New Glenn vs. Nova

A New Player Enters the Orbit

On November 13, 2025, the Florida sky was split by a pillar of fire. The 321-foot-tall New Glenn rocket, a machine a decade in the making, climbed from the historic Launch Complex 36 at Cape Canaveral, pushing against the Earth with over 3.8 million pounds of thrust. Its cargo was NASA’s twin ESCAPADE spacecraft, two probes destined for a long, looping journey to Mars. For Blue Origin, the secretive and methodical company founded by Jeff Bezos, this launch was a moment of significant consequence.

But the real drama wasn’t the ascent; it was the descent.

Ten months earlier, in January 2025, New Glenn’s maiden flight had been a partial success. It achieved orbit and deployed its test payload, but the all-important first-stage booster – the reusable part of the rocket – was lost during its landing attempt. For a company whose entire philosophy is built on reusability, this was a public and costly failure. It reinforced criticisms that Blue Origin was moving too slowly, that it was failing to catch its rival, SpaceX.

Now, as the second New Glenn booster, this one nicknamed Never Tell Me the Odds, fell back to Earth from the edge of space, the entire company held its breath. It plunged through the atmosphere, reignited its BE-4 engines in a complex braking maneuver, and descended toward a robotic landing barge named Jacklyn, waiting hundreds of miles away in the Atlantic. This time, the rocket’s telemetry was stable. The engines burned, the landing legs deployed, and the 18-story booster settled perfectly onto the deck.

In that moment, the global launch market was permanently altered. The success of the New Glenn’s second flight, and its first successful booster recovery, did more than just validate Blue Origin’s hardware. It instantly shattered the monopoly that SpaceX had held for years over the operational, reusable heavy-lift launch market. For the first time, high-value customers like NASA and the U.S. Space Force had a choice. They were no longer reliant on a single provider for their most important payloads. This single landing created a duopoly, and in doing so, de-risked America’s access to space.

Yet, as Blue Origin celebrated its hard-won triumph, a much smaller, more aggressive startup was preparing its own challenge. This new company, Stoke Aerospace, is not just trying to join the reusable rocket club; it’s trying to rewrite the rulebook. While Blue Origin proved its evolutionary approach – a reusable first stage and an expendable second stage – Stoke is betting its entire existence on a far more revolutionary path: a 100% fully and rapidly reusable vehicle, from top to bottom.

The true twist, and the heart of this story, is that Stoke Aerospace was founded by the very engineers who helped design the engines for New Glenn. It’s a classic tale of the protégés striking out on their own, convinced their former mentors are on the wrong path. The battle between New Glenn and Stoke’s rocket, Nova, is more than a competition between two machines. It’s a high-stakes, multi-billion-dollar schism in engineering philosophy, a fight over the one question that defines the future of the space economy: What is the true cost of accessing orbit, and what is the right way to build a rocket that can truly conquer it?

Blue Origin: The Tortoise Reaches the Finish Line

A Decades-Long Vision

To understand New Glenn, one must first understand the unique, almost geological timescale on which Blue Origin operates. Founded in 2000 by Jeff Bezos, the company’s name, “Blue Origin,” is a direct reference to Earth, the blue planet from which humanity will expand. Its mission is not a short-term business plan; it’s a generational vision to build a “Road to Space” that will eventually allow millions of people to live and work in orbit, harnessing the solar system’s resources for the “Benefit of Earth.”

The core strategy to achieve this is simple to state but fiendishly difficult to execute: “radically reduce the cost of access to space.” And the only way to do that, in Blue Origin’s view, is through reusability.

This long-term vision is encapsulated by the company’s motto: Gradatim Ferociter, Latin for “Step by Step, Ferociously.” For two decades, this motto was a source of both admiration and intense criticism. While SpaceX’s “hare” was famously “moving fast and breaking things,” Blue Origin’s “tortoise” was moving with a deliberate, incremental, and often secretive slowness. The company spent years perfecting its first step: the New Shepard suborbital rocket. It was a vehicle designed to do one thing over and over: fly to the edge of space and land its booster and capsule. They mastered propulsive landing on this smaller scale, proving out the computers, the algorithms, and the BE-3 engines before ever attempting an orbital-class vehicle.

This methodical approach led to years of “perceived slow progress.” As rivals racked up dozens of orbital launches, Blue Origin had yet to reach orbit. This frustration, both internal and external, came to a head in September 2023. In a clear signal that the time for pure development was over, Jeff Bezos appointed a new CEO, Dave Limp, to succeed Bob Smith. Limp was not a long-time aerospace executive; he was the Amazon executive who had successfully scaled the company’s entire hardware division, including Alexa, Kindle, and its satellite-internet project, Kuiper.

This was not a random choice. Blue Origin wasn’t founded to be a venture-backed startup living quarter-to-quarter. It was, and is, a long-term infrastructure project bankrolled by one of the world’s wealthiest individuals, who has a generational, not a quarterly, vision. Its “slowness” was a feature, not a bug, allowing it to methodically build its core capabilities – most importantly, its own engines – from the ground up. The hiring of Limp was the strategic pivot point. The R&D phase was ending. The operational phase – producing, flying, and serving customers – was beginning. The successful flights of 2025 are the direct result of this shift from a research lab to a production powerhouse.

Anatomy of a Heavy-Lifter: The New Glenn Rocket

The New Glenn rocket is the physical manifestation of Blue Origin’s “step by step” philosophy. Named for John Glenn, the first American to orbit Earth, it is a true heavy-lift vehicle, standing 321 feet (98 meters) tall.

It is a two-stage rocket. The first stage, the part that lands and gets reused, is powered by seven of Blue Origin’s BE-4 engines. This booster is designed for a minimum of 25 flights, a key factor in the company’s cost-reduction strategy. After pushing the second stage toward orbit, it returns for a propulsive landing on a downrange droneship.

The second stage, which pushes the payload into its final orbit, is powered by two BE-3U engines, a vacuum-optimized variant of the engine that powers the New Shepard rocket. This second stage is expendable. It is designed to be thrown away on every flight.

This design makes New Glenn an absolute beast of a launcher. It can carry 45 metric tons (45,000 kg or 99,000 lbs) to Low Earth Orbit (LEO) and 13 metric tons (13,600 kg or 30,000 lbs) to the much higher Geostationary Transfer Orbit (GTO). These numbers place it firmly in the heavy-lift class, capable of launching the largest satellites and interplanetary missions.

But its most defining feature, and its key competitive advantage, is its nose cone, or payload fairing. New Glenn’s fairing is an enormous 7 meters (23 feet) in diameter. This gives it “twice the volume” of 5-meter class rockets like its main competitors, the SpaceX Falcon 9 and the ULA Vulcan.

This detail is far from trivial. For many high-value customers, the problem isn’t just mass; it’s volume. Imagine trying to ship a house. It doesn’t matter if your truck can carry 50 tons if the house is wider than the truck. New Glenn’s 7-meter fairing opens up a new market for payloads that are voluminous, not just heavy. This includes massive, next-generation space telescopes with giant mirrors that don’t need to be folded up, large, classified national security satellites, and single-piece space station modules that can be launched fully assembled. New Glenn isn’t just competing on price-per-kilogram; it’s offering a unique capability that, until Starship becomes fully operational, no other rocket can match.

This architecture also reveals Blue Origin’s pragmatic engineering trade-offs. The decision to make the second stage expendable was a important one. Building a new rocket from scratch is incredibly hard. Building a brand-new, advanced, closed-cycle engine (the BE-4) is also incredibly hard. And successfully recovering and reusing a massive first stage is also incredibly hard. By making the second stage disposable, Blue Origin contained the “miracles” required to one or two per vehicle, allowing them to focus on the two hardest new components. This practicality got them to orbit. But as we’ll see, it’s the very design choice that Stoke Aerospace identifies as a long-term, fatal flaw. Blue Origin is aware of this, which is why it has a “Project Jarvis” in the works – a long-term plan to one day develop a reusable second stage.

The Engine That Forged Two Companies: The BE-4

The heart of New Glenn, and the lynchpin of Blue Origin’s entire strategy, is the BE-4 engine. It is the most powerful liquefied natural gas-fueled engine ever flown and the first Oxygen-Rich Staged Combustion (ORSC) engine developed in the United States. Each of the seven engines on New Glenn’s booster produces 550,000 pounds of thrust.

To understand why this engine is so special, and why it took so long to build, one has to understand how different rocket engines work.

Most rocket engines, like the Merlin engines on SpaceX’s Falcon 9, use a “gas generator” or “open cycle.” This is a simpler, highly reliable design. It’s like a small, separate rocket engine bolted to the side, which burns a tiny amount of fuel and oxygen. The hot exhaust from this “gas generator” is used to spin the main engine’s pumps (the turbopumps). That exhaust is then “dumped overboard,” often visible as a sooty black smoke trail. It’s effective, but it’s wasteful. That dumped exhaust is propellant that isn’t creating thrust.

The BE-4 uses a “staged combustion” or “closed cycle.” This design is far more efficient but also far more complex. In a staged combustion engine, all the propellant goes through the main chamber. It does this by “pre-burning” a small amount of fuel and oxygen at extremely high pressure. The hot, high-pressure exhaust gas from this pre-burner is used to spin the turbopumps. But instead of being dumped overboard, this hot gas is then fed back into the main combustion chamber, where it mixes with the rest of the propellant and is burned again to produce thrust. There is no waste.

The BE-4 is a specific type of staged combustion: “oxygen-rich” (ORSC). This means its pre-burner runs with a lot of oxygen and only a little fuel. This creates an exhaust gas of hot, high-pressure, pure oxygen. This is an engineer’s nightmare. Hot, high-pressure oxygen is one of the most corrosive substances in the universe. It will burn and destroy almost any metal it touches. The Soviet Union mastered the special metallurgy to handle this in the 1970s, but the U.S. never did. For Blue Origin to build the BE-4, it had to solve this incredibly difficult materials science problem.

This technical challenge is why the BE-4’s development was famously long and troubled. For years, the program was plagued by “turbopump issues, overheating, combustion instability,” and engines that couldn’t survive their full-duration test firings. These delays were a strategic bottleneck for the entire U.S. launch industry.

The BE-4 wasn’t just holding up New Glenn. It was also holding up the United Launch Alliance’s (ULA) new rocket, Vulcan. For decades, ULA’s Atlas V rocket was the backbone of U.S. national security launch, but it flew on Russian-made RD-180 engines. After Russia’s 2014 invasion of Ukraine, it became a national security imperative to end this reliance. ULA chose the BE-4 to power its new, all-American Vulcan rocket. This meant the BE-4’s delays weren’t just a commercial problem for Jeff Bezos; they were a national security problem for the Pentagon.

The core of the development problem was reportedly cultural. Sources described the BE-4 program as “hardware poor.” This means the company wasn’t building and testing enough engines. The “test-fail-fix” loop was painfully slow. A single explosion on the test stand could halt all progress for months while the team conducted analysis, because there wasn’t another engine ready to take its place.

This culture, this “hardware poor” development cycle, is the direct origin story of Stoke Aerospace. The founders of Stoke, Andy Lapsa and Tom Feldman, were senior propulsion engineers at Blue Origin. They lived through the BE-4’s development. They saw the “hardware poor” approach firsthand and concluded it was the wrong way to build a rocket. The BE-4’s long, difficult birth didn’t just create an engine; it created a direct, philosophically-opposed competitor.

After years of setbacks, Blue Origin finally solved the BE-4’s problems. The engine flew successfully for the first time on ULA’s Vulcan in January 2024. It then flew on New Glenn’s debut in January 2025. By mid-2024, production at Blue’s Huntsville, Alabama factory was visibly ramping up. The bottleneck was finally broken.

The BE-4’s fuel, Liquefied Natural Gas (LNG), or methane, is also a deliberate choice for reusability. Unlike traditional kerosene, methane burns very cleanly. It leaves behind no “coking,” or sooty residue. Kerosene-fueled engines (like the Falcon 9’s Merlin) must be extensively cleaned and refurbished after each flight to remove this soot, a process that takes time and money. A methane-fueled engine, in theory, can be refueled and reflown almost immediately, simplifying rapid reuse.

The Path to Recovery: Failure and Success

With the BE-4 engine finally working, New Glenn was ready to fly.

The maiden flight, NG-1, launched on January 16, 2025. It was a partial success. The rocket achieved its primary objective, successfully reaching orbit and deploying its test payload, a prototype of the company’s “Blue Ring” orbital-transfer vehicle.

But the secondary objective, and the one the world was watching, failed. The booster, named So You’re Telling Me There’s a Chance, was lost during its descent. Telemetry froze during the re-entry burn, and the booster never made it to the Jacklyn. The engine re-light sequence, the most complex part of the landing, had failed.

Ten months later, on November 13, 2025, came the second flight, NG-2. This mission was a “full mission success.” The rocket flawlessly deployed NASA’s ESCAPADE probes on their path to Mars. Then came the landing. The new booster, Never Tell Me theOdds, executed a picture-perfect propulsive landing, touching down softly on the Jacklyn.

This 10-month turnaround between the landing failure of NG-1 and the landing success of NG-2 is a critical, positive data point. It proves that whatever the company’s past development issues, its operational “test-fail-fix” loop is rapid and effective. The NG-1 failure, while public, provided the rich, real-world flight data that the “hardware poor” ground-test program had been missing. The team diagnosed the re-light problem, implemented fixes, and flew a perfect mission less than a year later. This success unlocked a massive amount of confidence, both internally and, more importantly, from its customers.

The ‘Jacklyn’ and the Scrapped-Ship Saga

The story of the Jacklyn landing platform is a bizarre but perfect microcosm of Blue Origin’s entire development philosophy – its ambitious flaws and its eventual, hard-won pragmatism.

The barge that caught the booster in November 2025 is, in fact, the second vessel to bear the name Jacklyn, a tribute to Jeff Bezos’s late mother.

The original Jacklyn was not a barge at all. In 2018, Blue Origin bought a 180-meter, 600-foot-long roll-on/roll-off cargo ferry named Sea Chieftain. The plan was wildly ambitious: they would convert this massive, self-propelled ship into a hydrodynamically stabilized landing platform. The idea was that the ship could steam to the recovery zone at high speed (not be slowly towed like a barge) and, more importantly, its stabilization technology would actively counteract the roll of the ocean. It would “catch” the rocket even in rough seas. This was a classic Blue Origin attempt to engineer a “perfect” solution on paper, one that would increase launch-window reliability by making landings less dependent on weather.

It proved tobe a 4-year-long dead end. The conversion was far more complex than anticipated. After four years of work and millions of dollars, Blue Origin abandoned the entire project. In 2022, the original Jacklyn was unceremoniously towed to Brownsville, Texas, to be scrapped.

This decision marks the pivot to the “new Blue Origin.” The company abandoned its “perfect” but non-functional solution and embraced a “good enough” one that worked. They built a new, much simpler, 116-meter-long unpowered flat barge, very similar to the ones SpaceX had been using successfully for years. This new barge, officially Landing Platform Vessel 1, inherited the Jacklyn name. It became operational in 2024 and is the platform that successfully caught Never Tell Me the Odds. The saga is a perfect lesson: a pragmatic, proven solution that gets you to the launch pad is infinitely better than a “perfect” one that stays in the shipyard. This shift to pragmatism is what ultimately enabled Blue Origin’s 2025 triumph.

Stoke Aerospace: The Hare’s Radical Shortcut

The Protégés’ Gamble

While Blue Origin was slowly and painfully converting its development “tortoise” into an operational vehicle, a new “hare” entered the race. Stoke Aerospace was founded in 2019 by CEO Andy Lapsa and CTO Tom Feldman.

This is the critical detail: Lapsa and Feldman are not just random entrepreneurs. They are protégés from deep inside Blue Origin’s “temple”: the propulsion department. Andy Lapsa was Blue’s Director of BE-3 and BE-3U engines (the engines on New Shepard and New Glenn’s upper stage) and also worked on the BE-4. Tom Feldman was a senior design engineer for the BE-4’s all-important turbopump and thrust chamber.

They founded Stoke because they looked at the more than 150 other rocket startups and, as Lapsa has stated, “couldn’t find another startup building a credible path to” 100% rapid reusability. They believe this is the only sustainable future for the industry.

This makes the Stoke-versus-Blue-Origin story deeply personal. The founders of Stoke looked at the very engines they were building at Blue Origin and concluded that the entire architecture – a partially reusable rocket with an expendable second stage – was a dead end. They left to build a company founded on a direct philosophical break from their former employer.

A Different Philosophy: The 24-Hour Rocket

Stoke is not just building a reusable rocket; it’s building a fully and rapidly reusable rocket. The company’s “holy grail,” the central goal that informs every single engineering decision, is an “aircraft-like” operational model. Their target is a 24-hour turnaround from landing to re-launch.

This philosophy is built on a simple economic argument, laid out by CEO Andy Lapsa. Launch has two primary costs:

1. The Manufacturing Cost: Lapsa calls this the “paper cup” problem. Rockets are multi-million-dollar precision machines. It “makes no sense to throw them away” after one use. Even a “partial reuse” model, like New Glenn’s, is still a “partially disposable” model. For every single launch, New Glenn’s factory must build a brand-new, expensive second stage.
2. The Fixed Costs: This, Lapsa argues, is the real driver. The cost of infrastructure – factories, test sites, launch complexes, and the salaries of thousands of engineers – runs into the billions of dollars. The only way to pay down this massive fixed cost is with a high flight frequency.

This leads to Stoke’s virtuous cycle: 100% reusability allows for a 24-hour turnaround. A 24-hour turnaround enables a high flight frequency. A high flight frequency amortizes the fixed infrastructure costs over hundreds or thousands of launches, which radically lowers the price for everyone.

Stoke is making a high-stakes bet that the true bottleneck in space launch is not the marginal cost of a rocket; it’s the amortization of the fixed cost. You cannot launch a thousand times a year if you are limited by a factory that has to build a thousand new second stages. Therefore, 100% rapid reusability is not just a feature; it’s the only way to make the economics of space truly scalable. This is a direct shot at New Glenn’s model, which Stoke argues will be forever limited by its second-stage factory.

Anatomy of a Game-Changer: The Nova Rocket

To achieve this 24-hour turnaround, Stoke designed a rocket, Nova, that looks and works like nothing else on Earth.

First, it’s important to understand what Nova is not. It is not a New Glenn competitor. Nova is a medium-lift rocket. It stands 40.2 meters (132 feet) tall and 4.2 meters (14 feet) wide. This is significantly smaller than New Glenn’s 98-meter height and 7-meter diameter.

Their payload capacities are in entirely different classes. New Glenn’s reusable capacity to LEO is 45,000 kg. Nova’s primary reusable capacity is 3,000 kg (3 tons), with a maximum expendable capacity of 7,000 kg (7 tons).

Stoke is not trying to beat New Glenn at the heavy-lift game. It’s competing on a different axis entirely: reusability and speed. It is targeting a gap in the medium-lift market, competing more directly with vehicles like the SpaceX Falcon 9 or Rocket Lab’s forthcoming Neutron.

The First Stage: Zenith’s Full-Flow Power

Nova’s first stage is powered by seven Zenith engines. Like the BE-4, they burn methalox (methane/LOX). But in a move of extreme technical ambition, Stoke chose an even more advanced engine cycle: Full-Flow Staged Combustion (FFSC).

This is the “pinnacle” of rocket engine design, and it’s important to understand the difference.

• Blue Origin’s “oxygen-rich” (ORSC) BE-4 runs hot, corrosive oxygen through its oxygen pump’s turbine.
• A “fuel-rich” engine (like the Space Shuttle’s main engines) runs hot, sooty fuel through its fuel pump’s turbine. Both are very hot and hard on the hardware.
• Full-Flow (FFSC) is the best of all worlds. It has two separate pre-burners and two turbines. One pre-burner is oxygen-rich and spins the oxygen pump. The other is fuel-rich and spins the fuel pump.

The result is that everything runs cooler and at lower pressures. The turbines are not exposed to such an extreme, corrosive environment. The engine is less stressed, which is a massive advantage for achieving a long life and, most importantly, rapid reusability.

This is an audacious choice. This is the most complex and efficient engine cycle ever conceived. The only other company on Earth to successfully develop and fly an FFSC engine is SpaceX, with its Raptor engine for Starship. In June 2024, Stoke successfully hot-fired its Zenith engine, becoming “one of only two entities globally to successfully develop and test” this type of engine.

This decision shows Stoke’s confidence. The venture-backed startup, founded by ex-Blue Origin engineers, chose to tackle a technology (FFSC) that is more advanced than the one their multi-billion-dollar former employer (ORSC) chose. Lapsa and Feldman didn’t just leave to build a rocket; they left to build a better, more reusable engine.

The Revolution is in the Second Stage: Andromeda

If the first stage is ambitious, the second stage is revolutionary. This is the part of the rocket that goes to orbit, and it’s the part that Stoke is betting its entire company on.

The second-stage engine is named Andromeda. It burns hydrolox (liquid hydrogen and liquid oxygen). But it is not a traditional engine. It has no bell nozzle. Instead, Andromeda is a “ring” of 24 small, 3D-printed thrusters arranged around the circular base of the vehicle.

This design is a brilliant example of engineering integration. A traditional second stage has several heavy, separate systems: a main engine for thrust, a heavy gimbal mechanism to tilt the engine for steering, and a separate (and on reusable vehicles, very heavy) heat shield for re-entry.

Stoke’s Andromeda merges all three systems into one.

• Thrust: The 24 thrusters fire together to provide main propulsion.
• Steering: The rocket steers using “differential throttling.” Instead of a heavy gimbal, it simply increases the power of the thrusters on one side of the ring and decreases it on the other, allowing it to “push” the vehicle in any direction.
• Heat Shield: The entire engine and base assembly is the heat shield.

This “ring” design, combined with a “center passive bleed,” also creates an “aerospike engine-like effect.” Aerospikes are a highly efficient engine concept, studied by NASA for decades but largely abandoned as too complex, that can automatically adjust to the changing air pressure as the rocket climbs. Stoke has, in effect, revived and implemented this advanced concept.

Solving Re-entry: The Regenerative Heat Shield

The Andromeda engine ring is only half of the solution. The other half is how Stoke’s second stage survives the “fiery journey back to Earth.” This is the hardest problem in 100% reusability, and Stoke’s solution is the single most innovative technology in its arsenal.

The old solution, used by the Space Shuttle, was to cover the vehicle in thousands of brittle, black ceramic tiles. These tiles were a maintenance nightmare. They were fragile, expensive, and time-consuming to inspect and replace. They are the opposite of rapid reusability.

Stoke’s solution is a “robust” metallic heat shield. This shield doesn’t just passively absorb heat; it actively cools itself. This “regenerative” or “active” cooling system is Stoke’s holy grail.

Here is how it works, in simple terms:

1. During re-entry, the atmosphere hitting the shield at 17,000 mph creates intense heat, enough to melt any metal.
2. Stoke pumps its fuel – extremely cold liquid hydrogen (which is -423°F) – through a network of tiny, hair-thin channels and pipes inside the metal heat shield.
3. The liquid hydrogen acts just like a car’s radiator coolant. It circulates through the shield, absorbing the intense re-entry heat and keeping the metal well below its melting point.
4. This process, of course, instantly boils the liquid hydrogen, turning it into a very hot, high-pressure gas.
5. This hot gas is then harnessed. It’s channeled to spin the engine’s turbopumps and is used as propellant for the final landing burn.

This system is unbelievably elegant. It turns the vehicle’s single greatest problem (re-entry heat) into its greatest solution (the energy needed to power its own landing).

This robust metal shield is “designed for minimal refurbishment.” It can, in theory, “be ready to fly again immediately.” This is the core technology that makes a 24-hour turnaround plausible, rather than just a marketing slogan.

This design also explains the second stage’s fuel choice. Liquid hydrogen is not just used for its high performance (which it has). It is required for the heat shield to work. No other fuel is cold enough to absorb the massive thermal load of orbital re-entry. This shows that Stoke’s entire second stage – its fuel, its ring-engine, and its heat shield – was designed from day one as one single, integrated system.

Proving the Concept: From Hopper to Hotfire

This all sounds like science fiction. But Stoke’s philosophy is “try, perhaps failing, learning, and then quickly trying again.” This is the “hardware-rich” approach, the direct antithesis to the “hardware-poor” culture its founders left behind at Blue Origin.

In September 2023, Stoke put its most radical ideas to the test. It built a full-scale prototype of its second stage, nicknamed “Hopper2.” It was a 15-second flight. The prototype rose just 30 feet off the pad, hovered, and then landed softly.

It may have been the most efficient and data-rich 15-second test flight in aerospace history. It wasn’t about altitude; it was about proving the physics. In those 15 seconds, Stoke successfully demonstrated all of its highest-risk technologies at the same time:

1. It proved differential throttling worked. It was the “first flight test of a reusable VTVL rocket that uses differential throttling for attitude control.” The vehicle was stable; the no-gimbal steering worked.
2. It proved the active heat shield worked. It was the “first flight test of a reentry vehicle that uses an active regeneratively cooled heat shield.” The “money shot” from the test videos was undeniable: icecould be seen forming on the outside of the heat shield while the engines were firing. This was tangible, visual proof that the liquid hydrogen cooling system was working so well that it was overpowering the heat of its own engines, “at 100% of the expected heat load.”

This single, 15-second test retired the biggest technical questions and risks facing the company. It proved their core physics was sound. This is the “hardware-rich” philosophy in action. They didn’t need to go to orbit to prove their technology; they just needed to go 30 feet.

This success immediately unlocked a wave of progress and, critically, funding. Stoke’s pace in 2024 and 2025 has been blistering. They held a successful first hotfire of the first-stage Zenith engine (June 2024). They announced the upgraded Andromeda 2 upper stage (February 2025). They hit 100% power on Andromeda hotfires (April 2025).

The payoff for this rapid, proven progress came in October 2025. Stoke announced it had raised a massive$510 million in a Series D funding round, giving it the capital to move from development into full production.

Building the Pad: From Mercury to Nova

As Stoke’s hardware has come together, so has its launch site. The company is building its orbital launch pad at Cape Canaveral’s Launch Complex 14 (LC-14).

This is not just any launch pad. This is hallowed ground. LC-14 is where John Glenn launched on his Friendship 7 mission in 1962 to become the first American to orbit the Earth. The pad has been dormant, a monument to the past, for over 50 years.

Stoke is “bringing the lights back on.” As of late 2025, construction is progressing at a rapid pace. The massive flame diverter is already complete. The integration hangar is nearly finished. The launch mount and the four lightning protection towers are rising from the ground.

The symbolism is powerful and unmissable. Blue Origin named its rocket New Glenn. But Stoke Aerospace, the startup founded by Blue’s own protégés, is rebuilding and launching from John Glenn’s actual, historic launch pad. The startup has claimed the physical legacy of the very icon the parent company claimed in name.

Tale of the Tape: A Comparative Analysis

The technical and philosophical differences between the two companies are stark. They are building two completely different classes of vehicles, based on two completely different economic theories.

The divergence in philosophy starts at the engine. Blue Origin chose the ORSC cycle for the BE-4, a design it said would “lower development risk” compared to other high-performance architectures, even though it still proved immensely difficult to master. Stoke, leveraging the propulsion expertise of its founders, chose the highest-risk, highest-reward FFSC cycle for Zenith. They are betting that the superior performance, lower-stress operation, and enhanced reusability of FFSC are required to achieve their 24-hour turnaround goal.

Reusability: Partial vs. Full

This is the central debate. New Glenn reuses its first stage and expends its second. Stoke Nova is designed for 100% reuse.

The question for the market is one of pragmatism versus revolution. Is Blue Origin’s “partial reuse” a logical, evolutionary step that gets them flying, serving customers, and generating revenue today? This revenue, in turn, can fund “Project Jarvis,” their long-term plan for a future reusable second stage.

Or, as Stoke’s CEO argues, is this “stepping stone” a strategic dead end? Does an expendable second stage bake in a permanent production bottleneck that will forever cap New Glenn’s flight rate and keep its costs high? Stoke is betting that any rocket not designed for 100% rapid reusability from day one will eventually be “left behind.”

Re-entry Technology: Propulsive Landing vs. Active Cooling

The re-entry solution for the second stage is the clearest technical divide.

• Blue Origin’s solution: Throw the problem away. The second stage is expendable, so it simply burns up. This is a 100% reliable, zero-risk solution… that costs millions of dollars per flight.
• Stoke’s solution: Solve it with novel physics. The active regenerative heat shield is a massive technical gamble.

Blue’s approach is lower risk today. It’s what allowed them to reach orbit and start serving customers in 2025. Stoke’s approach, if it pays off, is the one that could fundamentally change the economics of launch and make Blue’s (and SpaceX’s Falcon 9) architecture economically obsolete.

Two Rockets, Two Markets

These significant technical differences are not accidental. They exist because New Glenn and Nova are designed to serve two almost entirely different markets.

The Heavy-Lift Arena: New Glenn’s Battlefield

New Glenn’s 45-ton LEO capacity and, most importantly, its 7-meter fairing, position it squarely in the “heavy-lift” market. Its customers are a small, elite group launching large, high-value payloads.

1. Amazon’s Project Kuiper: This is New Glenn’s “anchor tenant.” Amazon’s massive satellite internet constellation needs dozens of heavy launches.
2. National Security (NSSL): The U.S. Space Force has a constant need to launch large, classified reconnaissance and communications satellites. New Glenn is now certified to compete for these lucrative NSSL contracts.
3. NASA & Deep Space: The rocket is designed for interplanetary missions like the ESCAPADE launch to Mars. Critically, it will also be the launch vehicle for Blue Origin’s own Blue Moon lunar lander, a key part of NASA’s Artemis program.
4. Commercial Telecom: The bread-and-butter work of launching massive communications satellites to high-energy GTO orbits.

In this arena, New Glenn’s direct competitors are SpaceX’s Falcon Heavy and ULA’s Vulcan.

New Glenn’s business model is a classic example of vertical integration. Its primary, guaranteed customer is, in effect, itself. Jeff Bezos’s Amazon needs to launch thousands of Kuiper satellites. Jeff Bezos’s Blue Originneeds to launch its Blue Moon lander. So, Jeff Bezos’s Blue Origin built the perfect rocket (New Glenn) to service his other companies. This massive, stable internal demand provides a revenue base that de-risks the entire multi-billion-dollar rocket program, allowing it to then compete for external government and commercial contracts.

The On-Demand Niche: Nova’s Target

Stoke Aerospace is not targeting the heavy-lift market at all. It is trying to create a new market, one built on “high-frequency” and “on-demand” access to space.

The primary customer for this is the U.S. military. The U.S. Space Force has a growing need for “Tactically Responsive Space” (TacRS). This is the ability to launch a satellite on extremely short notice – for example, in 27 hours from a “go” command, as was demonstrated in a 2023 test. The purpose is to be able to react to on-orbit threats or to rapidly replace a critical spy or communications satellite that is damaged or destroyed during a conflict.

A traditional rocket, which takes weeks or months to stack and prepare, is useless for this mission. Stoke’s 24-hour turnaround goal is the direct technical solution to this emerging military requirement. A rocket that can be “refit, refuel, refly” like an airplane is the only way to make “responsive launch” a reality.

The Space Force has already validated this fit. In 2025, it selected Stoke – a company that had not yet flown to orbit – for its National Security Space Launch (NSSL) Phase 3 Lane 1 contract. This program is designed specifically to bring in emerging providers who can offer new, “responsive” capabilities.

Nova’s reusable second stage also unlocks a market that doesn’t even exist today: “downmass,” or returning things from space. This includes “space cargo logistics,” capturing and de-orbiting space debris, or even capturing and repairing a friendly satellite and moving it to a new orbit. This is a service no other rocket (except the much larger Starship) is even designed to offer.

Stoke is betting that the next big market in space is not price-per-kilogram, but time-to-orbit. The Space Force’s TacRS program is this new market, and Stoke is the first company with a credible engineering solution.

The Specter of Starship

No analysis of the modern launch market is complete without acknowledging the elephant in the room: SpaceX’s Starship. It is the specter that looms over the entire industry, and it creates existential pressure on both New Glenn and Nova.

Starship is a “competitor to all.” It is both a heavy-lifter and a 100% reusable vehicle.

• It is far larger than New Glenn (over 400 feet tall) and has far more capacity (a design goal of 150+ tons to LEO, versus New Glenn’s 45).
• It shares Stoke’s philosophy of 100% rapid reusability, also using methane-fueled FFSC engines.

If Starship achieves its goals, it could theoretically “do it all.” It could out-lift New Glenn and out-reuse… everyone. It could absorb the heavy-lift market, the medium-lift market, and the responsive-launch market through sheer scale and (projected) low cost.

This puts both companies in a race against SpaceX. For New Glenn, Starship’s 100% reusability makes Blue’s partial reusability look dated on the very day it became operational. For Stoke, Starship’s 100% reusability validates their core thesis, but its massive scale threatens to make their 3-ton Nova rocket a “niche” product before it ever flies.

Summary

The launch landscape of late 2025 is fractured, dynamic, and more competitive than at any point in history. The “versus” between Blue Origin and Stoke Aerospace is not a simple competition; it’s a clash of generations, philosophies, and strategies.

Blue Origin, the “tortoise,” has finally crossed the finish line. The successful NG-2 mission in November 2025 was a triumph of its “step by step, ferociously” approach. It has arrived as an operational, validated, heavy-lift provider. Its evolutionary partial-reusability model is now a tangible, bankable competitor to SpaceX, offering a vital alternative for NASA, the Department of Defense, and the entire commercial space industry.

Stoke Aerospace, the “hare,” is the revolutionary challenger. It has not yet reached orbit, but in many ways, it has already won its first, most important battles. It has proven its revolutionary core technologies: the high-performance FFSC Zenith engine and the “impossible” actively-cooled Andromeda upper stage. It is not trying to compete with New Glenn’s heavy-lift market; it is trying to create a new one – responsive, on-demand launch – built on the 100% rapid reuse philosophy that its founders carried with them from their time at Blue Origin.

This is a battle between a pragmatic incumbent and a radical innovator. The next five years will determine which path wins: Blue’s evolutionary heavy-lift, Stoke’s revolutionary rapid-reuse, or the all-encompassingrevolution of Starship. The road to space now has multiple, competing lanes.