F-18L: the forgotten land-based Hornet

The Hornet stands as one of the most capable multirole combat aircraft ever produced. In Australian service, it operates exclusively in a land-based role, mirrored by nearly all its international users. Yet its origins are unmistakably naval; the aircraft was designed from the outset for carrier operations.
In the late 1970s, however, Northrop proposed a markedly different evolution of the design: a lighter, faster, and more agile variant tailored specifically for Air Force requirements. Designated the F-18L, this concept represented a focused attempt to strip away the compromises inherent in carrier capability and optimise the platform purely for land-based performance.
Despite its technical promise, the F-18L never progressed beyond the proposal stage. It remains a largely overlooked footnote in aviation history—but with the benefit of hindsight, it is difficult to avoid the conclusion that it may have been a remarkably sound idea.

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HISTORY OF COBRA AND TEAMING DEAL
In 1974, Northrop competed in the Lightweight Fighter program, ultimately losing out to the F-16 concept. Its own submission, the YF-17 Cobra, was inspired by the evolution of the F-5 Tiger 2. In practice, it was a good design; affordable, easy to maintain, and with great potential for one-circle fighting.
With a solid core design, the Cobra would continue to evolve.
As most are aware, in 1975, Northrop redirected attention towards a low-cost, carrier-capable fighter, using the same hi-lo complementary approach as the Air Force’s Eagle and Viper pairing. The Cobra would be the basis.
[5] With far more experience with carrier aircraft under their belt, McDonnell Douglas would sign a teaming deal with Northrop in 1975; together, they would collaborate on the new project, the Hornet.
Critically, the contract would split responsibilities between the two companies. Northrop would focus on specific parts of the fuselage, such as the vertical fins. One crucial detail that would later become contentious was that McDonnell Douglas would be the prime contractor for any Navy-specific airframes. Northrop interpreted the agreement as allowing it to market a land-based derivative.
Even without a contract for the original Cobra, Northrop knew that the Hornet had great capabilities as a land-based fighter.

LAND BASED HORNET
In 1975, a proposal was put forward for a land-based Hornet—the F-18L. In essence, it would be similar to the A model but stripped back as much as possible, dropping all unnecessary Navy-spec components while keeping the same internal systems and airframe.
As part of the teaming deal, it would be a Northrop project. On paper, there were many potential customers, especially close allies such as Australia, Canada, and West Germany.
For Northrop, the concept was more realistic and attractive than the Cobra; it offered more in a similarly sized package, with no significant drawbacks. What’s more, a focus on multirole was an increasingly necessary selling point, both domestically and in the export market.
At home, most bases were already covered; the F-16 filled the low-cost, lightweight fighter class so well that it was fruitless to ever re-enter competition with it. The F-15, as a frontline fighter, simply couldn’t be matched. Outside its obvious advantage as a Navy platform, the Hornet could find a niche as a lower-cost, easily maintainable multirole platform—something akin to a modernised F-5. But convincing a service branch to buy it would be hard.
In the export market, the story was similar, albeit with better prospects. Since the late 60s, Northrop’s most notable success has been the F-5. From Europe to Asia to the Middle East, it had successfully filled a niche market that higher-cost platforms simply couldn’t enter. This market had otherwise been filled by the Soviets, who, thanks to state-owned manufacturing, could undercut the US on sales prices, or by France, which offered aircraft both outside the western sphere and without the typical strings attached.
The F-5 was therefore important in filling a particular low-cost, high-performance gap, yet France and the Soviets would not stop competing for this market. Thus, introducing a new American platform to compete in this market was a smart geopolitical choice.
The F-5 had been sold as a lightweight fighter, but in practice, foreign militaries used it for just about everything.
In like manner, while the Cobra had been envisioned as the spiritual successor to the Freedom Fighter and Tiger 2, from a utilitarian perspective, the multirole Hornet was far closer to what F-5 customers actually wanted.
The primary competitor remained the Viper. Yet in the Hornet, Northrop now held a new advantage; unlike the Viper, which was initially optimised for air combat, the Hornet would be designed from inception as a multirole fighter and retain similar air-to-air performance to the F-16A.

SPECS AND DESIGN
With a solid idea in hand, a marketing push ensued, and Northrop brought together a dedicated team for the F-18L around 1977. Drawings and detail sheets of the aircraft indicated it was a heavy lifter, capable of carrying an array of air-to-air and air-to-ground weapons. Marketing brochures and aviation magazine articles claimed that the Northrop design would outperform the Navy model in most respects, with one explicitly citing a distinct advantage in turn rate, payload, range, acceleration, and maintenance and operating costs. Another notes an external load capacity of 20,000 lbs across 11 hardpoints.
Several brochures also allege that a twin-seat model would be for sale, as they put it, without adding any length to the fuselage. Presumably, this would be a trainer or a stripped-back equivalent of the F/A-18B, although a Northrop marketing pamphlet suggests that a two-crew, mission-ready configuration would be produced.
The aircraft would boast strong parts commonality with the Navy model, with one brochure claiming it at 95%. It would use the same AN/APG-65 radar, the same engines, the same internal systems, and an almost identical airframe, save for several small but crucial alterations.
Outwardly, the leading edge would look slightly different. The carrier-spec hook would be replaced with a lightweight emergency hook; the front gear would be stripped of carrier launch components and replaced with a lightweight oleo strut; and the heavier folding wing would be replaced with a fixed wing, with a further outboard pylon added to each.
One LuftwaffeLuftwaffe: Derived from the German words "Luft" (air) and "Waffe" (weapon), the term literally means "air weapon" and refers to the aerial warfare bra... More outlet in 1978 reported a weight of 27400lb, compared with the F-18A’s 33700lb, while some structural changes were supposedly added. Other images show a slightly different leading-edge extension and wing, smoother and somewhat like that on the Cobra.
A large-scale mock-up was built alongside smaller models to demonstrate payload capacity. The large mock-up – supposedly presented in person to prospective customers – was shown armed with sidewinders, sparrows on the wingtips, external inboard tanks, and what appear to be sixteen MK-20s, mounted six to a pylon on BRU-41 racks. Presumably, this could also be done on the inboard pylons holding the tanks.
Other smaller mock-ups and illustrations showed additional configurations, some with various pods, guided and unguided bombs, and Mavericks. One small-scale model showed four Mark 82s on an inline pylon, with pods on the port and starboard fuselage mounting points. On each wing, moving outward, there was a fuel tank, a GBU-10, twin Mark 82s on a rack, and clean wingtips.
While these loadouts were probably maximum-capacity showcases, what is notable is that Northrop evidently wanted to outdo the carrier version by featuring Sparrow integration on the wingtip pylon, which would presumably be expanded to the AMRAAMAMRAAM (Advanced Medium-Range Air-to-Air Missile) – A radar-guided, beyond-visual-range air-to-air missile developed by Raytheon for the United States... More later. What’s more, not only would the few thousand pounds of weight saving allow for more stores, but the restructured wing would too.
While details on air-to-air loadouts are scarce, we can presume it would have performed on a similar footing to the F-16, likely with a slower top speed due to its shaping, but with superior high-AOA performance and nose authority at low speeds, making it a great one-circle fighter. The Hornet, in its modern form, still does this better than the Viper at the right speeds.
What’s more, it has since been claimed – though without certainty – that the F-18L was to be rated for 9G, which seems plausible given the altered wing and reduced weight.

MARKETING TO FOREIGN NATIONS
Everything looked good on paper. There was interest in the export market. In fact, the earliest prospective customer, Iran, had been keen on the design since it was first proposed as a hypothetical in 1975.
In September 1976, following Tom Jones’s visit to Tehran, Iran formally requested the purchase of 250 of the new L models, including an $8 million investment to accelerate R&D, with the total acquisition cost around $4 billion.
The US Navy supported the endeavour, as it would drive down the Hornet’s price as the market expanded. However, government support was limited.
A National Security Affairs memorandum to President Ford, dated October 1976, stated that no American service branch had shown interest, that development would cost $300 million, and that the DOD would review it only after an Iran Master Plan for the project had been drawn up with sufficient data. To help pay the $4 billion acquisition price, the Iranians had supposedly offered an oil-for-arms deal, which the US government doubted would come to fruition.
Finally, in 1977, the Carter administration’s restrictions came into effect. Iran, in particular, was an odd case; it was a high-priority ally in the region, but the Shah’s ambition to field not only Tomcats but also a huge fleet of Vipers and Hornets would have given it such dominance, even with a downrated fleet, that it was deemed a possible national security risk.
While the DOD suggested the deal might be possible in the future, it was off the table thereafter.

LAWSUIT
Contentions soon arose between Northrop and McDonnell Douglas, with Northrop filing a lawsuit in 1979, alleging breaches of their 1975 teaming agreement and contract, as well as antitrust violations. It was alleged that McDonnell Douglas had interfered with foreign sales and that proprietary technology had been misappropriated in the F/A-18A to compete with Northrop’s own design. It was also claimed that McDonnell Douglas deliberately delayed the joint Hornet project to push the F-15 to market first.
McDonnell Douglas would counter the claims with a countersuit, alleging that Northrop breached the contract and used Hornet components in the F-20 Tigershark.
While it remains unclear exactly what was happening behind the scenes, the lawsuit would trigger a major restructuring of the program. The litigation would take almost six years, with the case dragged out, and a final settlement occurring on April 8th, 1985.
The outcome was significant. After McDonnell Douglas paid US$50 million to Northrop, the agreement was officially restructured, allowing McDonnell Douglas to sell the F/A-18 whenever it wanted, and, as the undisputed prime contractor for the platform, not only in the Alpha configuration but in all variants.

Failure to Sell
During this period, Hornet production continued, yet the fate of the F-18L was effectively sealed, with Canada’s purchase serving as the exemplary case. In a rare instance, both Northrop and McDonnell Douglas had presented competing Hornets. In 1978, Northrop had demonstrated the Cobra to Canada, painted up as a so-called CF-18L, but hesitation persisted. Ultimately, the F-18L was rejected in 1980, with Canada opting for a slightly modified derivative of the carrier model.
As time went on, even the feasibility of selling a land-based Hornet had become infeasible. In just a few years, the landscape had changed dramatically. In the late 70s, Northrop had a distinct advantage in the export market thanks to the Carter restrictions. Now, these restrictions had been overturned, and the F-16 was selling both as a dedicated fighter platform and as a modern equivalent to the F-5.

CONCLUSION
It remains a mystery how well the F-18L would have performed. The marketing material’s allusions to a twin-seat model – possibly inspired by the Tomcat or the IAF’s use of the F-15B – suggest it was an ambitious multirole platform. The RAAF might have bought it if it had been built, and we can assume other nations in Europe may have as well.
Even by inference, it would likely have been impressive; the Hornet’s high AOA performance was unheard of for its time, and on a lighter platform with better thrust-to-weight, this could have made it an even closer rival to the Viper, all in a multirole platform.
While Northrop would redirect its attention towards the F-20 as a lightweight multirole platform, in the final analysis, its vision for a land-based Hornet was not misplaced. Today, most operators use it primarily as a land-based platform.