Key Points and Summary – A debate is underway on whether the expensive, hypersonic SR-72 Darkstar is still needed given the arrival of 6th-generation stealth fighters.
-The argument for the SR-72 centers on pure speed as a revolutionary tactical advantage.
SR-72 from Lockheed Martin. Image Credit: Lockheed Martin.
-A Mach 6 platform is likely more survivable than even the stealthiest fighter, as its velocity makes it nearly impossible for advanced enemy air defenses to establish a target track.
-A manned Darkstar would be a paradigm-changing asset, combining this survivability with human decision-making at the tip of the spear, creating an invaluable ISR and strike complement to other aircraft.
-Considering the modern battlefield, having both the SR-72 and F-47 makes a lot of collective sense.
SR-72 Darkstar and Boeing F-47: A Great Team?
Utilizing aerodynamic configurations, composite materials to withstand intense heat, and scramjet propulsion technology, could the secretly emerging, mysterious yet much-discussed SR-72 Darkstar achieve hypersonic speeds of Mach 6 with a human pilot?
The answer to this pertains to cutting-edge technological questions regarding the potential impact and relevance of the largely unknown SR-72 Darkstar.
Hypersonic weapons are certainly here, yet hypersonic drones for high-speed sensing and attack, and manned hypersonic flight advance this equation in a substantial way.
Manned hypersonic flight could be paradigm-changing and arrive as something that would unquestionably change concepts of operation. Does the arrival of manned 6th-gen stealth aircraft render the SR-72 Darkstar unnecessary?
Therefore, despite the anticipated merits of manned hypersonic flight, some weapons developers at the Pentagon might consider cancelling the SR-72 for cost reasons, with the idea of freeing up more money for emerging stealth drones and 6th-generation aircraft.
Cancel the SR-72?
Could the arrival of the ultra-stealthy F-47 and the soon-to-exist F/A-XX lead some Pentagon decision-makers to reevaluate the merits of producing the mysterious yet highly coveted hypersonic SR-72 Darkstar?
Shown is a graphical artist rendering of the Next Generation Air Dominance (NGAD) Platform. The rendering highlights the Air Force’s sixth generation fighter, the F-47. The NGAD Platform will bring lethal, next-generation technologies to ensure air superiority for the Joint Force in any conflict. (U.S. Air Force graphic)
Clearly, not producing the SR-72 Darkstar might save the Pentagon money it could spend elsewhere.
Yet, the tactical merits of introducing aerial surveillance, targeting, and attack at hypersonic speeds cannot be underestimated.
F-47 and SR-72: What a Combo for the Air Force
Fast-arriving 6th-gen aircraft such as the F-47 are expected to travel at speeds of at least Mach 2 or greater with new generations of stealth technology, capabilities which would be massively complemented by a drone or manned platform traveling at Mach 6.
Initially, one is likely to consider the simple, self-evident value of pure speed in war; a hypersonic platform could conduct attack missions and Intelligence Reconnaissance and Surveillance (ISR) operations at speeds seemingly impossible for enemy air defenses to “track” ot “target.”
The Pentagon is well aware of this phenomenon, due to its ongoing work on hypersonic weapons and possible defenses against them; a projectile traveling at hypersonic speeds can make it extremely difficult, if not impossible, for any ground-based radar to establish a continuous target “track” by simply traveling too quickly from one radar field of regard to another.
The speed of transit from one radar aperture to another with hypersonic projectiles greatly complicates targeting a moving jet. This holds true for hypersonic drones and manned jets as well, a circumstance indicating that the SR-72 could potentially add unprecedented value.
Mach 6 Survivability
When viewed through the lens of pure survivability, a stealthy fighter or drone traveling at Mach 6 is more survivable than even 6th-gen stealth aircraft.
This is of significant tactical relevance because advanced air defenses are improving with high-speed digital networking, narrow-beam precision detection, and even AI-enabled target verification technologies.
Russian media reports have for years claimed that the country’s S-400 and S-500 surface-to-air missiles are capable of tracking and engaging “stealth” aircraft.
These claims may not be proven or accurate in themselves, as even the most advanced Russian air defenses are likely to struggle with identifying or targeting the F-47.
Nonetheless, an ability to fly, surveil, network, and attack at hypersonic speeds would only increase the detection challenges for ground-based SAMS that need to establish a radar “lock” and target “track.”
Air Attack at Mach 6
A hypersonic drone could enter enemy airspace, gather critical intelligence, and exit much too quickly for an adversary to detect, thereby securing an element of surprise and a rapid-strike capability.
A “manned” hypersonic jet would not only increase survivability for pilots but also add additional dwell time options for extended attack.
Most of all, manned hypersonic travel, such as that envisioned for the SR-72 Darkstar, would bring human decision-making faculties to the tip of the spear on the edge of combat at unprecedented speeds.
If networked sufficiently, a hypersonic drone and stealthy attack fighter could complement one another in air combat operations; a hypersonic drone could enter enemy airspace and perform key targeting to identify areas of attack, locate enemy air defenses, and guide a manned hypersonic SR-72 Darkstar platform to integrate human decision-making at hypersonic speeds.
Clearly, it seems for the Air Force, having both the SR-72 Darkstar and 6th-generation fighters like the F-47 makes total sense. What they could do in combination or isolation would be something hard for Russia or China to match.
About the Author: Kris Osborn
Kris Osborn is the President of Warrior Maven – Center for Military Modernization. Osborn previously served at the Pentagon as a highly qualified expert in the Office of the Assistant Secretary of the Army—Acquisition, Logistics & Technology. Osborn has also worked as an anchor and on-air military specialist at national TV networks. He has appeared as a guest military expert on Fox News, MSNBC, The Military Channel, and The History Channel. He also has a Masters Degree in Comparative Literature from Columbia University.
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Iain Morrison
September 10, 2025 at 7:28 am
There is literally no such thing as “SR-72 Darkstar.”
SR-72 (if it even exists) is known as “Son of Blackbird.”
You are confusing the fictional “Darkstar” from Top Gun: Maverick for a real aircraft…
The only real-life aircraft called *DarkStar is the Lockheed-Martin RQ-3 DarkStar drone.