Tag Archive for JSF

Navy Hedges bet by looking for a New Son of the Super Hornet

to hedge its bet on the cost strapped JSF, the Navy has quietly released a “market survey” asking the big defense contractors for their “candidate[s]” for “strike fighter aircraft” in the decades to come.

The stealthy F-35 Joint Strike Fighter (JSF) is supposed to one day make up 90 percent or more of America’s combat aviation power. But the program has been hit with all kinds of expensive technical glitches and delays. So the Navy has long hedged against the giant JSF bet by buying more of its beloved F/A-18 Super Hornet; that way, the Navy can keep flying modern fighters, even if the JSFs slip. With this “market survey,” the Navy appears to be making a second hedge: a Son of the Super Hornet – one that would come online after the F/A-18s are retired in the 2030s – just in case the JSF flames out entirely.

the new plane will share deck space and fly in a carrier air wing alongside the JSF and the Navy’s future carrier-based drone, currently known as the X-47B.

More from Gizmodo Story: http://gizmodo.com/5902595/navy-looks-for-new-jet-on-top-of-its-trillion+dollar-model

Joint Strike Fighter Testing Program Update

Aviation Week’s Bill Sweetman had posted a blog on the current status, hurtles, and key major issues in the testing phase for the Joint Strike fighter and its goal to enter initial operational testing in 2015. He has read and reviewed the Pentagon Quick Look Review and give his thoughts on some of the key issues. Some of the finding s were:

-After several sorties above Mach 1.6 there was “peeling and bubbling” of coatings on the horizontal tails and damage to engine thermal panels, the entire test force was subsequently limited to Mach 1.0.

-High level of airframe fatigue issues has been found on the testing aircraft.

-Pilots helmet-mounted display issues is in latency: the image in the helmet lags 130 milliseconds behind sightline movement where the spec is under 40 ms. (So the video is where the pilot’s head was pointed an eighth of a second ago.) That can’t be fixed without changing the JSF’s integrated core processor – the jet’s central brain – and the EO-DAS sensors. Even the backup helmet faces buffet and latency issues, simply for symbology.

-The underwing fuel dump system on the JSF doesn’t get fuel clear of the aircraft surfaces, so that fuel accumulates in the flaperon and may get into the integrated power package (IPP) exhaust. That creates a fire hazard, particularly on a ship deck after landing. Fuel dumping has been banned except in an emergency. Two unsuccessful modifications have been tried on the F-35B.

-failure” caused IPP parts to puncture a fuel tank – is turning out to be unreliable. It’s supposed to last 2,200 hours, but so far in the flight test program, 16 IPPs have been removed and replaced – a process that takes two days of 24-hour work.

-The arrester hook issue has been reported. In the first round of tests, the hook failed to catch the wire once. The QLR notes that tests of a minimal modification – a reprofiled hook with different damper settings. Studies are already underway of changing the hook’s location – the basic problem is that the designers put the hook closer behind the main landing gear than that of any current or recent Navy aircraft so hard for pilots to get use to the new landing envelope.

-flight tests have not gone beyond 20 degrees angle of attack, and higher-than-predicted buffet loads have been experienced when the JSF is in a high AOA

-Some negative Stealth and Thermal issues has arisen and also need to be addressed.

Read more at:

Bill Sweetman original Blog: Ares A Defense Technology Blog

Pogo Link to the Original copy of the Quick look report:http://www.pogo.org/resources/national-security/f-35-jsf-concurrency-quick-look-review-20111129.html

New Carrier EMALS launches F-35C in testing

The Navy catapulted an F-35C into the air using its new Electromagnetic Aircraft Launch System for the first time on Nov. 18, the service announced Monday.

Testing the F-35C on EMALS provided an early opportunity to evaluate technical risks and began the process to integrate the carrier variant Joint Strike Fighter with the future carrier fleet aircraft launching system.

EMALS is the key to the future of aviation in not one, but two great navies — when the British switched their order from F-35Bs to Cs, they also became dependent on the success of the U.S. Navy’s electromagnetic catapults. In fact, you could argue the Royal Navy has an even greater need for EMALS, given that its Queen Elizabeth-class aircraft carriers won’t be built with steam propulsion.

Read more: http://www.dodbuzz.com/2011/11/28/the-future-is-here-emals-launches-f-35/#ixzz1f71n2puR
DoDBuzz.com

New wave of uncertainty on F-35 by DOD

Various member of the DOD are wavering support on the JSF / F-35 Lightning 2 program. The article also opens a crack again for a second GE designed engine.
Link for more info

http://www.dodbuzz.com/2011/10/13/new-wave-of-uncertainty-on-f-35/