Key Points and Summary – One of the biggest complaints about the F-35 is its limited range. The U.S. Air Force is now trying to fix that.
-The U.S. Air Force is officially evaluating the addition of external fuel tanks to its F-35A stealth fighters to extend their combat range, according to the Fiscal Year 2026 budget proposal.
-The request allocates $431.8 million to study fitting the Block 4 variant with either drop tanks or conformal fuel tanks.
-This move, which would increase the F-35’s range and reduce its reliance on aerial refueling, signals a strategic trade-off, as carrying external stores significantly compromises the aircraft’s stealth capabilities.
-The plan is for pilots to jettison the tanks before entering highly contested airspace, restoring the jet’s low-observable profile.
Why the Air Force Is Sacrificing F-35 Stealth for Long-Range Performance
As part of its proposed Fiscal Year 2026 budget, the United States Air Force is seeking funding to evaluate the potential addition of external fuel tanks to the F-35 stealth fighter jet.
According to the recently released budget request, a proposed design is expected to increase the combat radius of the fifth-generation jet, while sacrificing some of its stealth capabilities.
The budget allocates $431.8 million for the Block 4 F-35A variant, following more than a decade of discussions about the possibility of fitting the aircraft with outboard tanks.
Over the last decade, studies have explored two possible tank configurations: one with a larger capacity, suitable for subsonic flight, and another with somewhat reduced volume, better suited for supersonic flight.
According to the proposed budget, the Air Force intends to evaluate the feasibility of the plans to support long-range F-35 missions.
Reports say it is unknown if the Air Force is considering drop tanks, a form of detachable fuel tank mounted externally under the wings or fuselage, or Conformal Fuel Tanks (CFTs), a streamlined fuel tank that is integrated more closely with the airframe amd conforms to the shape of the aircraft’s fuselage.
The news suggests that the Air Force is concerned about the long-range ability of F-35 jets, with the proposed plans designed to reduce dependence on aerial refueling despite making the aircraft more visible to radar. Nonetheless, Air Force planners reportedly state that upgraded F-35s will be able to jettison external tanks before entering contested airspace, therefore returning to full stealth abilities in high-threat environments.
The news comes as the Pentagon announces significant changes to its procurement and budgeting priorities, shifting focus toward advanced, next-generation hardware. The Pentagon has already slashed its planned F-35 orders for fiscal year 2026 by half, with 24 F-35A jets expected despite original plans to procure 48.
The proposed upgrades form part of a broader F-35 Block 4 modernization project designed to improve the capabilities of the F-35 fifth-generation fighter jet. It entails 75 major upgrades across all three F-35 variants, and constitutes the most extensive evolution of F-35 capabilities to date.
Modernization plans span missile-carriage capacity advancements, target recognition improvements, and new non-kinetic electronic warfare capabilities.
F-35 Program Executive Officer Lt. Gen. Michael Schmidt said in 2024 that the program is designed to ensure that the fifth-generation platform “remains relevant against rapidly evolving threats.”
Schmidt also confirmed plans to increase the fighter jet’s computing power, noting that new onboard systems will feature “significantly more computing power and memory than the legacy infrastructure.”
The broad suite of upgrades is expected to benefit “all variants and nations” in the F-35 program.
About the Author:
Jack Buckby is a British author, counter-extremism researcher, and journalist based in New York. Reporting on the U.K., Europe, and the U.S., he works to analyze and understand left-wing and right-wing radicalization, and reports on Western governments’ approaches to the pressing issues of today. His books and research papers explore these themes and propose pragmatic solutions to our increasingly polarized society. His latest book is The Truth Teller: RFK Jr. and the Case for a Post-Partisan Presidency.
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