F-35 Joint Strike Fighter News, Videos and pics Thread

[A Bar Brother]

Active cancellation when it works is no doubt useful and so is cloaking used by the Klingons. I think this is more of a 6th gen application than what can be achieved with existing technology.

Cloaking is possible as was demonstrated by the British in 2006.

And active cancellation isn't 6th gen technology. It is very much 5th gen technology.

The difference is as simple as funding and timeframe of introduction. The F-35 is expected to get DIRCM technology in the Block 5 upgrade, that's sometime around 2023-25 since Block 4 is set for 2021. The PAKFA has been flying with DIRCM since 2012. So any later 4.5th gen and 5th gen project which claims to have full spectrum ECM is a candidate to have active cancellation technology.

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Radar stealth technology can be divided into passive and active techniques. Although passive methods have been traditionally used, the availability of high-speed microelectronic devices, phased-array antenna techniques, and computer processing have made active methods more feasible and practical. An active stealth system can adapt to almost any object that must be protected, such as a power plant or aircraft, and the technology can be retrofit to an existing electronics platform, with lower power consumption and other advantages compared to passive approaches.1

You can make the B-52 have a lower RCS than the F-22 with active technologies.

Since you brought up something about real time calculations and time delays, there is an answer to that too.

Because a great deal of processing and calculation power is needed to determine the radar cancellation wave, it is difficult to achieve real-time calculations without pipeline delays. For this reason, an offline calculation approach is used to establish a target RCS database. The main RCS prediction method is based on the approximation for obtaining a complex target RCS; the error between the predicted value and the actual RCS value can be minimized within a few decibels.6 Approximate solutions to a target’s RCS can be found in a number of ways, including by geometric optics, physical optics, geometrical theory of diffraction, equivalent currents, and areal projection/physical optics.

As far as cloaking is concerned, it is actually possible to cloak an aircraft in the RF spectrum in the near future rather than the visible spectrum. In the visible spectrum you need very tiny metamaterials and it is still too early to manufacture at that scale, so it is more a question of human ingenuity rather than the laws of physics. The laws of physics allow cloaking as demonstrated by the team who demonstrated to the world metamaterials with negative refractive index.

Rest assured, by the time we build a starship like the one you refer to, even your clothes could have visible spectrum cloaking technology.

 

[A Bar Brother]

Hey Bar Brother, enjoying to read your stuff, really. Just one thing. And this is a really minor wording one I guess and I don't want to sound like a smartass or so, just for my understanding.

On active stealth:



You mean at the same wavelength as the original signal, just 1/2 Lambda out of phase, right?

Wavelength and lambda are the same. But it is out of phase by 1/2 the original signal's wavelength. Check out the article I posted in #2051.

 

[HMS Astute]

i.e. (i) there are many countries without the F-22 (like Australia) and that is a problem which I talked about many posts ago.

Which country is going to attack Australia?

 

[Air Force Brat]

I think the comments by Hostages is contextually to contrast the role of the F-22/F-35 force structure mix in Air Force doctrine and that is simply air superiority/strike role for the respective assets. Obviously without the F-22, that would create a capability gap in some situations. I think the 2 points made by A Bar is valid and i.e. (i) there are many countries without the F-22 (like Australia) and that is a problem which I talked about many posts ago; and (ii) the F-35 is not designed for air superiority role and may be problematic when faced against more capable fighters. Having said that any outcome is dependent on a range of factors and transient performance is only one of them. The F-35 does offer features like situational awareness and stealth which are also important characteristics in any dogfight besides training and tactics that goes into a complex equation.

There is O doubt that Air Marshal Geoff Brown has far more credibility and integrity than his critics, when he states that the F-35 is 10-20 years ahead of PAK-FA, J-20, and J-31, you really aught to have a little more faith, he's telling you the truth! but believe in moonbeams or whatever, fairy-dust might work as well?

 

[Brumby]

Which country is going to attack Australia?

Scenario planning is part of the military establishment. The Pentagon is known to have attack scenarios planning from zombies, aliens and the UK.
Some of the countries around Australia are Flanker operators and so future extensions to PakFa is very real. I would place a bigger bet on a F22 against a PakFa as opposed to a F35.
The issue is not about who would attack Australia.

 

[TerraN_EmpirE]

The Pentagon is known to have attack scenarios planning from zombies, aliens and the UK.

In there defence... The Zombie scenario was always intended as a war game based around the threat of a pandemic not a literal Zombie out break. Aliens well these is life out there somewhere. and the UK well... err we also did one against the Israel. The only one I can think of against the UK were run in the 1930's but were primarily gaming to learn how to fight carrier vs carrier.

 

[HMS Astute]

Scenario planning is part of the military establishment. The Pentagon is known to have attack scenarios planning from zombies, aliens and the UK.
Some of the countries around Australia are Flanker operators and so future extensions to PakFa is very real. I would place a bigger bet on a F22 against a PakFa as opposed to a F35.
The issue is not about who would attack Australia.

Your aircraft are useless in total war between world powers.

I'd rather take 1x SSBN fully packed with Trident D5 over these fancy F22, PakFa, F35, 6th, 7th gens aircraft.

 

[Brumby]

And active cancellation isn't 6th gen technology. It is very much 5th gen technology.

The difference is as simple as funding and timeframe of introduction. The F-35 is expected to get DIRCM technology in the Block 5 upgrade, that's sometime around 2023-25 since Block 4 is set for 2021. The PAKFA has been flying with DIRCM since 2012. So any later 4.5th gen and 5th gen project which claims to have full spectrum ECM is a candidate to have active cancellation technology.

I am mindful that this is a F-35 thread and I have probably gone past injury time but I will say two things in closing. Firstly, active stealth is promising in my view but only when and if it works as intended but I think the timeline is probably further out and throwing money at it is not the primer but rather the maturity in technology is the enabler. I envisaged that an established IADS would present significant hurdles in the form of continuous waves from a variety of sensors. Mitigating one band is very different from saturation across multiple spectrum and aspects. Secondly, active cancellation works best when the aircraft itself is already LO or VLO. In other words it is meant to augment passive stealth rather than replace.

 

[Air Force Brat]

Scenario planning is part of the military establishment. The Pentagon is known to have attack scenarios planning from zombies, aliens and the UK.
Some of the countries around Australia are Flanker operators and so future extensions to PakFa is very real. I would place a bigger bet on a F22 against a PakFa as opposed to a F35.
The issue is not about who would attack Australia.

As well you should, but don't count our little ThunderHoggeII out against Su-35, Typhoon, PAK-FA, or J-20, I'm still gonna put my money on the F-35, and if the good Air Marshall makes such a statement in public, there is ample reason to believe he is telling the truth, or you can stay up late at night and worry. Another thing that you and I both realize, is that its all for one, and one for all, those same 184 Raptors are icing on your cake as well bruda, that's what the Pacific Pivot is all about.

 

[Air Force Brat]

Your aircraft are useless in total war between world powers.

I'd rather take 1x SSBN fully packed with Trident D5 over these fancy F22, PakFa, F35, 6th, 7th gens aircraft.

Nah! a boomer only has 1 trick Jr., that's to hide and rain hell on bad people! My ThunderHoggeII has lots of tricks in her little book, I can make you do a lot of thinking before you do something really stupid, I can show you a lot of pain before its too late, and to be honest a nuke boat is the last place I'd want to be in a real Krap-storm, its cold and lonely at the bottom of the sea, and if you must go nuke, at least go SeaWolf!


actually the Astute and the Virginia's are both lots of fun as well???