The next stage in the evolution of the Gray Eagle Short Takeoff and Landing (GE STOL) drone sees General Atomics Aeronautical Systems, Inc. (GA-ASI) team up with South Korea’s Hanwha Aerospace for co-development and co-production of the uncrewed aircraft system, with work set to begin immediately. A demonstrator for the medium-altitude, long-endurance (MALE) drone has already operated from a South Korean amphibious assault ship, but the new partnership will see production of the Gray Eagle STOL for all customers taking place in South Korea.
GA-ASI and Hanwha Aerospace had an official signing ceremony at the Association of the U.S. Army’s (AUSA) main annual symposium today. That ceremony took place alongside GA-ASI’s company-funded Mojave STOL drone, which has been flying for years and is being used as a proof-of-concept demonstrator for the Gray Eagle STOL.
As for the Gray Eagle STOL, this is the latest iteration of GA-ASI’s MQ-1C Gray Eagle UAS. At the center of the Gray Eagle STOL is its ability to operate from remote or austere locations with rough strips and limited logistical support. GA-ASI says the aircraft will be able to operate from semi-improved surfaces, including dirt roads, open fields, beaches, and parking lots. The same capabilities render it suitable for flying from aircraft carriers and big-deck assault ships, too.
In the past, GA-ASI has described the Gray Eagle STOL as its “most rugged UAS design,” although it’s worth noting that the basic MQ-1C Gray Eagle for the U.S. Army already put something of a premium on efficiency and usability. The original MQ-1C Gray Eagle was tailored for warfare in the Middle East, uses a heavy-fuel piston engine instead of a turboprop, and can be operated by a cadre of enlisted soldiers.
Under the new joint initiative, GA-ASI and Hanwha plan to build a production-representative Gray Eagle STOL aircraft, which should take to the air in 2027. The companies will, in the meantime, establish a production line that will be able to provide the Gray Eagle STOL to customers in the United States and South Korea, as well as globally, and which should result in cost savings for the drone. The first deliveries to customers should take place in 2028.
“GA-ASI and Hanwha are committed to investing in this project and building development and production capabilities in South Korea,” said GA-ASI President David R. Alexander. “We’ll be leveraging the expertise of both companies to quickly bring the Gray Eagle STOL to global customers.”
“This landmark agreement marks the beginning of a new phase in U.S.-Korea defense cooperation, extending beyond traditional alliance structures to deliver next-generation, runway-independent UAS solutions that maximize commanders’ options in the face of evolving mission demands,” GA-ASI said in a statement.
The next steps will see GA-ASI and Hanwha Aerospace working closely together to complete the design phase for the drone and then establish a production facility in South Korea. The final assembly and manufacturing of the GE STOL will be the responsibility of Hanwha in South Korea, with GA-ASI handling the final integration. Meanwhile, GA-ASI will continue to produce other Gray Eagle models at its plant in San Diego, California.
GA-ASI says the new partnership “offers the fastest path with lowest risk to operational capability.”
“Co-producing GE STOL in South Korea and the U.S. will create jobs and help Hanwha secure talent in related fields as well as foster our domestic (Korean) UAS industry ecosystem,” said Jae-il Son, president and CEO of Hanwha Aerospace. “Hanwha is poised to become a comprehensive UAS company capable of executing everything from design to production and maintenance based on our capabilities, which span from fighter jet engines to radar and avionics equipment.”
For Hanwha, the Gray Eagle STOL also presents a way of gaining a foothold in the South Korean military. The country’s armed forces already operate a diverse drone fleet, including Israeli-supplied aircraft. However, on the domestic front, this segment is currently dominated by Korea Aerospace Industries (KAI) and Korean Air, both of which already build drones for the South Korean military.
However, GA-ASI has already been working closely with the South Korean Ministry of Defense as it continues to develop the Gray Eagle STOL drone.
Last year, the Mojave demonstrator was used in a demonstration when it took off from the Republic of Korea Navy’s amphibious landing ship ROKS Dokdo, as it was underway off the coast of Pohang, South Korea.
The Mojave has also been used for takeoff and landing trials aboard the British aircraft carrier HMS Prince of Wales in 2023.
Other milestones for the demonstrator drone have included live-fire testing at Yuma Proving Ground, Arizona, using the Dillon Aero DAP-6 Minigun, and operations from a dirt strip to prove its STOL credentials, something we have reported on before. The stated performance of the Mojave includes a takeoff run of 400 feet for intelligence, surveillance, and reconnaissance (ISR) missions, or 1,000 feet when armed with 12 Hellfire missiles.
Clearly, having Hanwha Aerospace onboard the Gray Eagle STOL program, including local production, should make the drone even more attractive to South Korea.
As well as operating from the two Dokdo class amphibious assault ships — the drone doesn’t necessarily need a catapult for launch or arresting gear for recovery — the Gray Eagle STOL could be a valuable addition to the South Korean military’s land-based units.
For the Republic of Korea Army, the Gray Eagle STOL’s runway independence would be a huge advantage during any kind of conflict with North Korea. In the past, GA-ASI has outlined the fact that the drone’s commanders “can choose virtually any bases of operation and take advantage of unconventional locations not normally affiliated with unmanned aircraft or aviation operations as an added level of survivability and surprise.”
In such a scenario, it would likely be in heavy demand for reconnaissance, surveillance, and target acquisition (RSTA), as well as strike. Meanwhile, its manned-unmanned teaming (MUM-T) capability could see it operate closely with the Republic of Korea Army helicopter fleet, including the AH-64E Apache.
The Gray Eagle STOL is also intended, from the ground up, to be rapidly deployed to remote locations by C-130 Hercules cargo aircraft, a type also operated by South Korea. GA-ASI says the drone can be ready to fly from austere locales in as little as 1.5 hours once rolled out the back of a C-130. This makes it ideal for different sorts of distributed and expeditionary operations.
As well as the aforementioned Mojave weapons, the Gray Eagle STOL is planned to be armed with launched effects, a capability that it inherits from the improved Gray Eagle 25M. The latter was developed to provide the U.S. Army with the option to procure a more advanced version of the MQ-1C, which would incorporate various enhancements to better meet the demands of a future conflict, likely to be expeditionary peer conflicts rather than a counterinsurgency fight.
GA-ASI has previously underlined the potential use of this drone to tackle enemy air defense systems in a large and very contested battlefield — just like the one that South Korea could face if it goes to war with its neighbor. In this scenario, the drone would lob its launched effects toward the air defenses before acting as a “quarterback,” relaying data gathered by the smaller drones to other friendly elements, be they aircraft, long-range fires, or other platforms.
At the same time, the growing questions around the survivability of drones like this need to be acknowledged. The Gray Eagle STOL and its relatives are potentially vulnerable even when faced by lower-end adversaries, a fact that has been underscored by the scale of losses suffered by U.S. MQ-9 Reaper drones when faced by Iranian-backed Houthi militants in Yemen. The use of LEs at standoff distances and the addition of self protection and electronic warfare pods, as well as combined force tactics, will help them in the fight in the years to come.
The Gray Eagle STOL would also port other advanced technologies over from the Gray Eagle 25M, including the EagleEye synthetic aperture radar, which can detect and track ground targets out to 50 miles and maritime targets out to 124 miles. GA-ASI is also working to introduce an increased-range active electronically scanned array (AESA) antenna, which is intended to allow it to operate beyond the weapons effects zone of many threat systems.
As we have highlighted in the past, the Gray Eagle STOL would also seem to offer a broad portfolio of capabilities that could be of particular relevance to the U.S. military as it prepares for a future high-end conflict, especially one fought in the Pacific against China.
In the past, GA-ASI has specifically said that the “Gray Eagle STOL might go with American forces into an expeditionary base deep downrange, co-locating with them as necessary to support missions, including delivery of supplies with the range to reach from island chain to island chain for units separate from the main body. Operating from a semi-prepared landing zone, a dirt road, or any paved surface, it expands commanders’ options.”
Other roles planned for the Gray Eagle STOL include logistics, and GA-ASI has explored the idea of underwing pods capable of carrying up to 1,000 pounds of cargo. This could be of particular interest for the U.S. military, as it looks increasingly at diverse distributed logistics chains as an essential requirement for supporting future operations in contested environments, especially in the context of a potential future high-end conflict, including in the Pacific.
With these kinds of peer and near-peer conflicts in mind, the Gray Eagle STOL is also intended to be more resilient to hostile electronic warfare jamming, especially to GPS networks. It will have vision-based navigation that can be used to overcome GPS jamming and have SATCOM anti-jam technologies.
Ultimately, the Gray Eagle STOL should emerge as a drone that’s able to fly a wide range of missions, from a variety of land bases and ships. It’s clear that, with their new partnership, GA-ASI and Hanwha Aerospace foresee interest from operators outside of the U.S. and South Korean militaries, too.
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