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Boom Supersonic Announces New Aircraft, Engine, and Investment Milestones



New strategic investment from NEOM comes as XB-1, Symphony and Overture achieve important program milestones

DENVER /PRNewswire/ — Boom Supersonic, the company building the world’s fastest airliner, announced today multiple milestones across the Overture airliner, Symphony engine, and XB-1 supersonic demonstrator programs. The company also confirmed closing of an investment round, including a strategic investment from the NEOM Investment Fund (NIF). Boom’s total funding to date now exceeds $700 million.

New strategic investment from NEOM Investment Fund comes as XB-1, Symphony and Overture achieve important program milestones.

“Our goal is to bring the world closer together through faster flights,” said Blake Scholl, founder and CEO of Boom Supersonic. “We’re excited to collaborate with partners and investors around the globe as we work to realize our shared vision.”

Announced on October 24, the NEOM Investment Fund is the strategic investment arm of NEOM, the sustainable regional development in northwest Saudi Arabia. As part of the agreement, Boom and NIF will collaborate on opportunities to make the Gulf region dramatically more accessible, through the power of supersonic flight. The NIF investment now takes Boom’s total funding from investment and other capital sources to more than $700 million. 

XB-1 readying for first flight this year
Boom achieved key milestones toward XB-1’s historic first flight, which remains on track for later this year at the Mojave Air & Space Port. After the receipt of its airworthiness certificate from the Federal Aviation Administration (FAA), XB-1 has recently completed successfully a number of integrated tests, including ground vibration mode testing, fuel system integrated testing, engine operability testing, and medium-speed taxi testing up to 90 knots. Following its Flight Readiness Review (FRR) last week, XB-1 will conduct high-speed taxi testing in final preparation for its first flight. 

Symphony propulsion system hits development milestone
Boom also announced that Symphony, the Boom-developed propulsion system purpose-built for sustainable and economical supersonic flight, has successfully conducted its key 2023 engineering milestone, known as the Conceptual Design Review (CoDR). This important achievement paves the way toward Symphony’s first hardware rig tests planned for 2024. 

Overture Superfactory construction ahead of schedule
In late September, Boom commemorated the “topping out” of the Overture Superfactory at the Piedmont Triad Airport in Greensboro, North Carolina, signifying the completion of the building’s frame. Over the past six weeks, the company has finished the decking on the top of the structure, poured the concrete flooring, and installed the metal side wall panels. The work to complete the Overture Superfactory is now ahead of its original schedule with completion anticipated in the second quarter of 2024.

For more information about Overture, please visit: https://boomsupersonic.com/overture

For more information about XB-1, please visit: https://boomsupersonic.com/xb-1

About Boom Supersonic
Boom Supersonic is transforming air travel with Overture, the world’s fastest airliner, optimized for speed, safety, and sustainability. Overture will fly at twice the speed of today’s airliners and is optimized to run on 100% sustainable aviation fuel (SAF). Overture’s order book stands at 130 aircraft, including orders and pre-orders from American Airlines, United Airlines, and Japan Airlines. Boom is working with Northrop Grumman for government and defense applications of Overture. Suppliers and partners collaborating with Boom on the Overture program include Aernnova, Leonardo, Aciturri, Safran Landing Systems, Eaton, Collins Aerospace, and the United States Air Force.

Symphony™ is the propulsion system that will power Overture, a Boom-developed engine with world-class suppliers including Florida Turbine Technologies (FTT), a business unit of Kratos Defense & Security Solutions, Inc., GE Additive, and StandardAero. For more information, visit https://boomsupersonic.com

Connect with Boom Supersonic on TwitterLinkedInFacebookInstagramYouTube

NEOM Investment Fund
NEOM Investment Fund is the strategic investment arm of NEOM, designed to activate, advance, and accelerate the global transformational changes critical to a sustainable future. NIF will support the buildout and development of NEOM and deliver mutual, long-term value across sector projects with large multinationals, innovators, and the wider institutional investment community that are participating in the building of NEOM and the implementation of its vision for the future. Its core activities include executing investments alongside NEOM’s sectors and subsidiary companies in pioneering growth companies and next-generation industries, and on fundraising at the project level that would ultimately lead to strategic management of NEOM’s diverse portfolio of commercial assets. As a catalyst for change, NIF actively seeks out and advocates for setting up large anchor businesses in NEOM, along with “moonshot” tech investments that are required to deliver sustainable long-term prosperity at a time when the world faces challenges of unprecedented scale and complexity.

For more information about NEOM Investment Fund, visit https://www.neom.com/en-us/invest/neom-investment-fund or visit http://www.neom.com and http://www.neom.com/en-us/newsroom

SOURCE Boom Supersonic

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Sierra Space Layoffs: Impact on Dream Chaser Spacecraft and Future Plans

Sierra Space lays off employees and contractors after completing Dream Chaser spacecraft. Uncertainty looms for the company’s future.



Image: Sierra Space

In a surprising turn of events, Sierra Space, the Colorado-based aerospace company, has announced layoffs affecting a significant number of employees and contractors. The company, known for its construction of the innovative Dream Chaser spacecraft, recently completed its first spacecraft and is preparing for its maiden launch.

Sierra Space, which previously employed around 2,200 individuals across the country, has informed approximately 165 employees and an undisclosed number of contract workers that their positions will be terminated. The news of these job cuts was initially reported by CNBC and has since been confirmed by a company spokesperson.


This announcement brings a sense of uncertainty for those impacted by the layoffs, as well as the broader aerospace community. While Sierra Space has taken a significant step forward in its space exploration endeavors with the completion of the Dream Chaser spacecraft, it appears that the company is undergoing internal restructuring.

As the Dream Chaser spacecraft heads to a NASA testing facility in preparation for its upcoming launch, scheduled for April, the future of Sierra Space remains uncertain. The aerospace industry will be watching closely to see how this setback impacts the company’s trajectory and its ability to continue pushing the boundaries of space exploration.

Take a look at the story on CNBC. https://www.cnbc.com/2023/11/16/sierra-space-layoffs.html


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Aerospike Engines: Efficient Altitude-Compensating Rocket Technology

Discover the innovative aerospike engines, designed for efficient altitude compensation in rocket technology, promising enhanced performance.



The aerospike engine is a unique type of rocket engine that maintains its aerodynamic efficiency at various altitudes. It falls under the category of altitude-compensating nozzle engines and has been extensively studied for many years. While it has not yet entered commercial production, it is widely regarded as a promising engine for single-stage-to-orbit (SSTO) designs and was even considered for the Space Shuttle main engine.

NASA‘s Toroidal aerospike nozzle

The terminology surrounding aerospike engines can be confusing. Originally, the term “aerospike” referred to a truncated plug nozzle with a conical taper and gas injection, creating an “air spike” to compensate for the absence of the plug tail. However, the term is now commonly used to describe a full-length plug nozzle.

Traditional rocket engines use a bell-shaped nozzle to direct exhaust gases and generate thrust. However, as the vehicle ascends, the expanding exhaust escapes in the wrong direction, reducing engine efficiency. In contrast, an aerospike engine avoids this efficiency loss by firing the exhaust along the outer edge of a wedge-shaped protrusion, or “spike,” which acts as a virtual bell. The recirculation of exhaust gases in the base zone of the spike helps maintain pressure, especially at low altitudes, where the ambient pressure compresses the exhaust against the spike.

As the vehicle climbs to higher altitudes, the reduced air pressure decreases the exhaust’s contact with the spike. However, the recirculation zone at the base of the spike maintains pressure higher than the near-vacuum in front of the vehicle, providing additional thrust. This compensates for the decreasing ambient pressure, making the aerospike engine an effective altitude compensator.

Are Aerospikes Better Than Bell Nozzles?

Aerospike engines have some drawbacks, including the additional weight of the spike and reduced performance in the Mach 1-3 range due to reduced airflow pressure. Nevertheless, variations of the aerospike design, such as the toroidal aerospike and linear aerospike, offer different shapes and possibilities for improved efficiency and control.

In conclusion, the aerospike engine presents a promising solution for maintaining aerodynamic efficiency across various altitudes. Its innovative design and altitude-compensating capabilities make it a potential game-changer in the field of rocket propulsion, opening up new possibilities for future space exploration and transportation.

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United States Space Force: Protecting America’s Interests in Space

“Learn about the United States Space Force: its formation, purpose, and role in protecting national security and space assets.”



The United States Space Force (USSF) is the newest branch of the U.S. Armed Forces, established to protect American interests in space. It was formed on December 20, 2019, when President Donald Trump signed the United States Space Force Act, making it the first new independent military service in over 70 years.

Cloudy rocket launch. The elements of this image furnished by NASA.

While the concept of a Space Force had been discussed since the 1950s, the need for a dedicated space-focused military branch became increasingly evident with the growing importance of space in national security and defense. The USSF operates under the Department of the Air Force, similar to how the Marine Corps operates under the Department of the Navy. It is led by the Secretary of the Air Force and its military heads are the Chief of Space Operations and the Vice Chief of Space Operations.

The Space Force’s primary purpose is to ensure the freedom of operation in space and protect U.S. space assets. It is responsible for organizing, training, and equipping space forces, which are then deployed to the unified combatant commands, particularly the United States Space Command. The Space Force operates various programs and systems, including GPS, the Space Fence, military satellite communications constellations, X-37B spaceplanes, the U.S. missile warning system, the U.S. space surveillance network, and the Satellite Control Network.

The USSF’s formation marked a significant recognition of the critical role space plays in national security, communication, and technological advancement. As the world becomes increasingly reliant on space-based assets for navigation, communication, and intelligence gathering, the Space Force aims to protect these capabilities, deter aggression, and maintain superiority in space.

By establishing the Space Force, the United States has demonstrated its commitment to safeguarding its interests in space and maintaining its position as a global leader in space capabilities. As technology continues to advance and more nations venture into space, the United States Space Force will play a vital role in ensuring the security and resilience of American assets in this final frontier. Kindly click on the link for further details: https://www.spaceforce.mil/

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