As history shows us, many times in war you do not always get to chose from the most optimal of solutions.

Russia’s Su-35 fighter certainly has western defense outlets buzzing--and for good reason.

Moscow, despite heavy sanctions and an economy that has certainly seen better days, keeps pumping out new combat systems one after another--items like new tanks, submarines, nuclear weapons platforms and more.

While many were indeed designed and planned for ahead of the imposition of sanctions, Russia is clearly making a big effort to modernize its armed forces, especially its air force, and moving past older Soviet platforms. The Su-35 is a good example of such efforts.

So how would the Su-35 do against America’s best planes? How would it fare against an American air force that is clearly the best in the world.  How would, for example, the Su-35 do in a combat situation against Lockheed Martin’s F-35 Joint Strike Fighter? How would Russia’s new plane do against older aircraft like the F-15 or say F-16?

Such scenarios matter--and not just in the context of a possible NATO/Russia or Middle East situation, but now that Russia is set to deliver the Su-35 to China, such comparisons matter even more. There are many places where all of these lethal aircraft will overlap, making such comparisons even more timely.

Compiled below are three articles, written several years ago by TNI’s former Defense Editor, Dave Majumdar, that looks at these questions in depth, combined in one posting for your reading pleasure. With that said, let the debate begin.

This first appeared in September 2016.

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While the Lockheed Martin F-35 Joint Strike Fighter is slated to become the mainstay of the Pentagon’s tactical fighter fleet, not everyone nation on Earth can afford to fly an expensive fifth-generation fighter.

Even Russia and China are not likely to attempt to develop an all fifth-generation fighter fleet—instead, for the foreseeable future, the derivatives of the Sukhoi Su-27 Flanker air superiority fighter will make up the bulk of their tactical air arsenals. The most potent Flanker derivative is the Su-35, which is a much-improved version with vastly improved avionics, engines and airframe. In the years ahead, this latest Flanker-E is likely to proliferate around the world.

To counter the proliferation of Flanker variants, the U.S. Air Force, Marines and to a far lesser extent, the U.S. Navy will have to rely on versions of the F-35 even though it was never intended to be an air superiority fighter. It was and continues to be a strike aircraft with a robust air-to-air self defense capability even though the Pentagon has pushed it to a be a jack-of-all-trades.

How would a group of four F-35s fare if it were confronted by a formation of four Su-35s? The most likely answer is that they would change course and call in the F-22 Raptors and F-15Cs, which are tasked with gaining and maintaining air superiority. Meanwhile, the F-35s would go on their merry way to their assigned targets.  

However, as history shows us, many times in war you do not always get to chose from the most optimal of solutions. If the F-35s were left to their own devices, they would probably be alright even against the Su-35––if they played their cards right. The F-35s pilots would have to use their stealth, onboard and offboard sensors and smart tactics that play to the F-35s strengths and avoid its weakness. That means using the jet’s stealth and sensors to engage enemy fighters from beyond visual range and avoiding a visual range turning fight where the F-35 is vulnerable.

Unlike a Raptor, which was designed from the outset as an air-to-air killer par excellence—the F-35 was not. The Raptor combines a very stealthy airframe with a high altitude ceiling and supersonic cruise speeds in excess of Mach 1.8. Compared to that, the F-35 can  just barely touch Mach 1.6 in full afterburner. Further, the F-22 possesses excellent maneuverability for close-in visual-range dogfights––it crushes the competition in terms of turn rate, radius, angle-of-attack and energy addition at all altitudes.

Whereas a four-ship flight of Raptors cruising at high supersonic speeds in the rarified atmosphere above 50,000 feet can effectively choose when and where to fight, a flight of slower, lower-flying F-35s might find themselves forced to react to better-performing enemy planes if they are not careful.

Moreover, the F-35 does not have the speed or altitude to impart as much launch energy to the AIM-120 air-to-air missile as the Raptor can, which means the missiles will have less range when fired from a JSF. Nor can the F-35 carry as many air-to-air missiles—which is a problem given that digital radio frequency memory jammers can wreak havoc with the AMRAAM’s guidance system.

Close in, the JSF does not have the maneuverability of the Raptor––or even a F-16 or F/A-18. If forced into a dogfight, an American F-35 pilot’s superior skills and experience might be the only factor that might save him or her from being shot down. The fact is that an F-35 in stealthy configuration armed only with internal weapons cannot currently carry the AIM-9X high off-boresight missile. If the AIM-9X were one day integrated into the weapons bays, it would come at the cost of an AIM-120 rail—which is arguably a better weapon for an aircraft like the F-35. Basically, an F-35 pilot should avoid a close in fight at all costs.

It is highly unlikely that a U.S. Joint Force Air Component Commander (JFACC) would assign an air superiority mission to an F-35 unit if alternatives were available. But given the tiny fleet of Raptors and dwindling F-15C fleet, it is possible that the JFACC could be forced to use the F-35 as an air superiority asset. However, that being said, the real threat to American air power in most regions around the world is not enemy air power—but rather advanced enemy integrated air defense systems.

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The Boeing F-15C Eagle has been in service with the U.S. Air Force for nearly 40 years and will likely serve for decades to come. Over the years, the mighty F-15 has been upgraded to keep pace with evolving threats, but does the venerable Eagle still have what it takes to dominate the skies?

The answer is yes—absolutely. The Eagle may be old, but it’s still one of the best air superiority fighters flying. The only operational aircraft that is definitively superior to the F-15 in most respects is the Lockheed Martin F-22 Raptor—other machines have the edge in certain aspects, but the F-15C is still competitive overall despite what the business development departments at various rival contractors might say.

Perhaps the most advanced threat the F-15 is likely to encounter is the Russian-built Sukhoi Su-35 Flanker-E. While there are more advanced threats in development, those aircraft are likely to be too expensive to ever become commonplace. The Su-35 isn’t the most common potential threat out there, but there is a good chance it will proliferate. Indonesia has reportedly decided to purchase the Su-35, and we know that the Chinese have had discussions about a potential purchase.

The Su-35 is a genuinely dangerous war machine, and in many metrics, it matches or even exceeds the capabilities of the latest upgrades for the F-15. In terms of pure kinematic performance, the Su-35 is slightly slower than the F-15C in terms of max speed but it can out accelerate the Eagle with its powerful twin Saturn Izdeliye 117S engines, which put out 31,900lbs of thrust each. Further, when the jet is relatively lightly loaded, it can maintain supersonic speeds without the use of its afterburners.

While excellent acceleration at high altitude to supersonic speeds is a huge advantage, the F-15C is no slouch—and it wouldn’t be a decisive edge for the Russian jet. However, where the Su-35 does have an insurmountable edge is at low speeds. The Flanker-E has three-dimensional thrust vectoring and is unbelievably maneuverable at low speeds. However, given the advent of helmet mounted cuing systems and high off-boresight missiles like the AIM-9X and Russian R-73, more often than not, close in visual encounters tend to be “mutual kill” situations as many pilots can attest. A lot of it is going to come down to pilot skill and, frankly, luck.  

At longer ranges, the F-15C and the F-15E still have the advantage over the Su-35 with their active electronically scanned array radars. The Raytheon APG-63 (v) 3 and APG-82 (v)1 on the two Eagle variants are still considerably superior to the Su-35S’ Tikhomirov IRBIS-E phased array radar. The Su-35 does hold a fleeting advantage for now for passive sensors since it has a built-in infrared search and track system (IRST), but the F-15 fleet will receive a very capable IRST in the near future—nullifying the Flanker’s edge.

One area the Flanker-E probably holds the edge is with its electronic warfare suite. The Su-35S boasts a potent digital radio frequency memory jamming suite that can wreck havoc with the AIM-120 AMRAAM missile. While American missiles are likely to eventually make it through, it will take many more missiles to achieve a kill than planners were counting on. The Su-35, meanwhile, carries a huge arsenal of air-to-air missiles versus the F-15 fleet’s obsolete defensive electronics. The U.S. Air Force is keenly aware of the problem, which is why it places such emphasis of on the $7.6 billion Eagle Passive/Active Warning and Survivability System upgrade.