CANBERRA, — June 19, 2026 : The Royal Australian Air Force (RAAF), in partnership with the United States Air Force, has successfully completed the first joint Weapon Fill Measurement Vehicle (WFMV) flight test on an F-35A Lightning II, marking a significant advancement in allied weapons integration and certification efforts.
The world-first test was conducted in late April 2026 by RAAF No. 75 Squadron. During the mission, an F-35A was flown with a specialized test weapon mounted on the aircraft to collect engineering data on weapon behavior under operational flight conditions.
Supporting Future Weapons Integration
The primary objective of the flight test was to gather detailed data on the flight environment experienced by weapons carried on the F-35A. The information will support current and future weapons certification programs by providing engineers with a better understanding of aerodynamic loads, vibration levels, and other factors affecting weapon performance during flight.
Defense officials expect the data to help reduce the time required to certify new weapons for operational use. Accelerating the certification process will allow advanced capabilities to be introduced to frontline squadrons more efficiently.
Enhancing Combat Readiness
The initiative supports efforts to strengthen combat readiness and maintain the operational effectiveness of allied F-35 fleets. Faster weapons integration is considered increasingly important as Australia and its partners continue to adapt to evolving security requirements across the Indo-Pacific region.
The F-35A Lightning II is Australia's primary fifth-generation multirole fighter aircraft and forms a key element of the Royal Australian Air Force's air combat capability. Australia is acquiring a total of 72 F-35A aircraft, which are operated from major bases including Williamtown and Tindal.
Joint Australia-U.S. Collaboration
The flight test brought together several specialized organizations from both countries.
Australian participants included:
- Air Warfare Engineering Squadron
- Aircraft Research and Development Unit (ARDU)
- No. 75 Squadron
- Air Combat Systems Program Office (ACSPO)
U.S. participants included:
- U.S. Air Force Seek Eagle Office (AFSEO)
- U.S. 96th Range Support Squadron (96 RANSS)
The activity was conducted under the Aircraft Stores Compatibility Project Arrangement (ASC PA), a long-standing bilateral agreement between Australia and the United States. The arrangement facilitates weapons testing, engineering cooperation, data sharing, and the reduction of duplicated certification efforts.
Strengthening Allied Interoperability
The successful completion of the WFMV flight test demonstrates the growing level of technical cooperation between Australia and the United States in the field of advanced air combat systems. The project is expected to support future weapons integration programs while improving interoperability between allied air forces operating the F-35.
Results from the test are currently being analyzed and will contribute to ongoing certification activities. The data gathered during the mission is expected to play an important role in advancing future weapons capabilities for F-35 operators and improving the aircraft's overall operational effectiveness.
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