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Software issue could have cause engine stall  (Source: Defense News)
F-35B STOVL version also has hinge issue preventing STOVL operations

The Lockheed Martin F-35 program has been plagued by cost overruns, and issues with software/systems on some variants. The program has hit another setback with flight-testing for the entire F-35 fleet being grounded after a fuel flow issue was noted in lab testing.

The Pentagon announced the F-35 fleet was grounded on October 1 according to
Defense News. The main issue for all variants of the F-35 that lead to the grounding was a software issue with the three fuel flow boost pumps that are used in flight. The software problems caused incorrect sequencing of the boost pumps and was discovered in lab testing.

Pentagon spokeswoman Cheryl Irwin said, "This could have possibly triggered a shutdown on the three boost pumps, which could potentially cause an engine stall [if left uncorrected]." Irwin stated that the worst-case scenario of engine stall was highly unlikely but "prudence dictated a suspension of operations, temporarily, until the fuel boost pump signal timing was corrected."

Another issues has caused F-35B testing to be prohibited from testing in STOVL mode due to an issue with the auxiliary inlet door hinge on test aircraft BF-1. The issue with the aircraft was noticed on post flight inspection according to spokesman John Kent form Lockheed Martin. The auxiliary inlet doors open to provide additional air to the F-35B in STOVL operations.

Flight operations in STOVL mode will resume once the issue has been identified and corrected. Flight testing for the fleet is set to resume on October 5, Lockheed Martin engineers reportedly have software to fix the pump-sequencing ready and are performing tests on the software to ensure correct operation.

The F-35B STOVL fighter had previous delays due to subsystem component failures. The parts that were failing at higher than expected rates before including door actuators, valves, switches, and cooling fans.

The DoD and Lockheed recently agreed to 32 F-35 fighters to be included in the LRIP-4 purchase.



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Normal
By gamerk2 on 10/4/2010 11:19:39 AM , Rating: 5
Guys, this is the point of flight testing. I do a lot of software work like this, and I'm not terribly shocked something like this popped up. Odds are, a new software build will be out within a week or two, and the F35 back on its feet.

I'm not a fan of the plane, but lets bash it for its actual faults, and not its testing program.




RE: Normal
By Amiga500 on 10/4/2010 1:42:30 PM , Rating: 2
Yeap.

I'm no fan of the F-35, but bashing it for a teething issue is silly.

More worrying is the lack of A2A radar modes before 2016... particularly for countries looking to the F-35 to replace their "jack-of-all trades" F-16s....

If I'd my way I'd scrap the thing and buy Gripens instead. Your probably going to be looking at more than 3x Gripens per F-35 over the life cost of both...

I for one do not see the F-35 offering that much of an advantage. Quantity has a quality all of its own - particularly when the numbers of the higher quality product are insufficient for rudimentary operation schedules...


RE: Normal
By NullSubroutine on 10/4/2010 1:46:44 PM , Rating: 2
The disadvantage of quantity over quality when it comes to air-fighters is that it requires you to have more highly trained pilots. Some nations have a heck of a time keeping up with the world major countries in terms of pilot training and experience, this isn't solved by having quantity of planes over quality.


RE: Normal
By Reclaimer77 on 10/4/10, Rating: -1
RE: Normal
By AssBall on 10/4/2010 2:38:48 PM , Rating: 2
Part of the F-35 development funding, though, came through the inclusion of several other nations with intent to support and buy.

Oh, and I too would definitely never want to replace the F-35 with a sad zero stealth no VTOL Gripen. It's a nice enough plane but our super-hornets are more than a match.


RE: Normal
By Reclaimer77 on 10/4/2010 2:47:11 PM , Rating: 2
quote:
Part of the F-35 development funding, though, came through the inclusion of several other nations with intent to support and buy.


Ok good call. I confess this completely slipped my mind. But when you usually hear about "milti-national funding" for something, it always ends up being the U.S carrying the Lions Share. Do you know what percentage they kicked in? I can't find it online.

quote:
Oh, and I too would definitely never want to replace the F-35 with a sad zero stealth no VTOL Gripen. It's a nice enough plane but our super-hornets are more than a match.


Amiga usually makes absurd statements regarding the military. But I agree, that took the cake. The Grippen went opperational in 1997 and a whopping 204 aircraft have been delivered from Saab to date. Not exactly cutting edge OR in high demand. And this guy would "scrap" next generation fighter development to buy 13 year old fighters that barely stack up to the F-16!?


RE: Normal
By Amiga500 on 10/5/2010 2:38:44 AM , Rating: 2
quote:
The Grippen went opperational in 1997 and a whopping 204 aircraft have been delivered from Saab to date. Not exactly cutting edge OR in high demand.


Since when did modern fighter sales actually become about technical ability instead of politics?!?!

Oh, and not cutting edge? Seriously, if your going to comment, at least make the comments knowledgeable, not absurd. The Gripen NG already does virtually all of the fancy network-centric stuff the F-35 is slated to do... only it does it now and for a fraction of the cost.

But, I guess it is quite hard for *some* very insecure Americans to acknowledge that sometimes their stuff is not the best in the world.


RE: Normal
By Reclaimer77 on 10/5/2010 1:26:14 PM , Rating: 2
quote:
Since when did modern fighter sales actually become about technical ability instead of politics?!?!


Oh please. Explain to me how a supposedly fantastic modern fighter from a neutral country, that's low cost, isn't being bought by ANYONE in significant numbers. Explain to me how that's "politics".

In fact here's one for you, considering their paltry productions numbers, do you even know for a fact that Saab COULD provide enough airframes and parts for a deployment size as large as the U.S would require? No, you don't!

quote:
But, I guess it is quite hard for *some* very insecure Americans to acknowledge that sometimes their stuff is not the best in the world.


Nice try but it's not even about that. It's like you're always on Amiga Planet or something. When have we ever depended on foreign firms for our air power? If you want to challenge the existing time-proven doctrine, fine. But don't flip out on others because we don't go along with you, that's crazy.

Seriously, it's bad enough we went from the worlds leading manufacturer to a country that buys everything from China and Japan. But now you want to completely drive the stake into the heart of the country by buying off the shelf fighter jets from foreign firms! Brilliant thinking there Amiga...

It looks like YOU are the one bringing politics into things actually with that kind of sophomoric cop-out. I guess Boeing was stupid "wasting" the money developing the Dreamliner too huh? Because they could have just bought a bunch of Airbuses!!


RE: Normal
By Amiga500 on 10/6/2010 2:16:26 AM , Rating: 1
quote:
Oh please. Explain to me how a supposedly fantastic modern fighter from a neutral country, that's low cost, isn't being bought by ANYONE in significant numbers.


Pick a "competition", and I'll tell you what happened.

Say Poland for instance, recently acquired F-16s... rotten deal. Here is a quote from the conclusions of a report on it:

quote:
Politics played the predominant role in the Polish government’s decision to buy the F-16. Szmajdzinski attempted to counter this conclusion by stating the decision was based “on merit, not politics.”136 The facts support otherwise. The Poles were acutely aware of the suffering of their country during the 20th century. Poland remained distrustful of Russia to the east, Belarus to the north, and Germany to the west. U.S. and NATO membership remained Poland’s guarantee of continuing freedom from the dominance and yoke of Russia. The F-16 was representative of Poland’s relationship with both the U.S. and NATO. Poland supported the U.S. policy toward Iraq which created a schism between Warsaw and Paris at about the same time Poland was deciding which fighter aircraft to purchase.


quote:
In fact here's one for you, considering their paltry productions numbers, do you even know for a fact that Saab COULD provide enough airframes and parts for a deployment size as large as the U.S would require? No, you don't!


That little paragraph just highlights how truly out of your depth you are.

You are attempting to argue that Saab, who have produced 200 Gripen odd airframes, are in a worse position to fulfill an order than Lockheed, who have produced what... 10 JSF airframes (none of which have reached operational capability)? Of course, it would be beyond Saab to construct more buildings and assembly centres... and of course it is beyond their supply chain (which comprises such small aerospace companies as GE) to ramp up their production.

Good man. You'd probably argue about the colour of shite too.

quote:
When have we ever depended on foreign firms for our air power?


HHmmmmm, lemme see.

- Required numerous design features of the Miles M.52 for supersonic flight.
- The best American fighter of all time, the North American Mustang, flew with Rolls Royce Merlins in it.
- The Grumman Panther had Rolls-Royce Nenes and later Tays in it.
- The current Marine Corps Harriers were built by both McAir and BAe, they have Rolls-Royce Pegasus engines in them.
- Rolls-Royce designed the lift fan in the current JSF.

quote:
I guess Boeing was stupid "wasting" the money developing the Dreamliner too huh?


Actually, the fundamentals of the Dreamliner's advances came from spin-offs from the money "wasted" on the sonic cruiser.

But you being all knowledgeable about aviation actually already knew all that.... didn't you? If not, maybe you should stop and realise you don't really have a clue what your talking about.


RE: Normal
By Master Kenobi (blog) on 10/7/2010 5:40:03 PM , Rating: 2
quote:
But when you usually hear about "milti-national funding" for something, it always ends up being the U.S carrying the Lions Share. Do you know what percentage they kicked in? I can't find it online.

Yea, the US is still carrying the lions share of the bill. Check these figures out.

http://en.wikipedia.org/wiki/Lockheed_Martin_F-35_...


RE: Normal
By Amiga500 on 10/5/2010 2:32:22 AM , Rating: 2
quote:
Oh, and I too would definitely never want to replace the F-35 with a sad zero stealth no VTOL Gripen. It's a nice enough plane but our super-hornets are more than a match.


I guess you need to talk to those that faced them during various red flags then....

As for super hornets being a match - I won't even dignify that with a serious response.


RE: Normal
By FITCamaro on 10/4/2010 10:11:06 PM , Rating: 2
Exactly. The jet uses a HUGE amount of code. There are bound to be software bugs.


RE: Normal
By Shadowmaster625 on 10/5/2010 8:10:59 AM , Rating: 1
Nope you're wrong. The point is to spend money and bankrupt the country. Doing an excellent job of it too.


Just normal development
By Beenthere on 10/4/10, Rating: 0
RE: Just normal development
By Gul Westfale on 10/4/2010 12:18:12 PM , Rating: 5
and with OSX:
"it's a feature, not a bug. it's meant to be that way. see, it's a part-time glider. it saves the environment."-steve j.


RE: Just normal development
By JazzMang on 10/4/2010 1:17:43 PM , Rating: 4
"You're holding the throttle control wrong"


RE: Just normal development
By Farfignewton on 10/4/2010 8:25:18 PM , Rating: 5
Missile are obsolete. iFighter doesn't support them, because pilots don't want them. iFighter 1.5 will ship with a newer, shinier weapon in q1 of 2011.


Almost
By Sazabi19 on 10/4/2010 2:51:18 PM , Rating: 2
Makes you miss the analog or FBW days doesn't it? When we could actually crank out aircraft and they worked. We are going to lose this superiority if we don't get our act together.




RE: Almost
By CharonPDX on 10/4/2010 4:47:57 PM , Rating: 1
quote:
or FBW
???

If the F-35 isn't analog, and it isn't Fly By Wire, then what is it?

By and large, if you don't have physical (hydraulic, etc,) control of the control surfaces, then you are operating them through a computer of some kind. That is what is meant by "Fly By Wire"

Unless you mean "completely uncontrolled control surfaces", I can't think of any other type.


RE: Almost
By Chillin1248 on 10/4/2010 10:57:56 PM , Rating: 2
I remember watching an interview with a pilot, who has flown air-superiority fights for over thirty years, and listening to the following quote:

"I miss the old Mirage 3. Today in the F-16 you don't fly the plane, the plane flies you. You just tell it what you want it to do."

In Fly-By-Wire aircraft, the pilot is just telling what he wants the aircrafts computer to do, and then the computer tries to comply with the pilots wishes to the greatest possible degree.

In planes like the F-22, the FBW actually limits the aircrafts actual maneuverability, as the plane itself can do maneuvers beyond the pilots tolerances.

-------
Chillin


I'm in ur airframes....
By dflynchimp on 10/4/2010 11:16:13 AM , Rating: 4
Stealing ur engine source code.




How big is the fleet?
By BernardP on 10/4/2010 11:42:00 AM , Rating: 2
How many planes in the "fleet" as of today?. Things would not look as bad if the reference was to "all the F-35 prototypes."




RE: How big is the fleet?
By nafhan on 10/4/2010 12:06:28 PM , Rating: 2
According to Wiki (yeah I know): 13 "flight-test aircraft" have been built.


BSOD!!!
By dsumanik on 10/4/10, Rating: 0
RE: BSOD!!!
By Belard on 10/4/2010 5:07:12 PM , Rating: 3
Since the movie came out in 1986...

There would be no Blue Screen of Death.

At most, an Amiga GURU meditation. ;)

(Black screen with a flashing red box)


Not a mistake
By Dankbuddha on 10/4/2010 1:04:18 PM , Rating: 2
Steve Jobs: "You're flying it wrong."




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