Vaikea kovin perinpohjaisesti yllättyä siitä, että testatessa löytyy ongelmia. Tämä oli kyllä sen verran merkittävä, että 4kk myöhästyy IOC ilmavoimilta. Ohjelmistokehitys ei ole helppoa.LMn setä taputtaa karvaisia käsiään yhtään ja hurraa fanipoikien edessä että F35 on paras kone koko maailmassa.
https://fcw.com/articles/2016/03/23/f35-software-glitch.aspxAt issue is the stability of a block of software that leads to timing problems between the radar and main computer, which causes the radar to shut off and reboot about every four hours of flight time. Officials hope that a fix will reduce incidents to once every eight to 10 hours, which Bogdan said is "good enough."
"With 8 million lines of code in the airplane, it is not unusual for both legacy airplanes and modern fifth-generation airplanes every now and then to have to reset one of the sensors in flight or have an automatic reset," he added. "That is not an uncommon situation."
He said the root cause of the stability problems has been identified, and fixes have been tested in the lab. If flight tests are successful, the patches will be added to a new version of a block of the F-35's software.
The glitch is in the 3i block, which includes a new helmet and display system. The final block, called 3F, is required for full warfighting capability. Bogdan said that phase has the most software risk because it has some of the same stability issues as the 3i block and because it must fuse information from a number of sources, such as satellites and ground stations.
The program office anticipates completing all 3i software testing this spring. Full 3F capability be fielded by late fall of 2017, Bogdan said.
Ja tarkempi kuvaus ongemasta:
https://www.flightglobal.com/news/a...readied-to-prevent-further-f-35-delay-423497/“What the pilots are seeing is when they take-off and they need to use the sensors, particularly the radar, the communication between the radar and the computer is mistimed,” says Lt Gen Chris Bogdan.
As timing delays pile up, the radar enters a degraded mode or shuts down completely, he says, requiring several minutes to restart. The software causes a sensor to shut down an average of once every 4h, he adds.
Puheet ja teot: https://www.flightglobal.com/news/a...e-panel-approves-funds-for-11-f-35s-a-424747/
just days after the developmental aircraft’s many flaws were enumerated at a Senate hearing, the US House Armed Services Committee agreed on a defence policy that would fund 11 more F-35s in fiscal year 2017, on top of the 63 aircraft already requested by the US services.
Congress, despite many members being vocal critics of the aircraft, has made adding money for F-35s something of an annual tradition, having also added 11 more Lightning IIs than requested in the current fiscal year 2016 defence budget.
Though US lawmakers decry the concurrent development and production of such a sophisticated and technologically difficult piece of military hardware, they don’t seem at all concerned about bolstering production with extra aircraft.
The Pentagon’s top weapons tester J Michael Gilmore told Congress this week that after fifteen years of development and one year out from the planned start of operational testing in late 2017, the F-35 “remains immature and provides limited combat capability”, although corrections are being made.
The Defence Department’s acquisition czar Frank Kendall says the “F-35 is no longer a programme that keeps me up at night” and testing is about 90% complete. “I do expect additional discovery, but I will be surprised if a major design problem surfaces at this point,” he says.
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