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Boom Supersonic to Begin Assembly of Symphony Engine Within Weeks

Boom Supersonic to Commence Assembly of Symphony Engine Within Weeks
Boom Supersonic is set to begin assembling its first Symphony engine in the coming weeks, marking a pivotal moment in the company’s progression from design to manufacturing. This development represents a key phase in Boom’s “engine-first” strategy, aimed at validating its propulsion technology alongside a vertically integrated manufacturing model.
In a recent update from Boom’s research and development supercenter, founder and CEO Blake Scholl revealed, “We are literally standing where we’re going to be building the first engine starting in about two weeks. We are going to assemble 200 megawatts of turbines next year for shipment to our first launch customer.” This announcement, shared with investors, highlights Boom’s transition into the execution phase of its Superpower turbine program.
Assembly and Testing of the First Symphony Engine
The initial Symphony engine to be assembled is intended for ground testing rather than flight. It will form part of Boom’s Superpower turbine program, which was first introduced in December 2025. Although the Symphony engine architecture was originally designed for Boom’s Overture supersonic airliner, it is now being adapted into a 42-megawatt industrial gas turbine.
Scholl explained that the first build will concentrate on the “sprint core,” encompassing the engine’s most complex components: the high spool, high compressor, combustor, and high turbine. The sprint core assembly is expected to be completed by mid-2026, after which it will be moved to Boom’s test facility for a validation campaign scheduled later that year.
Timeline, Market Demand, and Production Goals
Boom anticipates completing the first full test cycle of the core engine components by the third quarter of 2026. The company aims to assemble a fully integrated 42-megawatt pre-production turbine by the end of 2026, with operational readiness targeted for the first half of 2027. Deliveries to launch customer Crusoe are planned for late 2027, with an initial order of five units representing approximately 200 megawatts of installed capacity.
Scholl noted that demand has already exceeded initial expectations. “When we announced this in December, my inbox got flooded with demand,” he said. Boom had originally planned to manufacture a total of 7.5 gigawatts of turbines by 2030, but current orders have already surpassed that figure.
Industry Skepticism and Competitive Challenges
Despite these advancements, Boom faces considerable skepticism from industry experts. Analysts such as Richard Aboulafia have expressed doubts about the viability of both the Overture airliner and the Symphony engine, citing technical and market challenges. United Airlines CEO Scott Kirby has publicly assessed the odds of Overture’s success as “50-50,” reflecting cautious optimism among potential customers.
The broader aerospace sector remains cautious, particularly as other high-profile supersonic projects, including NASA’s X-59, encounter their own difficulties. While competitor responses have not been explicitly detailed, the market environment is characterized by prudence and rigorous scrutiny.
As Boom advances with its engine-first approach, the company aims to establish a near-term revenue stream through turbine production while continuing development of its ambitious supersonic aircraft. The forthcoming months will be critical as Boom seeks to transition from promise to production within a competitive and skeptical industry landscape.

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