Ursa Major
@ursamajortech
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We make high-performing rocket engines for space launch and hypersonics, right here in America 🇺🇸
Colorado, USA
Joined May 2017
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Over the past six months a film crew captured Ursa Major’s journey from developing new propulsion prototypes at industry leading speeds to our Hadley engines first-flight in support of a hypersonic test vehicle.
We introduce to you, the future of...PROPULSION.
WATCH HERE:
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Having a blast with Ripley, our 50,000 lbf rocket engine, on the test stand 🔥
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BIG news—meet Arroway, our newest engine.
✅200K-lb thrust liquid oxygen and methane staged-combustion engine
✅For medium to heavy launch markets
✅Will displace the RD-180 and RD-181 (when clustered)
✅Available to order now, delivery in 2025
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Some may wonder how we thought of the name 'Draper' for one of our rocket engines 💭. Sci-Fi television series
@ExpanseOnPrime
premiered in 2015 and features the character Bobbie Draper, who the Draper engine is named after!
#TheMoreYouKnow
🚀
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🔥 footage — the Hadley engine has been busy with our partners at
@Stratolaunch
, who are hotfire testing in anticipation of their vehicle’s first hypersonic flight attempt later this year.
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We're getting ready to meet our biggest goal to date. Intriguing? Keep up with Ursa Major by following this account.
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Ursa Major and
@Stratolaunch
achieved a major leap forward with the first flight of a privately funded reusable hypersonic vehicle during today's test over the Pacific Ocean.
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#UrsaMajorFirsts
: Ursa Major’s Hadley engine powered Stratolaunch's Talon 1, the nation’s first reusable hypersonic test vehicle developed by a private company. Hadley’s first flight took place in March 2024 and reached near-hypersonic speeds.
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This is Hadley— made in Colorado, it’s the only rocket engine qualified for space launch and hypersonics.
#rocketscience
#propulsion
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BIG NEWS – today we announced the successful hotfire of our Draper engine ahead of schedule. Designed from the ground up for hypersonic applications and in-space propulsion, Draper is primed to address the growing demand of the U.S. defense industrial base.
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Talon-A is looking good,
@Stratolaunch
! Congrats 🚀
We’re proud to provide the propulsion system, and we can’t wait to see it fly.
Read more:
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Oh nothing, just gazing at this beauty! Hello there, Hadley 🇺🇸
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Our family of rocket engines can accommodate a variety of mission needs—from space launch and hypersonics to national defense.
Learn more about our engines here:
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Ursa Major is proud to introduce Lynx, a new approach to solid rocket motor (SRM) manufacturing. Lynx is a faster, more affordable process that promises to outperform legacy systems.
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We had a blast hosting
@Erdayastronaut
and can't wait to share the full video! 🔥🔥
When
@ursamajortech
invites you out with the promise of getting up close & personal with rocket engines, they mean it! This brought a whole new meaning to "hands on"!!! The gear head in me absolutely loved it! Can't wait to share the whole tour with you as early as next week! 🙌
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Last week, we introduced Draper.
Learn more about this storable evolution of Hadley here:
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You're looking at a flexible engine with the storability of a solid motor, the throttle and relight capability of a liquid engine, and the performance of a closed cycle.
#Draper
#PropulsionPerfected
🚀
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Turbopumps! Completing one of these is the first step in the rocket engine-building process for Hadley. Once finished, this is stacked onto the main chamber.
Learn more about Hadley ➡️
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The future of propulsion is here.
The story of Ursa Major will be told in the upcoming film, "Propulsion." Witness the cutting-edge technology powering the next frontier of aerospace and defense innovation. Stay tuned to our social channels for more coming soon!
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What did the big Hadley say to the small Hadleys? Ursa small bros 🐻
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Congratulations to
@Stratolaunch
for the first flight of the TA-1 hypersonic testbed which reached high supersonic speeds approaching Mach 5 using Ursa Major's Hadley rocket engine. Take a look behind the scenes of our prep:
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How it started How it's going
At left is our original design of Ripley, then a 35K lbf rocket engine. At right is the current 50K lbf version, which has been through several hotfire tests this year.
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We’re excited to announce our agreement with
@Astra
to provide Hadley engines for the upper stage of Astra’s Launch System 2 on its newly architected, higher-capacity Rocket 4 launch vehicle 🚀🔥
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Hadley features an ignition system capable of multiple restarts to enable longer missions.
Learn more about Hadley:
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.
@ursamajortech
's Hadley engine, a purpose-built engine designed to satisfy America's commercial & national security space needs, flew for the first time powering
@Stratolaunch
's Talon-A testbed. The test reached high supersonic speeds approaching Mach 5.
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Last week, we shared an update about our latest Hadley shipment.
How exactly do we ship our rocket engines, though? We're glad you asked... 🧵
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NEW ENGINE +
@AFResearchLab
contract
The Air Force is funding development on:
• Draper, our first storable engine, for hypersonics and space launch capabilities
• Arroway, our 200K lbf engine, as a replacement for the Russian-made RD-series
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“Propulsion touches more parts of your life than you are even aware of.”
A mini-documentary “PROPULSION”, brings to life the importance of advanced propulsion systems in today’s world and the innovative initiatives by Ursa Major to revolutionize a new age - coming this
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"Ursa focuses on only one thing: making the best rocket engines. This company, this team, and our engines keep me excited to come in to work every day."
-
#Propulsion
Engineer
@ayyitsjameslmao
Want to feel the same way about your job?
#aerospacejobs
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The Ursa Major team began designing a composite Solid Rocket Motor using our Lynx Manufacturing Process in February 2024, with a mission to rapidly progress from concept to hotfire testing within FOUR MONTHS. Following multiple design iterations and prototype cycles, the team
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Thanks to
@Erdayastronaut
for visiting us at our HQ in Berthoud, Colorado. This episode takes an exclusive deep-dive into our facilities and features remarks from CEO Joe Laurienti on what Ursa Major has in store for the near future. 🚀
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Two firsts to start the week: We recently conducted our first hotfire test of Hadley’s copper chamber, which also made this the first Youngstown-made hardware on the test stand!
Stay tuned tomorrow for video.
#propulsion
#rockets
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Coming soon to a launch pad near you: the highest-performing American kerosene engine ever built.
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100 engines down. Congratulations to everyone whose creativity, precision, rigor, and persistence made this happen.
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#UrsaMajorFirsts
: In 2019, we developed the highest-performing kerosene engine in the United States–Ripley, the highest Specific Impulse (Isp) of any American kerosene rocket engine in history.
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Ursa Major employees received a patch commemorating the first hotfire test of its Ripley engine.
We made very limited quantities, but we’re giving away ONE patch to the general public. To enter, follow us and answer this question: How much thrust (lbf)
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Here's a longer cut with a few more angles for anyone who hasn't seen it yet 🚀🚀🚀
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Broomsticks to space Rogozin? No need. We have our own staged combustion engines right here.
#Sanctions
#Russia
#Rogozin
#broomsticks
Russia will stop supplying the U.S. with rocket engines, the head of Russia's space agency said — a retaliatory move over the White House's sanctions on Moscow.
“Let them fly on something else, their broomsticks, I don't know what,” he told state TV.
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It's
#CopperAppreciationAugust
.
This month, we'll highlight copper's unique qualities that make it a crucial material in the aerospace industry. In the meantime, enjoy this clip featuring the birth of our Hadley engine 🤩
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This is Hadley—made in the U.S.A.,
#3DPrinted
, and the only rocket engine qualified for space launch and hypersonics.
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To mark the start of
#WorldSpaceWeek
, enjoy this video of Hadley, America's first oxygen-rich staged combustion engine take its first flight.
Hadley is qualified for launch, hypersonic, and in-space missions.
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Have you met Arroway?
Our 200,000-lbf engine features a compact, fuel-rich staged combustion architecture using liquid oxygen and methane propellants.
Learn more:
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What's your favorite thing about copper?
#CopperAppreciationAugust
A) Nearly 400 W/m K of thermal conductivity
B) Extreme ductility
C) Slight shininess
D) It was created by massive, long-gone stars
E) Other (let us know!)
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"Because Ursa Major focuses solely on
#propulsion
, we’re in a unique position to deliver high-performing, reliable, and affordable engines to meet the increasing market demand, just like we are doing with Hadley and Ripley."
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Home sweet home. Our 90-acre headquarters houses engineering, manufacturing, and testing in one campus.
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GRCop-42 is a copper/chromium/niobium alloy used to additively manufacture parts in need of high-strength dispersion and high conductivity. At the Ursa Major Advanced Manufacturing Lab, we use GrCop-42 to make the thrust chambers for Hadley.
#CopperAppreciationAugust
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.
@AviationWeek
covered the development of our 4,000 Ib.-thrust Draper engine, which is being manufactured under an
@AFResearchLab
(AFRL) contract. Read more about our ambitions for the engine:
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Our version of fireworks on NYE is fire, that works. From all of us at Ursa Major, happy 2024.
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Design, assembly, and testing—we do it all here at Ursa Major headquarters in Berthoud, Colo. 🇺🇸
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How do combustion chambers sustain high temperatures without melting? Copper!
When combining copper with other elements like chromium and niobium, we can increase its durability while maintaining its unique thermal-conducting abilities.
#CopperAppreciationAugust
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Feast your eyes on these recent photos of the vacuum variant of our Hadley engine.
Compared to our sea level variant, this version has a bigger nozzle (shown here with stub skirt extension) and is designed for multiple restarts.
#rocketscience
#propulsion
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We’re taking orders now, and planning for initial hot-fire testing next year with delivery in 2025.
Congratulations to our entire team on their hard work! 🚀
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Flexible, scalable, and cost-effective. Ursa Major’s Lynx approach is more than just a leap forward in manufacturing efficiency; it’s a game changer.
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We're excited to announce that Ursa Major received $138 million in our Series D & D-1 funding rounds. Crucial funding allows us to continue scaling up & advancing programs dedicated to propulsion. Learn more:
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A row of Hadley rocket engines, all lined up and ready to ship out to our customers 🚀
#rockets
#propulsion
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Shout-out to one of our key partners! We’re excited to support
@Stratolaunch
in their mission of accelerating hypersonic technology.
#hypersonic
#rocketscience
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With well-deserved respect to
@Salesforce
,
@McConaughey
, and the “New Frontier” TV ad, we at Ursa Major disagree that we have to choose between space and earth.
The new frontier IS rocket science, AND it’s also right here:
#teamearth
#teamspace
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From our founder & CEO Joe Laurienti:
“Arroway is America’s engine of the future. Medium and heavy-launch capacity is what U.S. launchers desperately need right now." (continued below)
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Ursa Major has extended its partnership with
@AmericaMakes
to accelerate US manufacturing competitiveness. Additive manufacturing pieces, like this copper combustion chamber produced for Hadley, mean faster engine production and lower costs.
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Ursa Major is helping America rapidly restock its missile arsenal by being at the forefront of 3D printing and additive manufacturing innovation using its Lynx solid rocket motor (SRM) manufacturing process. Read more from Forbes:
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Ursa Major 🤝
@vectorlaunch
We’re providing several Hadley engines to support Vector’s recently awarded U.S. national security contract.
Learn more here:
#NewSpaceEconomy
#Propulsion
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A healthy defense industrial base needs a robust ecosystem of agile, new innovators. We’re proud to enable launch, hypersonics, and tactical missions by providing the most critical technology: the propulsion system.
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“When I was 5, I asked my mom how rockets had fire in outer space if there was no oxygen. This question and others like it started me on a quest to learn more and contribute to human spaceflight.”
-Dave Sanderson, Director of System Design and Integration
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Our Hadley engines are 80%
#3Dprinted
, which allows us to make data-driven design improvements and manufacture them essentially in real-time.
Learn more (and watch a hot-fire test) here:
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We are proud to announce that Ursa Major is the only independent AS9100D-certified propulsion company in the U.S. We achieved certification by proving we were taking the proper measures to consistently meet the requirements of our industry. Read more:
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Happy birthday to the late, great Ray Bradbury -- his short story, "The Veldt," is where our Hadley engine got its name. You can listen to an audio drama of the story here:
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Ripley is our next engine — with 10x the thrust of Hadley (50,000 lbf) and enhanced lox/kerosine propulsion capacity. Reusable and flexible. Industry-leading performance and power at a price that will change the space launch industry.
#MeetTheEngines
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Good morning from Berthoud, CO. 🇺🇸
Our beautiful 90-acre HQ includes facilities for everything from engineering to manufacturing to testing operations. With multiple testing stands for full-engines, sub-components, & multi-propellants, we're proud to call Colorado home.
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Teamwork makes the dream work 🚀
Turbo Design Engineer Stephanie Gavell (L) and Build Operations Manager Chaka Smith (R) are pictured here assembling one of our Hadley engines.
#rocketscience
#aerospace
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Today, we’re celebrating 8 years of Ursa Major! 🎉🔥🚀
Here’s a look back at where we started and how far we’ve come 🧵 1/10
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In 2022, Ursa Major hired hundreds of talented, hard-working people. We introduced Arroway. We ran 29,606 seconds of hotfire tests, saw successful tests of Hadley by
@Stratolaunch
and
@PhantomSpaceC
, and so much more.
Thanks to all who helped make it happen.
#HappyThanksgiving
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What stops rocket engines from melting while hot firing? Copper alloys!
As
#CopperAppreciationMonth
wraps up, it’s the perfect time to highlight how copper's thermal conductivity allows the alloys to rapidly dissipate heat, preventing rocket engines from melting.
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ICYMI: Our Hadley vacuum variant will be used on the upper stage of
@Astra
’s Launch System 2.
Learn about the agreement here:
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The Hadley vacuum variant (left) provides 6,500 pounds of thrust, while the sea-level configuration (right), which is what you’ve seen in most of our past tweets, provides 5,000 pounds of thrust.
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"Unlike historical rocket engines, Ursa Major uses metal Additive Manufacturing to speed up the production process, allowing the company to build engines in a matter of days." Read about Hadley's first flight in
@MetalAMMag
:
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🚁 Drone footage of our first hotfire test of the Hadley copper chamber variant.
#rockets
#rocketscience
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Last week we celebrated Ursa Major's working parents on National Working Parents Day -- and extended a warm welcome to the newest member of the Working Parents ERG, CEO Joe Laurienti!
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New Year, new digs.
We recently finished an upgrade to our Berthoud, Colo. headquarters.
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We've gone green for
#StPatricksDay
🍀
This is a finite element model of our Ripley engine. We use analyses like this to assess vibrations and fatigue life—which is important to know with a reusable rocket.
You can learn more about Ripley here:
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Our Hadley engine builds begin with the turbopumps. Once completed, they're stacked onto the main chamber.
Want to learn more about Hadley? ➡️
#RocketScience
#aerospace
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JUST ANNOUNCED: The
@usairforce
has awarded us a contract to develop a flight-ready Hadley rocket engine for launch in 2022 under the agency’s TACFI program.
#rockets
#nationaldefense
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"Through this endeavour, Ursa Major is leaning on additive manufacturing to design and manufacture its complex engine systems, with products like the Hadley said to be built within a matter of days." Read more in
@TheTCTMagazine
:
Ursa Major's Hadley engine flies successfully with Stratolaunch TA-1 test vehicle.
"Ursa Major and Stratolaunch have come together to advance a critical national mission."
Read more >>
#3DPrinting
#AdditiveMfg
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We're thrilled to have raised $138 million in Series D funding to help the U.S. scale its missile arsenal. Read more from
@Forbes
:
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Innovation drives Ursa Major. We're excited to welcome
@ColoradoStateU
graduate students to our campus for a safe static fire test of a small bi-prop engine.
These students push boundaries and work to solve once-impossible challenges—a core mission of Ursa.
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