Consortium for the development of a new turbofan propulsion

Supersonic boom, the company behind the world’s fastest airliner, announced Symphony, a new propulsion system designed and optimized for its Overture supersonic airliner. Boom also announced it will work with three industry leaders to develop Symphony, including Florida Turbine Technologies (FTT), a business unit of Kratos Defense & Security Solutions Inc. – for engine design, GE additive for consultancy in additive technology design e Aero Standards for maintenance.

The Symphony will be a medium-bypass turbofan engine with the same basic engine architecture that currently powers all modern commercial aircraft. Unlike subsonic turbofans, this new propulsion system will include a Boom-designed asymmetric supersonic intake, a low-noise variable-geometry exhaust nozzle, and a passively cooled high-pressure turbine.

Engine design features to include:

• Architecture: Twin spool turbofan engine, medium bypass, no afterburner

• Thrust: 35,000 pounds at takeoff

• Fuel: Optimized for 100% Sustainable Aviation Fuel (SAF)

• Single stage fan designed for silent operation

• Passively cooled high pressure turbine

• Additive manufacturing for low weight, low part count, and reduced assembly costs

• Certification: Compliant with FAA and EASA Part 33 requirements

“Developing an Overture-specific supersonic engine offers by far the best value proposition for our customers,” said Blake Scholl, founder and CEO of Boom Supersonic.

Symphony will be a one-of-a-kind design that leverages proven technologies and materials to achieve optimal supersonic performance and efficiency. Overture’s new propulsion system will operate at zero carbon emissions and meet Chapter 14 noise levels. Compared to derivative approaches, Symphony is expected to deliver a 25 percent increase in airtime and a significant reduction in engine maintenance costs , reducing overall operating costs for airline customers by 10%.

“United and Boom share a passion for making the world dramatically more accessible through sustainable supersonic travel,” said Mike Leskinen, president, United Airlines Ventures. “The Boom team understands what we need to create a compelling experience for our passengers, and we look forward to having a United supersonic fleet powered by Symphony.”

Boom selected FT as its engine design team due to its expertise in supersonic engine design, including key engineers on the team responsible for the design of the F-119 and F-135 supersonic engines that power the F-22 and F- 35.

“The FTT team has a decades-long history of developing innovative, high-performance products propulsion solutions“said Stacey Rock, president of FTT. “We are proud to collaborate with Boom and its Symphony partners and look forward to developing the first engine of its kind for sustainable and economical supersonic flight.”

GE Additive will also partner with the Symphony program, offering proven expertise in the design of additively manufactured engine components, enabling leaner development, reduced weight and improved fuel efficiency.

“We are thrilled to support Overture and Symphony,” said Chris Schuppe, general manager of Engineering and Technology at GE Additive. “GE Additive will bring industry-leading capabilities to Symphony, providing consultancy and technology for additive manufacturing design, while exploring additional areas of potential collaboration.”

In addition, StandardAero, one of the largest independent maintenance, repair and overhaul (MRO) providers in the aerospace industry, will ensure Symphony is engineered for maintainability. Boom’s partnership with StandardAero aims to provide reliable and cost-effective operations and provide maintenance services for the life of the aircraft. Boom will also benefit from StandardAero’s expertise as an assembler of supersonic engines.

“We are thrilled to partner with Boom as a strategic engine MRO partner and for the opportunity to contribute to the company’s bright future by ensuring its aircraft receive the best engine MRO services in the industry,” said Russell Ford , president and CEO of StandardAero. “Our current qualifications, capabilities and experience in the assembly and maintenance of military supersonic jet engines make us the smart solution for future commercial supersonic engine MRO applications.”

With Project Symphony already underway, Overture aims to achieve type certification in 2029. Production will begin in 2024 at the Overture superfactory in Greensboro, North Carolina, with launch in 2026 and maiden flight in 2027.

Serving the civil and government markets, Overture will fly twice as fast as today’s airliners. Symphony, a Boom-led collaboration with industry leaders, is the propulsion system that will power Overture. Overture’s order book, including American Airlines purchases and options, United Airlines, and Japan Airlines, totals 130 aircraft. Boom is working with Northrop Grumman on Overture’s government and defense applications. Boom’s suppliers and partners on the Overture program include Collins Aerospace, Eaton, FTT (a business unit of Kratos Defense & Security Solutions Inc. based in Jupiter, Florida), GE Additive, Safran Landing Systems, StandardAero and U.S. Air Force.

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