Boom Supersonic has chosen a site at the Colorado Air and Space Port in Watkins, Colorado, for testing its innovative Symphony propulsion system.
This location, previously used for hypersonic engine development, will now support the testing of Symphony, a medium-bypass turbofan engine designed specifically for supersonic flight.
Boom plans to invest $3-5 million this year to prepare the site, with testing set to begin later in 2025.
The company is developing the world’s fastest airliner, Overture, which will potentially herald a new supersonic age.
A Step Forward for Supersonic Travel
“Symphony is moving quickly from a watermark design concept to reality,” said Blake Scholl, Boom Supersonic’s Founder and CEO. “By using an existing site, we’ve created the first independently owned supersonic engine test facility at a fraction of the cost of renting a government site.”
“Controlling our propulsion development lets us speed up progress, cut costs, and tailor Symphony to Overture’s needs, enabling unique features like Boomless Cruise.”
Located just 35 miles from Boom’s headquarters in Adams County, the Colorado Air and Space Port facility will play a key role in testing Symphony’s prototype core this year.
The core, measuring 12 feet long and 4 feet wide, includes the engine’s high-pressure components—compressor, combustor, and turbine. These are the heart of the first independently developed supersonic jet engine.
Boosting Colorado’s Aerospace Industry
“This is a thrilling milestone for Adams County and Colorado’s aerospace future,” said Lynn Baca, Chair of the Adams County Board of Commissioners. “Boom’s investment highlights our region’s role in pioneering next-generation transportation technologies.”
The facility features a control room and advanced tools to collect data during tests. This information will help Boom refine Symphony’s design and manufacturing processes.
In 2026, Boom plans to expand the site to test the full Symphony turbofan prototype, a major step toward production.
Colorado Air and Space Port
“We’re excited to welcome Boom Supersonic to the Colorado Air and Space Port,” said Jeff Kloska, Director of the port. “Supporting the Symphony engine’s development strengthens our aviation and aerospace community, and we look forward to a strong partnership with Boom.”
The Symphony engine is advancing rapidly. In March 2025, it passed a critical technical review, kicking off manufacturing. Several parts are already in production, and engine assembly will begin later this year. Once production ramps up, Boom will partner with StandardAero in San Antonio, Texas, to build Symphony engines at scale.
The Development of Symphony
By designing and controlling Symphony’s development, Boom unlocks advanced capabilities for Overture. One standout feature is Boomless Cruise, which allows supersonic flight without a disruptive sonic boom on the ground.
Symphony’s enhanced performance at transonic speeds (near the speed of sound) enables Overture to reach supersonic speeds efficiently above 30,000 feet, where Boomless Cruise works best.
In February 2025, Boom’s XB-1 demonstrator flew faster than sound six times without a detectable sonic boom on the ground.
This breakthrough paves the way for Overture to fly supersonically over land using Boomless Cruise, a game-changer for commercial aviation.
Looking Ahead
Overture has already secured 130 orders and pre-orders from major airlines like United Airlines, American Airlines, and Japan Airlines. These commitments cover the first five years of production at Boom’s Overture Superfactory in Greensboro, North Carolina.
With Symphony’s development on track and a state-of-the-art testing facility in Colorado, Boom Supersonic is steadily moving towards its overall goal.
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