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wrightwing
PostPosted: Jul 30, 2012 - 05:20 PM Reply with quote Back to top
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jeffb wrote:
Gets better after what? The grey points on the graph are tagged "coverage". You'll notice that they are interspersed, seemingly randomly, with the moderate and severe buffet markers and that one is frequently right next to the other, that is, normal flight to severe buffet without the pilot doing anything particularly special. Remember that this was largely unexpected in this particular flight regime and that the real testing begins in the next few months with the results probably not available till 2014 (when's IOC again?).


The full envelope hasn't been explored yet. These charts don't represent what hasn't been tested yet.

Quote:

Voice command sounds like fun:
PILOT: T.a.a.a.r.r.r.r.g.g.g.e.e.e.t.t.t...t.t.t.h.h.h.r.r.r.e.e.e.e.e...f.f.f.i.i.i.r.r.e.e.e.!.!
F-35: Voice command not recognized. Say again.
PILOT: T.a.a.a.r.r.r.r.g.g.g.e.e.e.t.t.t...t.t.t.h.h.h.r.r.r.e.e.e.e.e...f.f.f.i.i.i.r.r.e.e.e.!.!
F-35: Voice command not recognized. Say again.
CLIPPY:(ping)Hi, I'm clippy, you appear to be trying to...launch a short range air to air weapon. Can I help?
PILOT: A.a.a.a.a.a.ah.h.h....e.e.j.j.j.e.e.c.c.t.t.!.!...e.e.e.j.j.j.e.e.e.c.c.c.t.t.!.!
Laughing


Presumably, if the pilot is pulling high Gs, then his hand is on the control stick(which includes the trigger, and toggle for target selection). The beauty of spherical engagement is that high G turns aren't necessary to engage a target. That doesn't mean that they're not available in the event that it becomes necessary to turn hard.
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redbird87
PostPosted: Jul 30, 2012 - 07:58 PM Reply with quote Back to top
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wrightwing wrote:
You misunderstood my comment first of all. Secondly, it's not arrogance to state a fact. On a systems level, there aren't any near peers, much less anyone remotely close to surpassing the variety of capabilities that are in our inventory. You're using simplistic reasoning, in order to create a scenario that fits your narrative. I simply explained the technical limitations which would make your scenario unlikely. If you don't know that you need to jam a platform, or where that platform is, or have a jammer that not only has the capability to jam the particular emitter in question, but is in the correct location, of have enough of these jammers, in the correct locations, etc.. it's simply not feasible to do what you're asserting. Then factor in the fact that these emitters aren't stationary, so unless the jammers are on airborne platforms, that can maintain the same aspect at all times(and assuming that the F-35s, etc... won't utilize any offsetting tactics), then the potential to jam would only exist in very narrow windows of time.


Certainly I have no arguments for the above statements....in the short term. But we are being sold a bill of goods that says this plane is going to be a dominant platform through the 2050s. I simply do not believe, as firmly as you do, that the enemy won't be able to overcome the difficulties you state through technology of their own in the 30s, 40s and 50s. While it's true we can continue to upgrade, it is also true that many of our most advanced programs have been penetrated by the Chinese and others. This fact that goes a long ways towards off-setting the advantages we should enjoy. This is further compounded by the number of foreign customers for the F-35. To assume none of them will have individuals or systems compromised is naive. In short, I simply believe at some point, the F-35 will be forced into a dogfight in which the skill of the pilot and maneuverability of the plane will be the deciding factors. I do hope it's good enough to get the job done in that arena. I'm sure LM and DOD will give us news releases and test pilot interviews in the next year or so saying the plane will fly circles around the teen-series fighters. They have too much invested so say otherwise, whether it's true or not.
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alloycowboy
PostPosted: Jul 30, 2012 - 08:22 PM Reply with quote Back to top
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@redbird....... I think you have been watching to much Top Gun. The fact is that the lethality and turning ability of modern missiles is such that even considering getting in to a turning fight with another aircraft may be suicidal for a modern fighter pilot.
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SpudmanWP
PostPosted: Jul 30, 2012 - 09:13 PM Reply with quote Back to top
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With the introduction of HOBS & LOAL missiles and systems like EODAS, the days of "I can't get tone" are almost gone.

It's a lot easier, faster, and cheaper to develop a high performance missile than to develop a fighter to employ older missiles more effectively.

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wrightwing
PostPosted: Jul 30, 2012 - 09:30 PM Reply with quote Back to top
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redbird87 wrote:

Certainly I have no arguments for the above statements....in the short term. But we are being sold a bill of goods that says this plane is going to be a dominant platform through the 2050s. I simply do not believe, as firmly as you do, that the enemy won't be able to overcome the difficulties you state through technology of their own in the 30s, 40s and 50s.


By the 2050s, not only will any F-35s still flying be significantly upgraded(think F-16A versus F-16C Block 60/70), but we will have the next generation aircraft in service too. The first thing a foe has to do is reach parity with what we currently have, much less considering achieving superiority over what we will have, by then.

Quote:

While it's true we can continue to upgrade, it is also true that many of our most advanced programs have been penetrated by the Chinese and others.

Most of those penetrations weren't even at the secret level, much less the top secret level. You're not going to leapfrog anyone stealing FOUO level information.
Quote:

This is further compounded by the number of foreign customers for the F-35. To assume none of them will have individuals or systems compromised is naive.


By that, you mean the foreign customers that currently operate advanced 4th Gen US aircraft? Why do you suppose that the leaks would be significantly more for the F-35, than any other system that the currently operate? As for reverse engineering, you may want to read the stories about the UK, Turkey, Israel, etc... having concerns about the tamper proof avionic systems, and source codes.

Quote:

In short, I simply believe at some point, the F-35 will be forced into a dogfight in which the skill of the pilot and maneuverability of the plane will be the deciding factors.

If the F-35 is forced to the merge, the better systems/weapons will play a huge role in determining the outcome. You do understand that the F-35 can engage targets within a 360 degree sphere. Eventually other planes will have this capability, but it's currently unique. This means that it isn't necessary for the F-35 to be facing an opponent to engage. Now, factor in agility which surpasses the planes it replaces, reduced signature, etc...
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redbird87
PostPosted: Jul 31, 2012 - 03:40 AM Reply with quote Back to top
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alloycowboy wrote:
@redbird....... I think you have been watching to much Top Gun. The fact is that the lethality and turning ability of modern missiles is such that even considering getting in to a turning fight with another aircraft may be suicidal for a modern fighter pilot.


Sorry to disappoint you, I think that is one of the worst movies ever made.
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redbird87
PostPosted: Jul 31, 2012 - 03:42 AM Reply with quote Back to top
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SpudmanWP wrote:
With the introduction of HOBS & LOAL missiles and systems like EODAS, the days of "I can't get tone" are almost gone.

It's a lot easier, faster, and cheaper to develop a high performance missile than to develop a fighter to employ older missiles more effectively.


A fact that will work against the F-35, as well as for it. The concern isn't that this will be a very capable aircraft when it reaches IOC. The concern is that we've spent so very much and made such a long-term commitment on technology that is expensive to maintain and will be largely obsolete 15 years later. Time will tell.
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SpudmanWP
PostPosted: Jul 31, 2012 - 03:56 AM Reply with quote Back to top
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How does this work against the F-35? It already has EODAS and is due to get DIRCM. The ROW has to play catch-up.

If the enemy creates a great missile, it still has to detect the F-35 in order to use it. But, since we are talking WVR, that is pretty much a given; as long as it's not a nighttime engagement, or in the clouds, or coming in from the sun, etc

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jeffb
PostPosted: Jul 31, 2012 - 04:23 AM Reply with quote Back to top
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wrightwing wrote:
jeffb wrote:
Well it isn’t you know. Remember the quick look review and all that stuff about buffeting and transonic roll off?
All twin tail fighters have buffeting, etc.. issues.
Yeah, but you were trying to claim that the F-35 is agile, plainly it isn’t.

wrightwing wrote:
Quote:
It’s inability to be flown at AOA greater than 20 degrees? No?

Inability? Show me a source for that. You're using the tired old argument- it hasn't done that yet, therefore it can't do that.
The flight envelope has not been cleared beyond 20 degrees, thus, it cannot currently be flown at AOA greater than 20 degrees. It’s simple stuff Wrightwing I don’t get why you can’t see it. Your dismissal of my objection to your claim being based on “It hasn’t been done yet, therefore it can’t be done” is only half true and would be better characterised by the phrase “It hasn’t been done yet, therefore there is no evidence that it can be done” or more colloquially as “don’t count your chickens before they hatch”.

wrightwing wrote:
Quote:
Well there’s your problem then, you’re ignoring the facts and instead just accepting what the marketing brochure says as fact.
I feel comfortable excepting what pilots who've flown Raptors, Super Hornets, Vipers, etc.. have to say, rather than relying on brochures, or aviation lobbyists from Australia.
Me too but if a Raptor pilot says that the F-35 can (can mind you not will) pull 20 Gs backwards while unloading its entire ordinance load would you believe him?

wrightwing wrote:
Quote:
Nope, they don’t need a smaller RCS they just need a way to make the F-35s smaller RCS not matter, same thing for avionics. You keep assuming they have to do what you’re doing better. They don’t.
The F-35 will always enjoy advantages over an aircraft with a larger RCS. The latter can always upgrade avionics, but not to the extent to completely offset its disadvantages. You're also assuming that the F-35 is in stasis, while all other opponents are continually upgrading.
I think you missed my point. The F-35 will enjoy an advantage over other aircraft as long as those other aircraft use what are effectively legacy x-band radars to try to detect and track him. Obviously the opposition is rapidly addressing this issue as evidenced by the innovation in newer SAM radars and bolt on solutions for existing combat aircraft.

wrightwing wrote:
jeffb wrote:
Gets better after what? The grey points on the graph are tagged "coverage". You'll notice that they are interspersed, seemingly randomly, with the moderate and severe buffet markers and that one is frequently right next to the other, that is, normal flight to severe buffet without the pilot doing anything particularly special. Remember that this was largely unexpected in this particular flight regime and that the real testing begins in the next few months with the results probably not available till 2014 (when's IOC again?).
The full envelope hasn't been explored yet. These charts don't represent what hasn't been tested yet.
Exactly what I was pointing out above.

wrightwing wrote:
Quote:

Voice command sounds like fun:
PILOT: T.a.a.a.r.r.r.r.g.g.g.e.e.e.t.t.t...t.t.t.h.h.h.r.r.r.e.e.e.e.e...f.f.f.i.i.i.r.r.e.e.e.!.!
F-35: Voice command not recognized. Say again.
PILOT: T.a.a.a.r.r.r.r.g.g.g.e.e.e.t.t.t...t.t.t.h.h.h.r.r.r.e.e.e.e.e...f.f.f.i.i.i.r.r.e.e.e.!.!
F-35: Voice command not recognized. Say again.
CLIPPY:(ping)Hi, I'm clippy, you appear to be trying to...launch a short range air to air weapon. Can I help?
PILOT: A.a.a.a.a.a.ah.h.h....e.e.j.j.j.e.e.c.c.t.t.!.!...e.e.e.j.j.j.e.e.e.c.c.c.t.t.!.!
Laughing
Presumably, if the pilot is pulling high Gs, then his hand is on the control stick(which includes the trigger, and toggle for target selection). The beauty of spherical engagement is that high G turns aren't necessary to engage a target. That doesn't mean that they're not available in the event that it becomes necessary to turn hard.
This was just a bit of silliness to illustrate what would happen if you were trying to issue commands while the aircraft is experiencing severe buffeting. Under those conditions it’s questionable if you’d be able to keep your eye on an aircraft, the instruments or anything with the whole plane shaking under you like that. Playing with the HOTOL under those conditions could have interesting results and even voice commands might be iffy as I attempted to illustrate.
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SpudmanWP
PostPosted: Jul 31, 2012 - 05:19 AM Reply with quote Back to top
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Jeff, you were clearly implying, nay, outright saying that the F-35 did not have the ability to go above 20 AoA when the truth is that it has not even tried. It is designed to go 50 AoA, so 20 is not big deal. There is a huge difference between "inability" and "has not yet". If a test pilot today wanted to, he could reach the upper limits of the AoA without anything stopping him, except for his CO who would chew him a new ******* for not sticking to the testpoints. Smile

If you look at the chart, the section on severe buffeting is rather small, in AoA and mach numbers.

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jeffb
PostPosted: Jul 31, 2012 - 08:10 AM Reply with quote Back to top
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And it doesn't. My original statement mentioned the F-35s current inability to go beyond 20 degrees AoA, nothing more, nothing less. That is factually correct isn't it?

That said, given the level of buffet exhibited beyond 10 degrees AoA and M0.8 in the (typical) plot of buffeting at given speed and angle of attack I won't be surprised if it gets worse. You can see in the plot above that the pilot has experienced buffeting pretty much as soon as he pulls the stick back at speeds greater than M0.8 and below that speed, as soon as he goes above an AoA of 10 degrees. It gets severe at the point where those two parameters meet but basically anywhere he goes on that plot he's getting buffeted about. And the guy isn't stupid, he doesn't push beyond those points. There are no data points at M1.0 and 20 degrees you'll notice. He felt around at M0.8 and then slowed down again when he couldn't get around the buffeting.
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SpudmanWP
PostPosted: Jul 31, 2012 - 08:54 AM Reply with quote Back to top
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No it is not factually correct. The term "inability" means that it is not able to, which does not apply to the F-35. If it was not able to go above 20 then there would be no point to all high AoA tests that are about to begin. When it does so (without any changes to the current config btw), what are you going to say then?

On the issue of what is acceptable buffet and that chart, unless you have the equivalent chart of current fighters, then it is almost impossible to put a value to how it affects operations. You also do not know what is causing the buffet and what it would take to alleviate it.

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Last edited by SpudmanWP on Jul 31, 2012 - 10:05 AM; edited 1 time in total
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spazsinbad
PostPosted: Jul 31, 2012 - 09:50 AM Reply with quote Back to top
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Here is an interesting point of view about many topics hinted at (but no one will know anything about the F-35 until it 'goes there' - DACT) about what buffet is in relation to the F-35 performance and whatnot. As SWP hints at - just looking at a chart in isolation does not mean a lot without context; and then the question will be: Is just a chart enough? BFM/DACT will find out. And it will all depend on the rules. The F-22 goes to the merge because the rules of DACT at that time - demand it - and so on. Anyway...

F-22: Journalism vs. Punk Journalism July 30, 2012

http://elementsofpower.blogspot.com.au/ ... alism.html

"Is David Axe a ‘Punk’?"

Dunno but go read to find out!

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wrightwing
PostPosted: Jul 31, 2012 - 03:51 PM Reply with quote Back to top
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jeffb wrote:
Yeah, but you were trying to claim that the F-35 is agile, plainly it isn’t.


Cite your source for this, or stop making the claim. It is contrary to what pilots who've actually flown the plane have said.

Quote:
The flight envelope has not been cleared beyond 20 degrees, thus, it cannot currently be flown at AOA greater than 20 degrees. It’s simple stuff Wrightwing I don’t get why you can’t see it.

The flight envelope wasn't cleared to 9+G or M1.6+ initially either. You've got the greater burden of proof, because you're making the claim of what it won't be able to, without a shred of evidence.

Quote:
Me too but if a Raptor pilot says that the F-35 can (can mind you not will) pull 20 Gs backwards while unloading its entire ordinance load would you believe him?


If you can find such a quote, then I'll join you in scoffing.

Quote:
I think you missed my point. The F-35 will enjoy an advantage over other aircraft as long as those other aircraft use what are effectively legacy x-band radars to try to detect and track him. Obviously the opposition is rapidly addressing this issue as evidenced by the innovation in newer SAM radars and bolt on solutions for existing combat aircraft.


I understand your point. My point is that any foe will be limited by physical laws, in the means that they use to detect the F-35. Against most targets, X band radar is the preferred method of detection. It has the accuracy to detect, and provide fire control to weapons. IR is limited in range, FOV, and by climactic conditions. Other radar frequencies lack accuracy for Fire control guidance, etc.. The F-35 has factored in reductions in visibility against multiple radar frequencies, and IR, and has an extensive ESM suite. What this means is that if a foe is actively searching with X, S, L, etc... radar, then the F-35 will know his location, prior to being detected. Only passive means will prevent a foe from giving his position away, but.....the F-35's sensors will enjoy a first look advantage. This is why an aircraft with a large RCS is always going to be at a disadvantage against one with a small RCS, even with equivalent(or even superior avionics). BLUF- The conventional plane would need sensors that could detect the stealthy plane first, to offset.

Quote:
Exactly what I was pointing out above.


Then how can you possibly claim to know what the F-35 can't do?

Quote:
This was just a bit of silliness to illustrate what would happen if you were trying to issue commands while the aircraft is experiencing severe buffeting. Under those conditions it’s questionable if you’d be able to keep your eye on an aircraft, the instruments or anything with the whole plane shaking under you like that. Playing with the HOTOL under those conditions could have interesting results and even voice commands might be iffy as I attempted to illustrate.


Can you provide one source that would suggest that the level of buffeting is anywhere near the level where the pilot could no longer operate HOTAS, etc...? Pilots are able to operate their systems at 9Gs. Are you insinuating that the buffeting problem is creating even greater physical stresses on the pilot? No pilot has made any remarks that would lead one to believe that buffeting is an exestential issue for the F-35. All that was said, was that under certain conditions there was mild buffeting. There's mild buffeting when the sound barrier is broken for that matter.
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delvo
PostPosted: Jul 31, 2012 - 11:03 PM Reply with quote Back to top
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Where is this "limited to 20° AoA" thing coming from? It's already gone up to 55° as of a few years ago.
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