The U.S. Air Force has included in its 2026 budget funds to study the integration of external fuel tanks on the F-35, reviving an old project that never came to fruition.
The measure aims to extend the aircraft’s range, especially on long-range missions where aerial refueling may be risky. The initiative is part of the Block 4 modernization, which already includes radar, weapons, and electronic systems upgrades. While external tanks reduce the jet’s stealth capabilities, they could be essential in scenarios where range is a priority.
The idea is not new: Lockheed Martin had already developed under-wing tanks between 2004 and 2007, but aerodynamic problems led to the cancellation of the project. Recently, Israel worked on conformal fuel tanks (CFTs) and ejection models for its F-35I variant, aiming for non-refueled strikes against distant targets, like Iran. Now, the U.S. is evaluating both loose tanks and CFTs, but no details on timelines or costs have been provided yet.
The project may particularly benefit the F-35C of the Navy, as the sixth-generation F/A-XX fighter program has been suspended.
In addition to extending range, external tanks would allow for longer patrol times and reduce dependence on tanker aircraft, which are increasingly vulnerable in modern conflicts. The Air Force is also looking into alternatives such as refueling drones and in-flight refueling systems integrated with other fighters. Meanwhile, the Block 4 program is facing delays due to issues with the Technology Refresh 3 (TR-3), an update needed before the new capabilities can be added.
The Pentagon confirmed that all F-35 variants are being considered for the external tanks, but there is no set timeline. The decision reflects the growing concern of the U.S. regarding operations in the Indo-Pacific region, where longer distances and anti-aircraft threats require jets with greater autonomy.
While the F-35 already outperforms many conventional fighters in range and stealth, external tanks may be the key for even more strategic missions in the future.
Source: The War Zone | Photo: X @usairforce | This content was created with the help of AI and reviewed by the editorial team
