Part 3 - HÜRJET-X on Land: The Case for a Single-Platform, Dual-Role Fighter
1. One Aircraft, Two Missions
The previous posts in this thread examined HÜRJET-X as a naval fighter for MUGEM. But a question that kept coming up in the background was whether the same aircraft, or something very close to it, could also serve as a land-based light combat aircraft for the Turkiye Air Force.
The instinct behind this question is industrial rather than tactical. If HÜRJET-X is developed exclusively as a naval platform, the production run is small, probably around 20 aircraft for the Navy, and the unit cost stays high. A separate land-based LCA variant would require its own development cycle, its own certification, its own integration programme, consuming TUSAŞ engineering bandwidth that is already stretched across KAAN, ANKA-3, and multiple other concurrent programmes. The more rational approach is to ask whether the naval version can do double duty, or whether a minimal set of modular changes can produce a land variant from the same production line without a separate development programme.
This is not a novel idea. The Royal Australian Air Force operated the F/A-18 Hornet, a carrier-designed fighter, from land bases for over three decades. Australia never intended to put the aircraft on a ship. It bought a naval fighter because the F/A-18 offered twin-engine safety, a robust airframe, and excellent sensors at a competitive price. The reinforced landing gear designed for carrier landings turned out to be an asset on Australian runways that were not always in perfect condition. The Australians accepted the modest weight penalty of navalization as the cost of getting a proven, tough airframe. The precedent suggests that a navalized fighter operating from land is not a compromise but a legitimate procurement strategy, provided the weight penalties are understood and accepted.
2. Cockpit and Wing: Where the Variants Diverge
If HÜRJET-X is to serve both naval and air force customers, the question is where the two versions differ and where they stay identical.
The cockpit is the first divergence point. The naval version uses a tandem cockpit: the pilot flies, the weapon systems officer manages MUM-T and sensor coordination. For carrier operations, this crew division makes sense because the workload of carrier approach, landing, and simultaneous drone management is genuinely high. But many air forces, including Turkiye's, would want a single-seat variant for the combat role. Fewer crew means more aircraft per available pilot pool, and the single-seat fighter has historically been the default preference for air superiority and multirole missions.
The concern that a single-seat version loses MUM-T capability is valid but overstated. KAAN is being developed as a single-seat fighter with full MUM-T authority over unmanned wingmen. The autonomous management software and the IVDL datalink architecture being built for KAAN are designed from the ground up for single-pilot operation. There is no reason this same software cannot be adapted for HÜRJET-X. The tandem cockpit makes MUM-T easier in the near term, while autonomous systems are still maturing. The single-seat version relies more heavily on that autonomy. But both paths converge as the software improves, and the single-seat configuration will eventually be the standard for MUM-T across all Turkiye's combat platforms.
A production approach that offers both A and B variants, single-seat and tandem, from the same line is standard practice. The forward fuselage section differs between the two, but the mid-fuselage, aft fuselage, wings, engines, landing gear, and avionics architecture remain common. The tandem version serves the Navy and potentially export customers who want a trainer-fighter hybrid. The single-seat version serves the Air Force and export customers who want a pure combat platform.
The wing is the second divergence point. The naval version requires folding wings for carrier hangar compatibility. The land-based version does not. A fixed, single-piece wing is structurally simpler, lighter, and stronger than a folding wing because it eliminates the fold joint, the hydraulic actuators, the locking mechanisms, and the associated wiring and inspection requirements. The weight saving from removing the fold mechanism is estimated at 130 to 200 kilograms. This is not a dramatic figure in isolation, but combined with other navalization items that the land version does not need, the total weight reduction adds up.
Removing the arresting hook and its structural framework saves an estimated 50 to 70 kilograms. Reducing the corrosion protection package from full maritime specification to standard land-based treatment saves another up to 50 kilograms. The reinforced landing gear, however, should be retained even for the land variant, for reasons discussed in the next section.
Total estimated weight saving for the land variant: roughly 300 to 400 kilograms compared to the full naval configuration. This weight can be redistributed as additional internal fuel, extending range by an estimated 15 to 20 percent, or as additional payload capacity, or simply accepted as improved performance through better thrust-to-weight and climb rate. The specific allocation would depend on the customer's operational priorities.
3. Highways, Tunnels, and the Dispersed Base Doctrine
The Swedish Air Force built its entire Cold War operating concept around a simple premise: if your air bases are known, they will be destroyed in the first hours of a conflict. The solution was to not depend on air bases. The Bas 90 system dispersed fighter operations across hundreds of prepared highway strips, forest clearings, and civilian infrastructure throughout Sweden. Gripen was designed specifically for this doctrine: short takeoff and landing from 800-metre road segments, rapid turnaround by small ground crews, and concealment in forest shelters or highway tunnel entrances between sorties. The aircraft was the tool, but the doctrine was the weapon.
HÜRJET-X, somewhat unexpectedly, aligns well with this operational philosophy, and for reasons that trace directly back to its naval origins. The reinforced landing gear designed for carrier deck impacts at 3-plus metres per second sink rate is overengineered for a normal concrete runway, but it is well matched to the rougher surfaces of highway strips, patched runways, or improvised landing zones. The short takeoff performance developed for ski-jump departure translates directly to short runway segments. The low wing loading that helps with carrier approach also reduces the ground roll distance. Twin engines provide the redundancy that matters most when operating far from maintenance facilities, where a single engine failure would otherwise mean losing both the aircraft and the pilot.
This is not an abstract doctrinal exercise for Turkiye. The country's geography includes long coastlines, mountainous terrain, and a strategic depth that benefits from distributing air assets rather than concentrating them at a handful of large bases. A fleet of HÜRJET-X fighters operating from dispersed highway strips and concealed in road tunnels along the southern and western coasts presents a fundamentally different targeting problem to an adversary than the same number of aircraft parked at two or three known air bases.
KIZILELMA fits naturally into this dispersed architecture. As an unmanned platform with minimal ground support requirements, it can operate from even more austere locations than HÜRJET-X. A dispersed cell might consist of two HÜRJET-X fighters and two KIZILELMA, sheltered in a highway tunnel or forest, serviced by a small mobile maintenance team, and launching from the adjacent road segment. The pilot in the HÜRJET-X commands the KIZILELMA formation through IVDL, the same MUM-T architecture used aboard MUGEM but applied to land-based operations. The tactical effect is a distributed, hard-to-target combat formation that can generate sorties from locations the adversary has not planned to strike.
A daily cycle for such a cell might look like this: aircraft are rolled out of tunnel concealment at dawn, armed and fueled by a mobile team, launched in pairs with KIZILELMA wingmen for a patrol or strike sortie, recovered on the same road segment or an alternate strip, and rolled back into concealment. The entire operation requires no fixed infrastructure beyond the road surface itself, pre-positioned fuel and munitions caches, and a mobile command vehicle with IVDL connectivity. This is a low-cost, high-resilience operating model that plays directly to the strengths of a light, twin-engine, rugged fighter with indigenous engines and an integrated unmanned wingman capability.
4. Production Economics: One Line, Two Customers
The industrial argument for the dual-role approach rests on production volume and its effect on unit cost. A realistic domestic order book might look something like this: approximately 20 HÜRJET-X for the Navy in the tandem-seat, folding-wing, full navalization configuration. These aircraft double as the training and transition platform for future naval aviators as MUGEM's air wing matures toward a KAAN-Naval era. Approximately 60 HÜRJET-X for the Air Force in the single-seat, fixed-wing, reduced-navalization configuration, filling a portion of the light combat and dispersed operations requirement. This is a conservative estimate; the Air Force may take fewer if institutional preference for heavier platforms persists, or more if the dispersed basing doctrine gains traction.
Total domestic production: roughly 80 aircraft from a single production line. The standard HÜRJET trainer variant, which serves a separate requirement entirely, would continue in parallel on its own production stream.
The unit cost effect of 80 versus 20 aircraft is significant. Fixed development costs are amortised across four times the production run. Engine procurement volume, assuming the TF10000 is the common powerplant, roughly triples (160 engines for 80 twin-engine aircraft versus 40 engines for 20). Supplier qualification costs, tooling amortisation, and learning curve effects all benefit from the higher volume. The exact unit cost reduction is difficult to project without detailed production data, but historical precedent in comparable programmes suggests that quadrupling the production run can reduce unit flyaway cost by 20 to 30 percent.
The alternative, developing a separate land-based LCA from scratch or even as a distinct HÜRJET derivative with its own airframe changes, would split the engineering effort, require separate type certification, and produce two lower-volume production runs instead of one higher-volume run. In an environment where TUSAŞ is simultaneously managing KAAN, ANKA-3, standard HÜRJET, and multiple other programmes, the engineering bandwidth for a second parallel fighter derivative simply may not exist. The single-platform, dual-role approach is not just economically preferable, it may be the only industrially feasible path.
5. Export: A Rugged Fighter for Constrained Air Forces
Beyond the domestic market, the land-based HÜRJET-X variant addresses a segment of the international fighter market that is currently underserved.
Many small and medium air forces across Africa, South and Southeast Asia, and Latin America face a common set of constraints. Their budgets cannot support 70 to 90 million dollar fighters. Their infrastructure cannot sustain high-maintenance platforms designed for pristine Western air bases. Their pilot pools are small, making twin-engine survivability more than a preference; losing a pilot to a single engine failure is an operational crisis when you have forty pilots total. And increasingly, their political relationships with traditional Western suppliers are complicated by export restrictions, end-use conditions, or simply by being deprioritised in the delivery queue behind wealthier customers.
HÜRJET-X in its land configuration offers something this market does not currently have: a twin-engine, indigenous-powered, low-maintenance fighter in the 40 to 50 million dollar class that comes without the political conditions attached to American or European platforms. The reinforced landing gear handles runways that would challenge lighter aircraft. The TF10000 engine is supplied by Turkiye without third-party export licence requirements. The common engine family with KIZILELMA means that a customer already operating Turkish unmanned platforms can share maintenance knowledge and potentially spare parts across its manned and unmanned fleet.
Turkiye's defence export relationships, built substantially through Bayraktar drone sales over the past decade, have established trust and familiarity with Turkish defence products across a wide range of countries. Several of these countries are actively looking for affordable combat aircraft to replace ageing fleets of F-5s, MiG-21 derivatives, or early-generation Chinese types. HÜRJET-X does not need to compete with the F-35 or Rafale in this market. It needs to offer a credible, affordable, and politically accessible alternative to the JF-17, FA-50, and Tejas, with the twin-engine safety and indigenous supply chain that none of those competitors currently provide.
The naval variant has a narrower but real export potential. A small number of countries operate or plan to operate light carriers or large amphibious ships with flight decks. For these navies, a carrier-capable fighter in the 12-tonne class with indigenous engines is an option that does not exist elsewhere in the market today.
6. Trade-offs and the Strategic Question
Every programme competes for the same finite pool of money, engineers, and institutional attention. The honest closing question for this discussion is not whether HÜRJET-X as a dual-role platform is technically feasible. The preceding sections suggest that it is, within the constraints and trade-offs described. The question is whether it is strategically worth doing.
The case in favour rests on filling two gaps, naval fighter and dispersed-operations LCA, with a single development programme, at a unit cost driven down by combined production volume, using an indigenous engine that eliminates foreign supply chain dependency. The Bas 90 style operating concept adds a doctrinal dimension that arguably increases the resilience of Turkiye's overall air defence posture in ways that additional heavy fighters cannot.
The case against is equally real. Every engineering hour and every budget lira spent on HÜRJET-X is an hour and a lira not spent on KAAN, KIZILELMA, ANKA-3, or the TF35000 engine. The Air Force's near-term combat capability depends on F-16 modernisation and the Eurofighter acquisition, both of which deliver proven capability faster and with less developmental risk than a new platform. KAAN is the strategic priority for air superiority. KIZILELMA and ANKA-3 are the priority for unmanned mass. Standard HÜRJET is the priority for pilot training. Where does HÜRJET-X fit in this queue without displacing something more urgent?
The answer may depend on timing. If HÜRJET-X can be developed with minimal disruption to existing programmes, by reusing HÜRJET's engineering base, KAAN's technology transfer, and TF10000 as a delivered engine rather than a new development, the incremental cost and effort may be justified by the dual capability it delivers. If it turns into a resource-intensive programme that competes with KAAN for engineering talent and budget, the trade-off becomes harder to defend.
This is not a question this post can answer. It is a question for the planners who see the full resource picture, the full threat assessment, and the full industrial capacity. What this discussion has tried to establish is that the option exists, that the technical path is walkable, and that the potential payoff, a sovereign, dual-role, exportable fighter platform built on an existing industrial base, is substantial enough to warrant serious evaluation rather than casual dismissal.
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