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Türkiye Expands T625 Gökbey Helicopter Fleet with Domestic Engines

Türkiye orders 57 additional T625 Gökbey helicopters featuring locally developed TEI-TS1400 engines, enhancing defense autonomy and export prospects.

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Türkiye’s Strategic Expansion of the T625 Gökbey Helicopter Fleet

Türkiye’s defense industry has made significant strides in recent years, with a clear focus on self-sufficiency and reducing dependence on foreign suppliers. One of the most prominent examples of this strategy is the T625 Gökbey Helicopters program. Originally conceived as part of the Turkish Light Class Utility Helicopter (TLUH) initiative, the Gökbey is a domestically developed, multi-role platform designed for both military and civilian applications.

The recent announcement at IDEF 2025 regarding Türkiye’s order of 57 additional Gökbey helicopters marks a pivotal moment for the program. This procurement not only strengthens the country’s defense capabilities but also underscores its commitment to indigenous production, particularly through the integration of the locally developed TEI-TS1400 turboshaft engine. With deliveries scheduled to begin in 2028, this move reflects long-term strategic planning in both defense and industrial policy.

As Türkiye continues to expand its aerospace capabilities, the Gökbey project serves as a case study in the intersection of technology, policy, and geopolitics. This article explores the background, technical specifications, recent developments, and broader implications of the latest Gökbey order.

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Background: The Road to Indigenous Helicopter Capability

The T625 Gökbey project was launched in 2013 under the auspices of the Turkish Light Class Utility Helicopter Program. The initiative aimed to replace aging platforms such as the Bell UH-1H and Sikorsky S-70B, which had long served in various branches of Türkiye’s armed forces. The broader goal was to reduce reliance on foreign-made systems and foster a sustainable domestic aerospace industry.

Development of the helicopter was led by Turkish Aerospace Industries (TUSAŞ), with significant contributions from other local firms including Aselsan for Avionics and TEI for engine development. The first prototype took flight in 2018, and by 2024, the helicopter had received civil certification, marking a major milestone in its development cycle.

The Gökbey is designed as a 6-ton class utility helicopter capable of performing a wide range of missions, from troop transport and medical evacuation to search and rescue and offshore operations. Its versatility and modular design make it a valuable asset for both military and civilian users.

Strategic Objectives and National Policy

Türkiye’s defense strategy has increasingly emphasized the importance of indigenous production. The Gökbey program aligns with this vision by incorporating locally developed components, including the TEI-TS1400 engine. This engine replaces the previously used LHTEC CTS800, a joint U.S.-U.K. product, thereby reducing exposure to export restrictions and political uncertainties.

The Presidency of Defense Industries (SSB) has played a central role in coordinating these efforts, ensuring that projects like the Gökbey receive the necessary funding, oversight, and strategic direction. The recent order of 57 helicopters is a testament to the government’s confidence in the platform and its readiness for large-scale deployment.

By investing in domestic capabilities, Türkiye aims to achieve strategic autonomy in critical defense technologies. This not only enhances national security but also positions the country as a competitive player in the global defense market.

Technical Specifications and Capabilities

The T625 Gökbey is engineered to deliver high performance across various operational scenarios. Its maximum takeoff weight is 6,050 kg, and it can reach speeds of up to 306 km/h. The helicopter has a standard range of 740 km, which can be extended to 948 km with auxiliary fuel tanks. Its service ceiling is 6,096 meters, allowing it to operate effectively in diverse environments.

One of the standout features of the Gökbey is its avionics suite, developed by Aselsan. The cockpit features a digital glass interface with touchscreen displays and advanced navigation systems. These technologies enhance situational awareness and reduce pilot workload, contributing to safer and more efficient operations.

The helicopter can accommodate up to 12 passengers in addition to two crew members. This makes it suitable for a wide range of missions, from transporting troops and supplies to conducting humanitarian and disaster relief operations.

“The Gökbey represents a leap forward in Türkiye’s aerospace capabilities, offering a versatile and reliable platform for both military and civilian users.”, Mehmet Demiroğlu, CEO of TUSAŞ

Integration of the TEI-TS1400 Engine

A key milestone in the Gökbey program has been the integration of the TEI-TS1400 engine. Developed by TUSAŞ Engine Industries (TEI), this turboshaft engine is a critical component in Türkiye’s efforts to localize defense production. The engine has undergone rigorous testing, including cold-weather trials in Sweden, to validate its performance under extreme conditions.

The TEI-TS1400 delivers the necessary power and efficiency for the Gökbey while eliminating the need for foreign-sourced propulsion systems. This not only enhances operational security but also contributes to economic savings. According to official sources, the use of domestic engines is expected to save Türkiye approximately $60 million annually.

With its successful integration, the TEI-TS1400 sets a precedent for future aerospace projects, potentially including unmanned aerial vehicles and other rotary-wing platforms.

Recent Developments and Future Outlook

The contract for 57 new Gökbey helicopters was signed at the IDEF 2025 defense exhibition, signaling a major expansion of the program. Deliveries are expected to begin in 2028, with units allocated to various branches, including six helicopters for the Coast Guard and a significant number for the Naval Forces Command.

In parallel with domestic orders, TUSAŞ has accelerated production capabilities, aiming to manufacture up to four helicopters per month. The company has also set an ambitious export goal of 400 units by 2026, reflecting growing international interest in the platform.

One notable development is a reported $1 billion offer from an unnamed foreign buyer for 32 Gökbey helicopters. While details remain confidential, such interest underscores the helicopter’s potential in global markets, particularly in regions like Southeast Asia and Africa.

Operational Testing and Certification

The Gökbey has undergone extensive testing to ensure its reliability and performance. In early 2025, it completed cold-weather trials in Sweden, where over 60 test flights evaluated its rotor systems, hydraulic performance, and engine behavior in sub-zero conditions. These tests were crucial for validating its suitability for diverse climates and operational scenarios.

In December 2024, the Gökbey received civil Certification, enabling its use in non-military applications such as emergency medical services and search-and-rescue missions. This certification opens up new markets and broadens the helicopter’s appeal beyond the defense sector.

The helicopter also made its international debut during Teknofest in Northern Cyprus, marking its first overseas flight and showcasing its capabilities to a global audience.

Conclusion

The expansion of the T625 Gökbey fleet represents a significant milestone in Türkiye’s defense and aerospace strategy. By investing in indigenous technologies and reducing reliance on foreign suppliers, the country is not only enhancing its national security but also laying the groundwork for a competitive export industry.

Looking ahead, the Gökbey is poised to play a central role in Türkiye’s defense modernization efforts. Its versatility, advanced technologies, and cost-effectiveness make it a strong contender in both domestic and international markets. As production ramps up and export deals materialize, the Gökbey could become a flagship product in Türkiye’s growing defense portfolio.

FAQ

What is the T625 Gökbey helicopter?
The T625 Gökbey is a domestically developed light utility helicopter designed by Turkish Aerospace Industries for both military and civilian use.

How many Gökbey helicopters has Türkiye ordered?
Türkiye recently ordered 57 additional Gökbey helicopters, bringing the total planned fleet to over 70 units.

When will the new helicopters be delivered?
Delivery for the new batch are scheduled to begin in 2028.

What engine powers the Gökbey?
The helicopter is powered by the TEI-TS1400 turboshaft engine, which is developed domestically by TUSAŞ Engine Industries.

Is the Gökbey available for export?
Yes, TUSAŞ is actively marketing the Gökbey internationally, with a potential $1 billion deal currently under discussion.

Sources

Army Recognition,
Aviation News,
Defence Turkey,
EDR Magazine,
Defence Security Asia,
Wikipedia,
TRT World,
Daily Sabah

Photo Credit: Defence Security Asia

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Defense & Military

GA-ASI and Spirit Defense Partner on FQ-42 Vengeance CCA

GA-ASI and Spirit Defense team up to manufacture the FQ-42 Vengeance airframe as the USAF targets 500 CCAs by 2032.

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GA-ASI and Spirit Defense Partner on FQ-42 Vengeance CCA

General Atomics Aeronautical Systems, Inc. (GA-ASI) and Spirit Defense have formed a strategic partnership to manufacture the airframe for the U.S. Air Force’s FQ-42 Vengeance Collaborative Combat Aircraft (CCA).

Announced in an October 23, 2026, press release, the agreement designates Spirit Defense, a Boeing Company, as a fuselage design-build partner. The collaboration aims to expand manufacturing capacity and establish production resilience as the U.S. Air Force (USAF) accelerates its uncrewed fighter program toward a goal of fielding hundreds of aircraft by the next decade.

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Scaling production for the uncrewed fleet

The partnership connects GA-ASI headquarters in San Diego, California, with Spirit Defense operations in Wichita, Kansas. Spirit Defense operates as an independent supplier to the defense industry, providing engineering, manufacturing, and lifecycle support for military programs. By integrating Spirit Defense into the supply chain, GA-ASI intends to reduce the risk of single points of failure and increase the industrial depth required for high-volume production.

GA-ASI recently completed a new low-observable paint facility to support the CCA program and stated it is currently positioned to deliver six aircraft per month to meet initial USAF objectives. The addition of Spirit Defense is designed to scale that output further.

David R. Alexander, President of GA-ASI, highlighted the strategic necessity of the agreement in meeting military requirements.

“We’re excited to be working with Spirit Defense. We’ve established our proven design, development, and manufacturing capability for the FQ-42. With Spirit Defense we add capacity, which is exactly the kind of production resilience our U.S. Air Force customer is looking for with its CCA ramp-up. This kind of partnership represents the scalable industrial base the Air Force and the U.S. Department of [Defense] are looking for from industry.”

Keith Schrader, President and CEO of Spirit Defense, confirmed the company’s readiness to support the airframe build.

“We’re proud to bring deep manufacturing expertise and proven capabilities to this important program. Our team understands the responsibility that comes with supporting critical national defense programs, and we’re ready to deliver for our customer and the warfighter.”

The FQ-42 Vengeance in testing and evaluation

The FQ-42 Vengeance is a purpose-built, fifth-generation uncrewed fighter developed to operate alongside crewed aircraft in semi-autonomous combat roles. The design features an internal weapons bay, low observability, and a modular architecture intended for the rapid integration of mission systems and autonomy software.

On September 18, 2026, GA-ASI delivered a new FQ-42 Vengeance to Creech Air Force Base in Nevada to support continued USAF test, evaluation, and experimentation. The aircraft has already participated in formation flights with crewed fighters, including the F-35 Lightning II and the F-15E Strike Eagle.

Secretary of the Air Force Troy Meink officially named the aircraft “Vengeance” on September 14, 2026. The aircraft was previously known internally as Dark Merlin. During the naming announcement, Meink emphasized the rapid pace of the acquisition program.

“Today, the first FQ-42 and FQ-44 increments are already rolling off the assembly line,” Meink stated. “They’ll be performing many of the same missions that we do with manned fighters today.”

Evolution of the Collaborative Combat Aircraft initiative

The USAF Collaborative Combat Aircraft program is designed to field affordable, semi-autonomous drones to augment crewed fighter squadrons. The target unit cost for the aircraft at full-rate production is approximately $20 million.

GA-ASI was selected by the USAF in April 2024 to build production-representative flight test articles for the program. The FQ-42 Vengeance completed its maiden flight in August 2025, and GA-ASI secured an initial production contract from the USAF in June 2026. The FQ-42 is one of two primary designs selected for the first increment of CCA production, alongside Anduril Industries’ FQ-44 Fury.

The scope of the CCA program has expanded significantly since its inception. Initial projections called for 150 aircraft, but on September 14, 2026, the USAF confirmed a revised goal to field at least 500 Collaborative Combat Aircraft by 2032.

Mike Shortsleeve, Vice President for Strategy Business Development at GA-ASI, addressed the increased production targets following the USAF announcement.

“The intent for them is to go up to as many as 500 aircraft by 2032,” Shortsleeve said. “We’re ready to do that production.”

GA-ASI has operated as a sole manufacturer of its Uncrewed Aircraft Systems (UAS) line since its founding in 1992. Over 30 years, the company’s Predator line has logged more than 9 million flight hours across platforms including the MQ-1C Gray Eagle, MQ-9A Reaper, MQ-9B SkyGuardian/SeaGuardian, and the MQ-20 Avenger.

Beyond the domestic FQ-42 program, GA-ASI is engaged in discussions with international militaries regarding the Gambit Series. The Gambit Series is a family of modular CCAs derived from the FQ-42, the XQ-67A Off-Board Sensing Station, and the MQ-20 Avenger, optimized for electronic warfare, suppression and destruction of enemy air defenses, and stand-off precision strike missions.

AirPro News analysis

The partnership between GA-ASI and Spirit Defense illustrates the central challenge of the Collaborative Combat Aircraft program: industrial capacity. Designing a capable uncrewed fighter is only half the mandate; the other half is manufacturing it at a scale and price point that traditional defense primes have struggled to achieve with crewed aircraft. By bringing a Boeing subsidiary into the fold for fuselage production, GA-ASI is signaling to the Department of Defense that it can meet the aggressive 2032 target of 500 aircraft without requiring massive, unilateral capital expenditure.

This distributed manufacturing approach also directly addresses the Pentagon’s ongoing concerns regarding supply chain fragility. Relying on a single facility in San Diego for a critical next-generation platform presents a strategic vulnerability. Distributing the airframe build to Wichita builds redundancy into the program while leveraging existing aerospace manufacturing infrastructure, a model that will likely become standard as the USAF pushes for higher volumes of attritable or semi-attritable autonomous systems.

Photo Credit: General Atomics

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US Air Force Awards Natilus $3.5M for KONA BWB Freighter

The U.S. Air Force awarded Natilus $3.5M to adapt its KONA blended-wing-body freighter for contested logistics in the Indo-Pacific.

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US Air Force Awards Natilus $3.5M for KONA BWB Freighter

The U.S. Department of the Air Force awarded San Diego-based aerospace manufacturer Natilus a $3.5 million contract on October 21, 2026, to accelerate the development of its KONA blended-wing-body regional freighter for military applications.

The Research, Development, Test, and Evaluation (RDT&E) funding, directed through the Assistant Secretary of the Air Force for Energy, Installations, and Environment and the Operational Energy – Innovation office, aims to adapt the commercial Cargo aircraft for contested logistics. The investment targets operations in fuel-constrained theaters such as the Indo-Pacific.

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Bridging the sub-tactical lift gap

Military planners are evaluating the KONA to fill a specific operational gap in the Indo-Pacific theater, where long distances and constrained fuel supplies complicate supply chains. The aircraft is positioned to provide sub-tactical lift, operating in a capacity tier between light utility aircraft like the Cessna C-208 and larger tactical airlifters such as the Lockheed Martin C-130 Hercules.

In a press release announcing the contract, Natilus chief executive officer Aleksey Matyushev stated that the KONA platform will allow the military to gather real-world data on payload, utilization, and reliability as its broader airlift requirements mature. The modular architecture of the optionally piloted aircraft allows for multiple military applications beyond cargo transport, including communications relay, specialized payload delivery, and intelligence, surveillance, and reconnaissance missions.

Blended-wing-body efficiency and specifications

The core of the Natilus design is its blended-wing-body (BWB) architecture, which merges the wings and fuselage to generate additional lift and reduce aerodynamic drag. According to the manufacturer, this design yields a 30 percent reduction in fuel consumption and a 50 percent reduction in operational costs compared to conventional tube-and-wing aircraft of similar size. The KONA is designed to carry a 3.8-ton payload over a range of 800 nautical miles, offering a 40 percent increase in volumetric capacity over traditional counterparts.

Speaking to Air & Space Forces Magazine, Natilus chief operating officer Nolan Giblin highlighted the operational mathematics of the design.

“When you couple the aerodynamic efficiency of about 30 percent reduction in fuel with the added volumetric capacity, it really boils down to moving more for less,” Giblin told the publication.

The fuel efficiency metrics are particularly relevant to the Air Force’s Agile Combat Employment doctrine, which requires distributing forces across remote or austere locations that lack established fuel infrastructure. The KONA is also designed for short-field operations and compatibility with existing cargo handling equipment.

Natilus background and commercial timeline

Founded in 2016, Natilus has focused primarily on the commercial air cargo market, developing a family of BWB freighters. The company reports having secured more than 570 aircraft pre-orders valued at approximately $24 billion. The engineering team draws personnel from established aerospace manufacturers including Boeing, General Atomics, Northrop Grumman, and Scaled Composites.

While the Air Force funding accelerates the military evaluation of the KONA, the aircraft remains fundamentally a dual-use platform. Matyushev noted that the accelerated operational timeline made possible by the Air Force investment will prove the aircraft’s flexibility and efficiency to the Joint Force, even as the company continues to target the global commercial sector.

The development timeline has experienced adjustments. Aviation International News reported that the target date for the first flight of the full-scale KONA prototype has shifted to late 2027 or early 2028, a delay from an initial target of 2026. The company is targeting commercial service entry by the end of the decade.

The Natilus contract follows broader Air Force investments in BWB technology. In 2023, the service launched a demonstrator program with JetZero to develop a larger BWB aircraft, designated the Z4, which is expected to begin flight testing in 2027.

AirPro News analysis

The $3.5 million contract awarded to Natilus is a modest sum in the context of defense procurement, but it signals a continued strategic pivot by the U.S. Air Force toward blended-wing-body architectures. Following the larger JetZero demonstrator contract in 2023, funding the KONA indicates that military planners are exploring aerodynamic efficiencies across multiple weight classes, rather than limiting the technology to strategic airlifters or aerial refueling tankers.

The explicit focus on sub-tactical lift highlights a recognized logistical vulnerability in the Indo-Pacific. Distributing supplies across vast island chains under the Agile Combat Employment doctrine requires platforms that are more capable than light utility turboprops but less resource-intensive than a C-130 Hercules. If the KONA can deliver its promised 30 percent fuel reduction and operate from short, austere runways, it could provide a highly efficient node in a dispersed logistics network. The optionally piloted design also aligns with the military’s broader push toward autonomous and uncrewed systems to reduce risk to personnel in contested environments.

Photo Credit: Natilus

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Lockheed Martin Signs 10-Year F-35 Framework for 850 Aircraft

A 10-year F-35 framework covers 850+ aircraft at 156/year, with Lockheed Martin committing $7B in self-funding pending Congressional approval.

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Lockheed Martin Signs 10-Year F-35 Framework for 850 Aircraft

Lockheed Martin Corporation and the U.S. Department of War have unveiled a 10-year framework agreement covering the production and sustainment of at least 850 F-35 Lightning II aircraft. Announced on October 22, 2026, the arrangement aims to replace the traditional annual contracting cycle with a long-term procurement model designed to stabilize the defense industrial base and generate volume-based cost savings.

In a press release issued by the manufacturer, Lockheed Martin detailed that the framework spans production Lots 21 through 30 and maintains a continued production rate of 156 aircraft per year. The agreement also mandates a minimum $7 billion private investment from Lockheed Martin to support the program, according to reporting by Breaking Defense.

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Shifting procurement strategies

The framework agreement marks a departure from the year-by-year purchasing model that has characterized the F-35 program since its inception. By establishing a decade-long baseline, the U.S. government intends to allow the manufacturer and its supply chain to plan capital investments and bulk material purchases with greater certainty. The strategy is intended to reduce logistics bottlenecks and improve mission-capable rates across the global fleet.

The announcement coincides with Lockheed Martin reporting its third-quarter 2026 financial results. During the earnings period, the company noted it remained in active negotiations with the U.S. government on production contracts for F-35 Lots 20 and higher, with the explicit goal of transitioning to a stabilized procurement model.

Michael P. Duffey, Under Secretary of War for Acquisition and Sustainment, highlighted the strategic intent behind the long-term commitment.

We have fundamentally changed how we stabilize the American defense industrial base to produce at speed and scale. This agreement with Lockheed Martin proves it. By aligning financial incentives with actual performance, we are ensuring our warfighters are equipped with the lethal capabilities they need to fight and win.

Lockheed Martin Chairman, President and CEO Jim Taiclet stated that the extended horizon enables the company to address supply chain vulnerabilities.

This multiyear framework strengthens the way we can plan and invest in the F-35 enterprise. With the greater certainty that comes from the U.S. government’s transformative approach to F-35 production and sustainment, we can make the upfront investments needed to expand capacity, improve efficiency, and build a more resilient supply chain. That’s good for the taxpayer, good for our suppliers and, most importantly, good for the United States and its allies.

Program history and operational footprint

The F-35 Lightning II is a fifth-generation stealth multirole fighter developed to replace legacy tactical aircraft, including the F-16 and F/A-18. The program originated from the Joint Strike Fighter (JSF) competition, which saw the X-35 prototype win the development contract in 2001. The aircraft completed its first flight on December 15, 2006.

Lockheed Martin produces the aircraft in three primary variants to meet different operational requirements. The F-35A is designed for conventional takeoff and landing, the F-35B features short takeoff and vertical landing capabilities, and the F-35C is engineered for carrier-based operations. The U.S. Air Force declared Initial Operational Capability (IOC) for the F-35A in August 2016.

The F-35 is currently the most-produced fifth-generation fighter globally. It is operated by the U.S. military and approximately 20 allied nations. The new framework agreement follows a major programmatic milestone achieved on March 12, 2024, when the U.S. Department of Defense officially approved Milestone C and Full Rate Production. That decision formally recognized that the manufacturer had demonstrated control of the manufacturing process alongside acceptable performance and reliability metrics.

Congressional hurdles and next steps

While the framework outlines the structure for the next decade of F-35 production, it is not yet a finalized, funded order. The total contract value and the per-aircraft price were not disclosed in the October 22 announcements.

The execution of the agreement remains strictly contingent upon the U.S. Congress granting multiyear procurement authority and passing the associated appropriations. In the coming months, the F-35 Joint Program Office (JPO) and Lockheed Martin will work to finalize specific contract terms, pricing structures, and delivery schedules ahead of a formal contract award.

AirPro News analysis

The transition from annual procurement to a decade-long framework represents a maturation phase for the F-35 program following its March 2024 Full Rate Production milestone. By securing a 10-year horizon, Lockheed Martin gains the leverage needed to negotiate bulk material purchases and secure lower-tier suppliers, which have historically been choke points for aircraft availability and sustainment.

We view the $7 billion self-funding requirement as a critical compromise. The U.S. Department of War is offering unprecedented revenue predictability, but in return, it is forcing the prime contractor to shoulder the upfront capital expenditure required to fix lingering sustainment bottlenecks. If successful, this framework could serve as a blueprint for future major defense acquisition programs, provided the U.S. Congress is willing to surrender the granular oversight inherent in annual budget approvals.

Photo Credit: Lockheed Martin

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