction limited potential markets to overwater routes, complicating business case projections for a jet intended for global executive travel. To address technical uncertainties, Aerion conducted testing of SBJ scale models starting in late at facilities in the U.S. and , gathering data on , stability, and performance under supersonic conditions. These tests confirmed key principles but underscored the need for further to mitigate and efficiency issues. By the early , Aerion had secured initial commitments from potential customers and partners, but funding remained elusive amid the regulatory landscape. The company persisted with low-profile studies until , when it announced the AS2—a refined of the SBJ concept—after attracting seed investment to advance engineering and partnerships.

Key Milestones and Partnerships

Aerion Supersonic showcased a of its AS2 at the 2016 National Business Aviation Association (NBAA) convention in , marking an early public milestone in advancing its ambitions. This event highlighted the company's transition from conceptual work to tangible design progress following its 2014 revival of the earlier SBJ project. By 2021, Aerion had expanded its workforce from a small team to approximately 160 employees, reflecting rapid operational scaling to support and development efforts. In October 2018, Aerion selected GE Aviation's Affinity engine to power the AS2, representing the first civil supersonic engine development in over 50 years and a pivotal partnership for propulsion technology. This was followed in February 2019 by a significant investment from , which provided financial, engineering, and manufacturing support while gaining board representation, though the investment amount remained undisclosed. That same month, was chosen to design and build the AS2's forward fuselage, with the agreement expanded in July 2020 to include additional composite structures for enhanced efficiency. Aerion also collaborated with starting in 2018 on a revolutionary and suite tailored for supersonic operations, including advanced displays and connectivity systems. A major infrastructure milestone occurred in December 2020 when Aerion broke ground on its $300 million Aerion Park headquarters and production facility at Orlando Melbourne International Airport in , intended as a hub for AS2 assembly and supplier integration. The prompted a delay in June 2020, shifting the AS2's first flight from 2023 to 2025 while preserving the core supplier network. By early 2021, Aerion's had grown to over 50 commitments valued at more than $10 billion, including options from for 20 units, underscoring market interest in the AS2 as a benchmark for sustainable supersonic travel.

Aircraft Projects

Aerion SBJ

The (Supersonic Business Jet) served as the foundational concept for Aerion Corporation's entry into supersonic , representing the company's initial vision for a private jet capable of efficient transoceanic travel. Unveiled in 2004 and actively developed through the mid-2010s, the SBJ was envisioned as a twin-engine designed to carry 8 passengers in a luxurious cabin while achieving sustained supersonic speeds over water routes, adhering to existing sonic boom regulations for overland subsonic flight. The SBJ's design emphasized aerodynamic efficiency through a low-boom configuration, featuring a slender and a trapezoidal delta-like wing optimized for supersonic natural to reduce drag. The aircraft's overall layout included a conventional and a compact suitable for operations, with a projected maximum speed of Mach 1.6 and a range of approximately 4,000 nautical miles. Key dimensions included a of approximately 135 feet, a of about 64 feet, and a (MTOW) of around 90,000 pounds. Propulsion was provided by two derated JT8D-219 engines, each delivering 19,600 pounds of , selected for their proven reliability and ability to support without afterburners. Development of the SBJ progressed through conceptual and testing phases from 2004 to 2016, focusing on validation of its core technologies. Wind tunnel testing, including low-speed evaluations at the University of Washington Aeronautical Laboratory, was conducted in 2014 to assess stability and control characteristics. Additional transonic and supersonic wind tunnel tests, in collaboration with NASA, confirmed the viability of the laminar flow wing design during 2014-2015. The SBJ was positioned as a technology demonstrator to prove key elements like efficient supersonic flight and low sonic boom, paving the way for production models. No full-scale prototype was ever constructed. By 2016, the SBJ concept had evolved into the larger Aerion AS2 design, incorporating customer feedback for increased capacity and range, effectively canceling the original SBJ as a standalone project. This progression influenced subsequent efforts by demonstrating scalable technologies.

Aerion AS2

The was a project announced in May 2014 as an evolution of the company's earlier Supersonic Business Jet (SBJ) concept, featuring a configuration to enable efficient overland supersonic flight. The design matured significantly in 2019 through key engineering partnerships, including a collaboration with to advance and systems integration. Originally targeting a first flight in 2023, the timeline was delayed to 2025 due to refinements in the and systems, with FAA planned for 2027 to support entry into service. The AS2 was engineered for 12 passengers in a spacious cabin with configurable lounges, achieving a cruise speed of Mach 1.4 (approximately 1,000 mph) while prioritizing fuel efficiency through without afterburners. Its maximum range was 4,200 nautical miles at Mach 1.4, enabling transatlantic and transpacific routes such as New York to in under four hours. The measured approximately 145 feet (44 m) in length with a of 79 feet (24 m) and a of around 130,000 pounds (59,000 kg), incorporating advanced composites for reduced weight and drag. A hallmark feature was its boomless overland flight capability, leveraging atmospheric Mach cutoff phenomena to limit sonic booms to acceptable levels up to Mach 1.2 over populated areas, potentially allowing supersonic operations within the pending regulatory approval. This was supported by order commitments, including purchase rights for 20 units secured by in March 2021, valued at over $2.4 billion and contributing to Aerion's backlog exceeding $10 billion. Subscale model testing for low-boom validation occurred at from 2018 to 2020, focusing on sonic signature propagation and ground noise metrics to inform the AS2's quiet supersonic design. These efforts built on earlier NASA collaborations, such as 2015 modeling contracts with to predict boom impacts and enable real-time flight planning.

Aerion AS3

The Aerion AS3 was a proposed supersonic commercial announced by Aerion Supersonic on March 29, 2021, designed to carry up to 50 passengers at speeds exceeding Mach 4, enabling significantly faster long-haul travel compared to conventional . The aircraft targeted a range of approximately 7,000 nautical miles (13,000 km), sufficient for transoceanic routes such as New York to in under two hours or to in about three hours, representing a potential reduction in flight times by over 60% on such journeys. This near-hypersonic performance was envisioned to usher in a new era of efficient, high-speed while adhering to overland supersonic restrictions through advanced noise mitigation technologies. The AS3 design was positioned as a scaled-up extension of Aerion's AS2 platform, incorporating shared innovations such as natural wings to reduce drag and fuel consumption at high speeds. Key features included a sleek, low-boom fuselage optimized for Mach 3-5 cruise, powered by yet-to-be-developed adaptive cycle engines in collaboration with partners like NASA Langley Research Center, which contributed to aerodynamic and propulsion studies. The concept emphasized sustainability, aiming for lower emissions per passenger than subsonic jets through efficient and lightweight composites, with initial customer input shaping the cabin layout for premium economy-style seating. At the time of its unveiling, the AS3 remained in the early conceptual phase, with no prototypes built and detailed studies ongoing to refine parameters. Aerion projected an entry into service in the early , building on the anticipated certification timeline of the AS2, though the project was ultimately halted following the company's closure in May 2021 due to funding challenges. Unlike Aerion's focus on the niche market with the AS2, the AS3 was specifically tailored for mainstream airline operations, targeting broader accessibility for high-volume routes while leveraging the same core supersonic technology stack.

Technological Features

Supersonic Design Innovations

Aerion's supersonic design innovations centered on overcoming key barriers to sustainable overland flight, including sonic booms, drag, and structural , through targeted aerodynamic shaping and material choices. These advancements were integral to the company's vision for environmentally compatible supersonic , emphasizing reduced and consumption without compromising performance. A cornerstone innovation was Boomless Cruise, a proprietary technology leveraging the Mach cutoff phenomenon to eliminate perceptible sonic booms on the ground during overland supersonic flight. This approach exploits of shockwaves in warmer, denser air layers at higher altitudes, allowing the aircraft to operate at speeds of Mach 1.1 to 1.2 without generating audible booms below. Validation came through extensive testing and collaboration with regulatory bodies like the FAA for overland certification pathways, enabling efficient transcontinental routes previously restricted by noise regulations. Complementing this was the adoption of Supersonic Natural Laminar Flow (SNLF) wing design, which promoted smooth airflow over the wing surfaces to minimize turbulence and drag. By tailoring the wing's pressure distribution and sweep, the SNLF configuration achieved approximately 20% lower drag compared to conventional supersonic wings, thereby extending range capabilities without increasing fuel burn. This was substantiated by a 2010 NASA flight test of a scaled wing section, confirming the potential for laminar flow at transonic and supersonic speeds. Engine placement further enhanced noise and signature management, with the AS2's rear fuselage-mounted turbofans positioned to direct exhaust upward, away from the ground during takeoff and landing. This configuration provided acoustic shielding by the , contributing to quieter operations compliant with subsonic standards, while also reducing the aircraft's by elevating hot exhaust plumes above the line. Structural efficiency was bolstered by extensive use of carbon fiber composites for the wings, , , and nacelles, enabling lighter airframes that supported the overall drag and noise reductions. These materials offered high strength-to-weight ratios, facilitating the thin, smooth surfaces essential for while maintaining structural integrity under supersonic loads. These innovations were primarily applied in the AS2 project, where they collectively aimed to deliver a 4,200 range at Mach 1.4 while meeting modern goals.

Engine and Aerodynamics

Aerion selected the GE Affinity turbofan engine to power its AS2 supersonic business jet, marking the first new civil supersonic engine design in over 50 years. This medium-bypass-ratio engine, developed in collaboration with GE Aviation, delivers approximately 20,000 pounds of thrust per engine in a three-engine configuration, enabling supercruise at Mach 1.4 without afterburners for efficient overwater operations. The Affinity incorporates a core derived from late-model CFM56 engines, adapted with a reduced number of compressor stages, a lower bypass ratio, and a twin-fan setup to balance subsonic and supersonic performance while meeting Stage 5 noise standards. Its non-augmented exhaust system avoids traditional afterburners entirely, prioritizing fuel efficiency and reduced emissions over takeoff boost. Aerodynamic development for the AS2 emphasized and supersonic efficiency through advanced (CFD) simulations, utilizing Reynolds-averaged Navier-Stokes solvers to optimize and shapes. These simulations, part of high-fidelity aerostructural optimizations, demonstrated drag reductions of up to 17.8% in conditions and 10.6% in supersonic cruise, translating to projected range improvements of over 50% in multipoint trade studies balancing subsonic and supersonic regimes. Key principles included curvature-constrained airfoil deformations and free-form optimizations to minimize while maintaining structural feasibility, with preliminary modeling highlighting the need for integrated low-drag installations to avoid interference penalties near the . Engine integration focused on streamlined designs to achieve low installed drag, positioning the engines at the rear for optimal and noise shielding during subsonic phases. Ground testing of the Affinity was planned for performance validation in 2020, but these efforts remained unrealized following Aerion's closure in 2021. The propulsion system's efficient thrust profile also supported synergies with low-boom shaping, aiding overland supersonic flight without ground sonic booms.

Closure and Legacy

Financial Challenges and Shutdown

Aerion Supersonic faced mounting financial pressures in the years leading up to its closure, exacerbated by the industry's downturn. By 2021, the company had secured s from key partners including , which made a significant undisclosed in 2019 to support development and aircraft design, and , which collaborated on development. Despite these contributions and an order backlog valued at $11.2 billion, Aerion struggled to raise the additional large-scale capital needed to advance production, aiming for at least $1 billion more amid a challenging climate. The severely impacted the aviation sector, reducing demand and investor confidence, which directly hindered Aerion's progress. Development costs for the AS2 had escalated to an estimated $4 billion overall, with approximately $1 billion already allocated to engine work alone. These rising expenses, combined with the broader economic fallout from the —including widespread layoffs across the industry—made securing further funding untenable. On May 21, 2021, Aerion announced the immediate cessation of operations, citing the inability to close on necessary capital in the prevailing financial environment. Following the shutdown, the company's assets, including and equipment, entered proceedings in September 2021 to settle creditor claims of approximately $100 million, with GE owed about $32 million. Bids for the assets were solicited through 2022, but no revival efforts have materialized as of 2025. In a poignant , the U.S. Federal Aviation Administration's longstanding ban on civil supersonic flights over land was addressed by an signed on June 6, 2025, directing the repeal of the 1973 regulation to enable quieter supersonic technologies. This development, while advancing the field for other players, arrived too late to benefit Aerion's defunct programs.

Influence on the Industry

Aerion's technological legacy in supersonic aviation has significantly advanced quiet flight research, particularly through its collaboration with under a focused on low-boom capabilities and high-speed point-to-point travel. This partnership enabled the sharing of advanced low-boom data, contributing to 's broader efforts in mitigation, including the development of the X-59 Quesst aircraft designed to produce a perceived noise level of around 75 PLdB on the ground. Additionally, Aerion's joint flight tests with on supersonic natural (NLF) wings, which demonstrated extensive runs to reduce drag and fuel consumption, have informed subsequent industry designs aimed at efficient, low-boom configurations. The company's work revived interest in sustainable supersonic travel by emphasizing carbon-neutral operations, including the use of sustainable aviation fuel (SAF) and boomless cruise technology over land to minimize environmental impact. Aerion secured over 50 orders for its AS2 , including a firm order from for 20 and purchase options from for another 20, alongside options from Avion Pacific, signaling strong market demand and validating the commercial viability of next-generation . These commitments, totaling billions in potential value, underscored investor confidence in supersonic solutions that balance speed with regulatory and sustainability requirements. Post-closure in 2021, Aerion's innovations continue to inspire successors like Boom Supersonic's Overture, targeted for commercial entry in 2029, which builds on the field's renewed focus on low-boom and efficient designs pioneered by Aerion. Hermeus's hypersonic projects also draw from the broader supersonic research ecosystem that Aerion helped cultivate. Aerion's pre-closure advocacy for regulatory reform played a key role in building industry momentum, accelerating the 2025 executive order lifting the U.S. ban on civil supersonic flights over land when sonic booms do not exceed acceptable noise thresholds. Furthermore, Aerion's publications and research on sonic boom metrics, such as PLdB for perceived noise levels, remain referenced in 2025 studies evaluating quiet supersonic transport viability.

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  52. https://www.npr.org/sections/coronavirus-live-updates/2020/10/28/928884032/citing-devastating-pandemic-impact-boeing-to-lay-off-7-000-more-workers
  53. https://www.bloomberg.com/news/articles/2021-09-07/ge-is-owed-32-million-as-supersonic-jet-maker-aerion-liquidates
  54. https://www.floridatoday.com/story/news/2021/09/01/aerion-supersonics-assets-sold-off-auction-after-company-shut-down-may/5680350001/
  55. https://www.globenewswire.com/news-release/2022/08/08/2494097/0/en/Bid-Deadline-Set-for-Aerion-Corporation-s-Assets.html
  56. https://www.whitehouse.gov/presidential-actions/2025/06/leading-the-world-in-supersonic-flight/
  57. https://www.reuters.com/business/aerospace-defense/trump-signs-orders-bolster-us-drone-defenses-boost-supersonic-flight-2025-06-06/
  58. https://ntrs.nasa.gov/api/citations/20140005927/downloads/20140005927.pdf
  59. https://robbreport.com/motors/aviation/netjets-aerion-20-supersonic-jets-order-1234599702/
  60. https://www.sherpareport.com/aircraft/flexjet-as2-order.html
  61. https://www.ainonline.com/aviation-news/business-aviation/2020-12-09/aerion-as2-backlog-tops-65b-avion-pacific-deal
  62. https://an.aero/the-future-of-supersonic-travel-challenges-and-opportunities/
  63. https://boomsupersonic.com/press-release/boom-supersonic-announces-new-aircraft-engine-and-investment-milestones
  64. https://hmmh.com/wp-content/uploads/2019/01/Paper_MEE_Supersonic_Whitepaper_2019.pdf
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