F-35 completes system development, demo flights

The F-35 program has accomplished the final developmental test flight of the System Development and Demonstration (SDD) phase of the program.

"Completing F-35 SDD flight test is the culmination of years of hard work and dedication from the joint government and industry team," said Vice Adm. Mat Winter, F-35 Program Executive Officer. "Since the first flight of AA-1 in 2006, the developmental flight test program has operated for more than 11 years mishap-free, conducting more than 9,200 sorties, accumulating over 17,000 flight hours, and executing more than 65,000 test points to verify the design, durability, software, sensors, weapons capability and performance for all three F-35 variants."

The final SDD flight occurred April 11, 2018, at Naval Air Station Patuxent River, Maryland, when Navy test aircraft CF-2 completed a mission to collect loads data while carrying external 2,000 lb GBU-31 Joint Direct Attack Munitions (JDAM) and AIM-9X Sidewinder heat-seeking missiles.

From flight sciences to mission systems testing, the work completed by F-35 test teams allows Block 3F capability to be delivered to the operational warfighter. More than 1,000 SDD flight test engineers, maintainers, pilots, and support personnel took the three variants of the F-35 to their full flight envelope to test aircraft performance and flying qualities. The test team conducted six at-sea detachments and performed more than 1,500 vertical landing tests on the F-35B variant. The developmental flight test team completed 183 weapon separation tests; 46 weapons delivery accuracy tests; and 33 mission effectiveness tests, which included numerous multi-ship missions of up to eight F-35s against advanced threats.

"The F-35 flight test program represents the most comprehensive, rigorous and the safest developmental flight test program in aviation history," said Greg Ulmer, Lockheed Martin's vice president and general manager of the F-35 program. "The joint government and industry team demonstrated exceptional collaboration and expertise, and the results have given the men and women who fly the F-35 great confidence in its transformational capability."

Developmental flight test is a key component of the F-35 program's SDD phase, which will formally be completed following an Operational Test and Evaluation and a Department of Defense decision to go into full-rate aircraft production.

While SDD required flight test is now complete, F-35 flight testing continues in support of phased capability improvements and modernization of the F-35 air system. This effort is part of the Joint Program Office's Continuous Capability Development and Delivery (C2D2) framework for timely, affordable incremental warfighting capability improvements.