Supersonic

Saab has unveiled its roadmap for its Autonomous Collaborative Platform (ACP) program, a stealthy, supersonic ‘fighter drone,’ which could enter service in the 2030s with the Swedish Air Force and potentially other customers. The aerospace and defense company is already working on two uncrewed technology demonstrators and today presented a full-scale mock-up of an operational drone that those two aircraft could inform. This drone, compared to the U.S. Air Force Collaborative Combat Aircraft (CCA), for example, is a higher-end proposition, more advanced, larger, and with superior performance than those being test flown in the United States.

TWZ was among other members of the media who were briefed on the ACP program by Peter Nilsson, the head of Saab’s Advanced Programs business unit. He was talking at Malmen Air Base in Sweden, during an event to celebrate the Swedish Air Force’s 100th anniversary.

As for the name, Nilsson confirmed that, before settling on ACP, Saab had used the Collaborative Combat Aircraft (CCA) and Unmanned Aerial System (UAS) nomenclature. Meanwhile, the ACP falls under Sweden’s overarching KFS project, which stands for Koncept för Framtida Stridsflygplan, or Concept for Future Combat Aircraft.

The most significant element of the announcement was the full-scale mock-up of what Saab is calling aircraft A3. The idea of this is to show how a potential high-end ACP could look, and the kinds of capabilities it might bring, provided the company is awarded a development contract.

Broadly speaking, aircraft A3 has a lot in common with a previous concept that the company released back in 2024.

The concept retains the same tailless, stealthy configuration, with significant internal capacity for fuel and internal stores. The stealthy, chisel-type DSI air intakes remain on either side of the fuselage, but the prominent bulge roughly above where the engine nozzle would be is removed. The overall geometry remains similar: a sleek, blended wing/body configuration with cropped wings and a prominent chine running around the arrow-like forward edges, giving it something of a resemblance to the Cold War-era Saab Draken fighter, with its distinctive double-delta wing.

In the meantime, Saab is working on aircraft A1 and A2, uncrewed technology demonstrators that are being funded by the Swedish Ministry of Defense.

The first of these, A1, is expected to fly within the next 15 months,” according to Nilsson. The defense ministry called upon Saab to “go from concept to first flight within 36 months,” providing what Nilsson described as a “quite challenging” timeline.

Aircraft A1 uses the same GE Aerospace F414 engine that powers the Saab Gripen E/F crewed fighter. The turbofan produces around 22,000 pounds of thrust and will ensure A1 has supersonic performance.  However, for Saab, the main goal of A1 is to demonstrate that the company can build and fly a low-observable drone.

Saab provided imagery of wind-tunnel models of the A1. Overall, it appears loosely similar to the A3 mockup, with the exception of the twin, outward-canted tailfins. Aircraft A1 will have capacity for an internal weapons bay, although it will not be used for stores release tests. The next test article, aircraft A2 will have an internal weapons bay, and will presumably be used to test ordnance. Otherwise, A2 will be used for tests of other advanced technologies, including new materials and sensors.

No artwork of aircraft A2 was provided, but Nilsson said it will be “not quite” identical to A1, in terms of appearance. It will also be powered by the F414.

The F414 was selected due to its availability and the fact that the company has plenty of experience with the engine due to the Gripen E/F program. Saab is looking at other potential powerplants for the A3, but acknowledged that, should Sweden buy a productionized ACP, the engine commonality would be a big advantage, including, for example, when an engine needs to be changed at a remote airbase. This kind of maintenance is central to the Gripen concept of operation and would be retained for the ACP.

Saab is contracted until 2030 to develop the A1 and A2 demonstrators. What happens next will depend on the Swedish Ministry of Defense, and there is currently no agreement for a follow-on ACP contract, which would see the design advanced to a production-oriented prototype like the A3.

“We have floated the view that this would be a great asset to the Gripen E, but right now there is no commitment,” Nilsson remarked. Saab envisages the Gripen E serving as a tactical mission commander for one or more ACPs, working in conjunction with the company’s GlobalEye airborne early warning and control (AEW&C) aircraft, a type also ordered by Sweden. Outside of Sweden, the drone could work with a wide variety of other crewed platforms, too.

Pending investment from the Swedish government, Saab may decide to use its own funds for early development of the A3. However, Nilsson noted that “if a customer does not come along I don’t know when my CEO will stop me spending — you need a customer to buy into this.”

Saab’s broader ACP vision is based on an advanced platform that offers both low-observable features and supersonic performance.

The resulting drone should be capable of undertaking “high-risk missions in heavily defended airspace.” As well as air-to-air combat, missions would include electronic warfare, suppression of enemy air defenses, and deep precision strike.

If Sweden buys into the idea, a development contract could be expected around 2030. Thereafter Saab thinks it could have the A3 aircraft in the air sometime in the early 2030s, leading to initial operational capability from the mid-2030s.

With the ACP program, Saab hopes to stake its claim as the “first-mover in the segment” for high-end ‘loyal wingman’-type aircraft.

But even if the Swedish Air Force isn’t swayed by Saab’s ACP offer, the company is seeing the related spiral development as fundamental to its future as a builder of crewed combat aircraft, too.

The same basic architecture now being developed for the ACP could provide a technological and conceptual base for a future (crewed) Gripen successor. This would be required by the Swedish Air Force sometime after 2055. If there is demand, Saab says it could start development of such an aircraft in the mid-2030s.

A rendering of a potential future crewed combat aircraft that appeared in Saab’s presentation reveals a slightly more detailed version of a concept shown in the past. Namely, a design apparently tailored for high speed, as well as low observability. Some of the same features found in the A3 concept — notably the overall blended wing/body and cropped wings — appear in the crewed combat aircraft, although this adds outward-canted tail surfaces, mounted on booms that project relatively far beyond the engine nozzle. The nose and forward fuselage bear a resemblance to the F-35, and, overall, the aircraft seems to be around the same size as the U.S. design, perhaps a little larger.

For its part, the Swedish Air Force is still weighing up whether it wants to pursue a crewed successor to the Gripen, if it will abandon crewed fighters altogether, or if it will seek to join a foreign sixth-generation fighter program. A decision on this is likely sometime between 2028 and 2030.

Speaking to journalists at Malmen today, Brigadier-General Niclas Magnusson, the deputy commander of the Swedish Air Force, called for closer collaboration between the service and industry as Sweden seeks to define its future air combat requirements.

“We have to research and find the limits of what we are able to do,” Magnusson said, adding that he expected the future Swedish Air Force to field both crewed and uncrewed platforms.

That decision is still to come but will also be informed by the relative costs of the Gripen (more of which may still be acquired), higher-end drones, and potential future crewed platforms.

When it comes to the ACP, Nilsson suggested that the life-cycle cost will be around a third that of the Gripen, although acquisition cost won’t be as low as that.

“The problem is that this bloody aircraft is too low cost,” Nilsson added, pointing to the Gripen E.

Ultimately, the cost of the ACP will depend on the degree of capability that the customer demands.

Potentially, a single ACP could cost half as much as a Gripen. Open-source reports suggest that the Gripen E typically comes with a flyaway cost of roughly $70-80 million.

If the ACP is to offer “high-end survival,” Nilsson explained, then a customer would likely be able to field two to three ACPs for each Gripen. The ratio “is not one to 10.”

While Saab also wants to offer the ACP to other Gripen E/F operators as a priority, the fate of the program remains heavily dependent on larger questions about the future of the Swedish Air Force.

The program gives Saab a solid, and potentially unique, entrance into the CCA space. As we’ve said for years, fourth-generation fighters can remain highly relevant when paired with CCAs — and with a drone as advanced as this, potentially even more so.

The ACP will still come with a significant cost, but that could be offset by reducing or eliminating the need for a fifth- or sixth-generation crewed fighter for certain air forces.

For now, Saab’s high-end loyal wingman remains a proposal rather than a committed production program, but the company is clearly positioning it as more than another experimental drone. The A1 and A2 demonstrators are intended to prove the technologies needed for a survivable, supersonic, low-observable uncrewed aircraft, while the A3 concept unveiled today illustrates where Saab believes those technologies could ultimately lead.

Whether Stockholm opts for a new Saab-developed crewed fighter, joins an international sixth-generation program, or moves toward a force built around a greater mix of crewed and uncrewed aircraft, the ACP work gives the country a way to explore those possibilities without committing to one of them yet.

Contact the author: thomas@thewarzone.com

X-Bow Systems, a company that made its name making solid rocket motors and small space-launch vehicles, has unveiled a new low-cost drone interceptor, named Buckler. The interceptor promises high-speed and a unit cost of less than $100,000, a price point that has only been approached by drone-like systems, not modern supersonic missiles.

The Buckler — named after a small shield of the Medieval and Renaissance eras — is designed to defeat Group 3 drones. As we have explained before, under the U.S. military categorization system, Group 3 is a very broad middle tier of drones that covers designs that weigh anywhere from 56 to 1,320 pounds and can fly at up to 18,000 feet, at speeds of 250 knots or less.

Iran’s now-infamous Shahed-136 long-range one-way attack drone, variants and derivatives of which are now in service in Russia and with several Iranian-backed proxies, falls into the Group 3 category.

While optimized for bringing down drones, the Buckler can also engage other aerial threats, including subsonic cruise missiles, under certain conditions. This is especially relevant as newer Shahed-derived designs, and many other long-range one-way attack munitions, increasingly blur the line between drones and low-end cruise missiles through the adoption of jet propulsion and higher-altitude flight profiles. Then there is the emerging group of low-cost cruise missiles being adopted in the United States and potential adversaries, as well as existing, more advanced types. Low-flying aircraft and helicopters would also likely be on the menu for this missile, even as a secondary capability.

The high speed of the missile also means that a single Buckler battery can engage targets more rapidly and respond faster over a given range. It also makes it possible for follow-up shots to be taken if an effector misses within a given timeframe.

The Buckler is one of the growing number of responses to the increasing threat of drone-and-missile barrages, which are exposing the limits of legacy air defense models. In conflicts in the Middle East and Ukraine, most notably, costly surface-to-air missile effectors are routinely expended, in significant quantities, against far cheaper incoming threats.

For years now, TWZ has been calling attention to the U.S. military’s concerning short-range air defense (SHORAD) gap, especially as drone threats have continued to expand and evolve.

“This is our answer to the call from the U.S. and its allies: affordable capability at scale,” X-Bow Systems’ CEO Jason Hundley told Axios.

“You can’t win a war of attrition trading million-dollar interceptors against thousand-dollar threats,” Hundley added.

The company is relying upon its own solid-rocket motor and propellant, allied with an airframe that’s also made in-house, which it says will bring down costs.

X-Bow Systems recently notched a successful flight test for the Buckler, the company says, demonstrating its propulsion system and flight characteristics after completing motor static-fire and igniter testing.

According to Axios, the Pentagon has also requested a briefing on the interceptor.

X-Bow is entering one of the fastest-growing segments of the defense industry. The company is already well established as a producer of solid rocket motors and, last year, secured a $105 million investment from Lockheed Martin to expand production and provide propulsion systems and related services.

The startup will now be hoping that the Buckler’s eye-catching price point of less than $100,000 per copy will set it apart among drone interceptors.

By way of comparison, the combat-proven Raytheon Coyote, in its Block 2 configuration, also primarily intended for the counter-drone mission, has a unit price of around $100,000, based on past reports. AeroVironment’s Freedom Eagle-1 (FE-1), which the U.S. Army picked last year to provide an additional layer of defense against longer-range one-way attack drones and other similarly sized uncrewed aerial systems (UAS), has a target unit cost of between $150,000 and $200,000. These are also notably slower and less responsive systems than the Buckler.

Freedom Eagle (FE-1) Next Gen C-UAS Missile

Toward the higher end of the scale, the cost of a Stinger short-range surface-to-air missile has historically been put at between $100,000 and $120,000, but reports in recent years have said that current-generation versions, including ones optimized for use against drones, can run up to $400,000.

In terms of more exquisite SHORAD solutions, the U.S. Army’s Enduring Shield is presently configured to fire AIM-9X Sidewinders, each of which has a price tag around $500,000. 

As for the kinds of threats that these effectors are intended to destroy, Shahed-type drones are typically understood to have a unit cost range measured in tens of thousands of dollars.

The Buckler is also intended to bring benefits in terms of speed and scalability of production. This should ensure that production facilities are able to ramp up quickly and, in response to demand, be able to increase the output accordingly. Applying the vertical integration approach, the company says it can address the “industrial-base bottleneck defense leaders cite as the top constraint on scaling interceptors.”

As demand for advanced missile propulsion accelerates, traditional production can’t keep up. Discover how X-Bow is delivering scalable, rapid solutions for urgent national security needs. #TechThisOut with @waltmac pic.twitter.com/nzSbikCz7X

— X-Bow Systems (@XBowSystems) May 7, 2026

Whether Buckler can deliver on its promised combination of performance, affordability, and production scale remains to be seen. But with militaries around the world urgently seeking cheaper ways to counter drones and cruise missiles that are appearing in greater numbers, X-Bow is entering the market at a particularly opportune moment.

Contact the author: thomas@thewarzone.com

A Russian Tu-22M3 strategic bomber crashed in Siberia’s Irkutsk region during a training flight, but all four crew members had managed to safely eject. The Soviet-era supersonic bomber has been used by Russia in combat operations in Syria and Ukraine.

FLIGHTS to New York could eventually take the same amount of time as it does to fly to Tenerife – and passengers might be onboard sooner than you think.

X-59 QueSST, nicknamed the “Son of Concorde” has been developed by NASA to travel as much as 300mph faster than current commercial flights.

At the speed of over 900mph, the aircraft could travel from London to New York in 3hr45 – far less than it does to get to some of the Spanish islands.

Currently, flights from the UK to New York take around 7hr30, on average.

With the jet it could be under four hours which is even quicker than a flight to Tenerife at 4hr30.

Most commercial flights currently operate at around 600mph but the aircraft is set to conduct test flights where it will reach supersonic speeds of 630mph at 43,000ft for the first time.

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After that, NASA said that “mission conditions” will follow where the jet will go even faster.

If successful, it is hoped that supersonic flights could launch by 2029.

Don’t worry about hearing a sonic boom either – despite the sound barrier sitting at 660mph, the aircraft have been designed to avoid this.

Instead it will create a sonic “thump”, which is “about as loud as a car door closing”.

Up until now, NASA has been conducting tests in wind tunnels or in the skies but at slower speeds.

The jet is dubbed the ‘Son of Concorde’ as Concorde was the world’s very first supersonic airliner that first flew passengers in 1976.

Concorde’s fastest recorded flight was on February 7, 1996, when British Airways flew Concorde from New York’s JFK airport to London Heathrow in two hours, 52 minutes, and 59 seconds.

Around 20 Concordes were created, but the fleet was grounded in 2003.

This was three years after the crash of an Air France flight, in which all passengers and crew were killed.

Low passenger numbers and high costs were also cited as reasons for the ending of Concorde.

When Concordes were flying they would often break the sound barrier, causing the shaking of windows and creating a loud noise that replicated thunder when passing overhead.

Fancy seeing a real Concorde plane? You can see retired ones at Manchester Airport, Aerospace Bristol or Brooklands Museum in Surrey.