Defense

April 19, 2012

F-35 team hits weapons testing mark

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by Victor Chen
NAS Patuxent River, Md.
Lockheed Martin photograph by Andy Wolfe
Lockheed Martin test pilot Dan Levin flies F-35B test aircraft BF-2 with external weapons pylons for the first time. The test measured flying qualities with external pylons, inert AIM-9X Sidewinder air-to-air missiles and centerline 25 mm gun pod. The F-35B is the U.S. Marine Corps variant of the Joint Strike Fighter, capable of short takeoffs and vertical landings for use on amphibious ships or expeditionary airfields to provide air power to the Marine Air-Ground Task Force. The F-35B is undergoing test and evaluation at NAS Patuxent River before delivery to the fleet.

The F-35 Integrated Test team at Naval Air Station Patuxent River, Md., announced April 16 the completion of a weapons testing milestone.

The ejection of a 500-pound bomb from F-35B test aircraft BF-3 March 29 into a foam-covered concrete pit marked the end of two weeks of testing nine different weapons combinations inside the Joint Strike Fighter’s two internal weapons bays.

“Completion of these weapons ejections into the pit gets us closer to in-flight release of weapons from the F-35,” said Navy Capt. Erik Etz, director of test and evaluation for F-35 naval variants. “It’s another step in expansion of the F-35’s war fighting capabilities.”

Weapons pit-drop testing collects data to measure stresses on the airframe and adjacent stores, ensures proper weapon and suspension equipment function, and validates the separation models for the munitions’ ejection characteristics, including trajectories and velocities.

“We pushed the team pretty hard on those runs to get everything done,” said John Fahnestock, lead government weapons engineer. “We’ll spend some time going through the data to validate our models, but so far it looks good.”

From the cockpit, the pit drops demonstrated minimal effects of weapons launches from the F-35B’s left and right internal bays.

“Having the test weapons on board isn’t really noticeable from the seat,” said Marine Corps test pilot Lt. Col. Matthew Taylor. “But what’s great about the team’s accomplishment is that we’re making progress toward delivering a war fighting aircraft to the fleet.”

Testing included inert versions of the GBU-12 Laser-Guided Bomb, the 1,000-pound GBU-32 Joint Direct Attack Munition and the AIM-120 Advanced Medium-Range Air-to-Air Missile.

More weapons testing on the F-35B and F-35C carrier variant is ongoing at Naval Air Station Patuxent River. Current test events including pit drops, captive carry and instrumented weapons environmental flights, lead up to flight separation testing scheduled for later this year.

The F-35B variant of the Joint Strike Fighter for the U.S. Marine Corps is capable of short take-offs and vertical landings for use on amphibious ships or expeditionary airfields to provide air power to the Marine Air-Ground Task Force. The F-35B is undergoing test and evaluation at NAS Patuxent River prior to delivery to the fleet.




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