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F-35 vertical landing  (Source: DefenseNews)
Jets have significant issues with engines and other componnets

The F-35 Lightning II program can't win for losing. The long running issues with the aircraft have been well documented and have led to delays in the program. Many of the flight issues with the F-35 have centered on the more mechanically complex F-35B STOVL version of the fighter aircraft. A new report has surfaced that highlights some previously unknown problems with the F-35 program.

According to a report compiled by the Pentagon Director of Operational Test and Evaluation, the F-35 aircraft all suffer from various problems with handling, avionics, afterburner, and the helmet-mounted display systems. The F-35A and F-35B variants are specifically said to suffer from "transonic wing roll-off, [and] greater than expected sideslip during medium angle-of-attack testing" according to the report. The report also notes that many of the components being used in the aircraft are not as reliable as expected.

The F-35B has had various issues with subcomponents in the past, specifically the ones that allow the door behind the cockpit to open so the aircraft can get the air needed for vertical landing. The F-35B has made successful vertical landings recently.

One key problem that is common on the aircraft is an issue described as afterburner "screech" reports Defense News. Apparently, the F-135 engine provided by Pratt and Whitney has a problem where airflow causes severe vibrations that prevent the engine from reaching maximum power.

The helmet-mounted display system in the aircraft is also having issues, but the report doesn't delve into this exact problems. The F-35 has no traditional heads-up display like other aircraft flying today - all pilot data is on a display inside the helmet.

Lockheed martin spokesman John Kent said, "The F-35 air system advances Helmet Mounted Display technology to capabilities not flying today on any other tactical platform. With this advancement in technology come challenges that the program is actively managing. The challenges are being worked with the supplier." Kent goes on to say, "While there are no current plans to change suppliers, options are being considered in parallel that mitigate the most stressing issues. Flight testing is proceeding with the HMD installed and used with no safety of flight concerns."

The report also mentions an issue with the aircraft’s onboard inert Gas Generation System that helps prevent oxygen from building up inside the fuel tanks where it becomes a fire hazard. The report recommends a redesign for the system. 

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Friggin laser beams
By DoeBoy on 1/19/2011 4:59:36 PM , Rating: 0
If we just had friggin land based laser beams we wouldn't need a new aircraft and they would provide plenty of defense. I am with the group that doesn't believe in invading countries every 10 years and being self sufficient so you do not have to capitulate because of "oil" or other reasons. We bring enough hatred and distrust onto our country from all the actions we take around the world including killing loads of innocent people that all have soon to be terrorist family members wanting revenge.

RE: Friggin laser beams
By Chaser on 1/19/2011 5:05:51 PM , Rating: 1
well at least you don't hate the U.S. We need more patriots and brilliant military experts like you that share your world view.

RE: Friggin laser beams
By mmatis on 1/19/2011 10:25:47 PM , Rating: 2
Lasers do not work particularly well through fog or clouds.

RE: Friggin laser beams
By RubberJohnny on 1/19/2011 11:11:49 PM , Rating: 2
If the laser is powerful enough to take down a plane I very much doubt it will have a problem going through a cloud...

RE: Friggin laser beams
By ikaika on 1/20/2011 12:21:51 AM , Rating: 2
Perhaps he meant to say Sharks. With friggin' laser beams mounted to their heads.

RE: Friggin laser beams
By drycrust3 on 1/20/2011 2:02:33 AM , Rating: 3
ZK758: Control Tower, Are we cleared to land?
CT: Roger.
ZK758: Control Tower ... we can't see the runway ... there's some fog on the runway.
CT: Copy. One moment ... (loud buzzing sound) ... how does that look?
ZK758: Copy. Ohhhhhh ... that's good. Just one small cloud between us and you, do you think you can zap that too.
CT: Roger ... (loud buzzing sound) ... how's that look ZK758 ... ZK758 ... ZK758 ...

RE: Friggin laser beams
By Amiga500 on 1/20/11, Rating: 0
RE: Friggin laser beams
By Calin on 1/21/2011 2:31:32 AM , Rating: 1
The military of the U S of A is not used to protect its land - it's used to invade other countries.
Land-based lasers would be nothing in something like the First War on Iraq or Second War on Iraq, or even the War on Afghanistan

"Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." -- Bill Gates
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