Key Points and Summary – Rumors, factory expansion, and whispered timelines keep the SR-72 “Darkstar” idea alive, but nothing is confirmed.
-Lockheed’s Skunk Works is adding secure, flexible production space—a clue that something big is underway—yet there’s no public contract trail.
SR-72 from Lockheed Martin. Image Credit: Lockheed Martin.
-Meanwhile, budgets and scarce engineering talent are already absorbed by the Air Force’s F-47/NGAD and the Navy’s F/A-XX, raising doubts that a hypersonic successor to the SR-71 can be developed in parallel. Still, DoD may need to give Lockheed a marquee program to preserve capacity.
-For now, hints and secrecy abound; proof will have to wait—at least for now—behind Palmdale’s closed doors a while.
What Might Happen With the “SR-72” Program
WARSAW, POLAND – Rumors, conspiracy theories, and anonymous “insiders” have led to endless snippets of information and small bits of evidence that, when pieced together, suggest the existence of a program designed as a replacement for the SR-71 Blackbird, the SR-72.
Ever since the SR-71 airframe was retired in 1998, the prevailing conventional wisdom has been that the US Air Force (USAF) would never continue indefinitely into the future without a super high-tech, surveillance platform as revolutionary as the SR-71 was back then.
This convention has given rise to numerous mystery aircraft that have become legendary, their existence never proven or confirmed.
However, they were always assumed to be the answer to the USAF’s next-generation requirements, given the SR-71’s retirement from service.
The most well-known of these was the supposed “SR-91 Aurora” aircraft. A supersonic or even hypersonic air vehicle that has never been seen, and is widely accepted as a myth.
What adds weight to the belief that the program does exist is a plethora of circumstantial evidence:
There has been no public official confirmation from the USAF that the program does indeed exist. There has been no paper trail of contracts let to the presumed contractor, Lockheed Martin (LM), or confirmed program offices with responsibility for something as exotic as a hypersonic, manned, high-altitude spy plane.
However, what sustains the belief in the program among those confronted with the reality of no confirmation of what is now being called the “SR-72 Darkstar” is that LM has never denied the program’s existence.
Behind Closed Doors on SR-72
There are tantalizing clues about what could be taking place in the secure spaces and closed, “black project” design facilities in the world. The most famous of these is the complex where the SR-71 was designed, as well as the U-2 and the F-117A Stealth Fighter.
That facility is the infamous Skunk Works in Palmdale, California, where the late Clarence “Kelly” Johnson designed and built these famous, secret aircraft. The development of the technology and how each successive aircraft was a new generation of innovation constitute much of the history of stealth technology in the US.
SR-72 Darkstar or Son of Blackbird. Image Credit: Lockheed Martin.
What spurs on those who are convinced the Darkstar is real and in development—and that it may have even actually already flown—are the recent new buildings going up at the Skunk Works itself. There is now evidence of the construction of what is called a large “intelligent, flexible factory” at the Skunk Works site.
This new facility was reportedly designed for the advanced production of new, classified projects of a size that might not all fit inside the current buildings and facilities that exist at the Palmdale location.
“In previous decades you might have been able to get away with keeping a classified, large aircraft outside in the open—maybe covered with a tarp or parking it underneath a ‘run station’ with a roof over it. All of this would keep out the prying eyes of overhead satellite surveillance,” commented a US specialist on these very secret programs.
“But in the present day that is no longer possible. There are way too many people with private or commercial drones, and so many ways to acquire commercial-grade imagery. Anything today left out in the open would be compromised within a very short period of time,” he concluded.
Dividing Up The Pie
Again, these are unconfirmed reports, but testing for a prototype for the SR-72 had been previously projected to begin in the mid-2020s. However, no timelines have been revealed for when testing will be completed or the overall developmental cycle for the program.
There is a bigger issue, however. Is it physically possible for this program to move forward, given the current demands on the US military aerospace sector? There have been numerous arguments that the US defense industry lacks sufficient facilities and skilled personnel to be able to simultaneously design and build both the USAF’s F-47 and the US Navy F/A-XX, both 6th-generation fighters.
If that is the case, then how would it be possible to also finish developing and building something like the SR-72? The industry would be stretched too thin, goes the argument, to be able to develop and build any of those three programs competently.
However, the fact remains that in order to keep LM alive, the Pentagon will have to give the famous stealthy planemaker something to do. Giving them the SR-72 Darkstar, or whatever the program is to be called, is about the only major project left that would provide LM enough of the “pie” that makes up the US defense budget.
Something is definitely happening inside the Palmdale facility, which we may someday find out about. There is something in the works, but we’re not meant to know what it is just yet.
About the Author: Reuben F. Johnson
Reuben F. Johnson has thirty-six years of experience analyzing and reporting on foreign weapons systems, defense technologies, and international arms export policy. Johnson is the Director of Research at the Casimir Pulaski Foundation. He is also a survivor of the Russian invasion of Ukraine in February 2022. He worked for years in the American defense industry as a foreign technology analyst and later as a consultant for the US Department of Defense, the Departments of the Navy and Air Force, and the governments of the United Kingdom and Australia. In 2022-2023, he won two awards in a row for his defense reporting. He holds a bachelor’s degree from DePauw University and a master’s degree from Miami University in Ohio, specializing in Soviet and Russian studies. He lives in Warsaw.
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