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SpudmanWP

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Viewing 15 posts - 2,176 through 2,190 (of 4,849 total)
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  • in reply to: F-35 News, Multimedia & Discussion thread (2) #2245171
    SpudmanWP
    Participant

    Mmm… LM being rather unopen about the problem: bulkhead cracks found in September 2013.

    http://www.defense-aerospace.com/article-view/release/151788/cracks-have-stopped-f_35b-tests-since-september.html

    Edit How many aircraft that are already built, are currently being built are affected?

    The F-35B is already into it’s 2nd lifetime of ground testing. This is why they are not worried about current flight ops as any bulkheads that need redesign/patch/fix will be addressed during a normal Block upgrade.

    http://www.businessweek.com/news/2013-10-10/ground-testing-uncovers-minor-cracks-in-marines-f-35-bulkheads

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2245524
    SpudmanWP
    Participant

    Spud – If there was anything in that post that actually responded to what I said AND was factual (eg “They are getting Rover in Block 4” – nothing in Block 4 is anywhere near finalized,

    Sorry, “planned” for Blk4. Better?

    and “more and better sensors, better datalinks” – don’t make me laugh)

    More = EODAS and internal FLIR/IRST
    Better = ESM, APG-81, MADL, EOTS

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2245588
    SpudmanWP
    Participant

    1-Offensive Counter Air/Sweep. Possible advantage to stealth provided that the weapons and RoE permit you to take advantage of any difference in detection/tracking range. On the other hand, JAS 39E has Meteor and better supersonic performance. (I can’t see how you would judge that JAS 39E “can’t do” this mission.) It’s also relevant that USAF does not regard the F-35 as an OCA platform (see Gen. Hostage’s recent comments.)

    ”Possible” advantage to stealth?? Have you even paid attention to the F-22 based Red Flag/ Northern Edge engagements?

    Btw, OCA is an official capability of the F-35 and was announced as part of the Capability set at USMC IOC at Blk 2B.

    Marine Corps F-35B IOC shall be declared when the first operational squadron is
    equipped with 10-16 aircraft, and US Marines are trained, manned, and equipped to conduct
    CAS, Offensive and Defensive Counter Air, Air Interdiction, Assault Support Escort, and
    Armed Reconnaissance in concert with Marine Air Ground Task Force resources and
    capabilities.

    2-Defensive Counter Air/Cruise Missile Defence. Stealth irrelevant. Advantage JAS 39E.

    Let’s see… More & better sensors, better datalinks, and more missiles carried = Advantage F-35 (notice I did not say stealth).

    5-Close Air Support. F-35 Block 3F can’t do this because it lacks competitive EO/IR (EOTS has limited field of regard, no HDTV) and Rover compatibility. Fixing issue means adding a pod and destroying stealth.

    EOTS has a better FOR than a SniperXR to the rear and can see from the horizon to the horizon on the sides and front. What more do you need? It also has a higher zoom that SniperXR.

    Btw, they have been doing CAS for DECADES with Rover so that is not a showstopper for CAS. They are getting Rover in Blk4.

    6-Non-Traditional Intelligence, Surveillance, Reconnaissance. Block 3F has no capability, lacking suitable datalinks and sensors (HDTV/LOROP &c) and again, F-35 would need a pod.

    Let’s look at the capabilities again… ESM 2nd to only teh F-22, High-Def SAR, EODAS, HMDS, MADL, SatComm, all stations prewired for NGJ, etc = Advantage F-35.

    You seemed to completely ignore LO and how it will affect the battelspace, ignore that anywhere the F-35 requires a pod, so does the Gripen, and that there are many features inherent to the F-35 that will require either a pod or supporting aircraft for the Gripen.

    in reply to: Military Aviation News-2014 #2245684
    SpudmanWP
    Participant

    In the nose of the centerline-mounted fuel drop-tank?

    Really? That’s an awfully expensive disposable item!

    [ATTACH=CONFIG]225711[/ATTACH]

    [ATTACH=CONFIG]225712[/ATTACH]

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2246134
    SpudmanWP
    Participant

    From Dassault’s own page”

    http://www.dassault-aviation.com/en/defense/rafale/the-sheer-power-of-multisensor-data-fusion/

    1 – “Multi-sensor data fusion”

    Implementation of the “multi-sensor data fusion” into the RAFALE translates into accurate, reliable and strong tracks, uncluttered displays, reduced pilot workload, quicker pilot response, and eventually into increased situational awareness.

    It is a full automated process carried out in three steps:

    Establishing consolidated track files and refining primary information provided by the sensors,

    Overcoming individual sensor limitations related to wavelength / frequency, field of regard, angular and distance resolution, etc, by sharing track information received from all the sensors,

    Assessing the confidence level of consolidated tracks, suppressing redundant track symbols and decluttering the displays.

    Notice that it’s mostly about decluttering tracks? This is inline with the 1st slide I showed.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2246211
    SpudmanWP
    Participant

    but sensor fusion it is not a “revolution” as compared to them

    You are confusing a single de-cluttered display with the sensors working together (what the F-35 program calls “Sensor Fusion”). Take a look at the two slides I provided and you will see that while their end product looks similar, how that data got there and how much the pilot was involved varies greatly.

    I was watching a vid of the F-35 Simulator where the pilot commented that by default the F-35’s display does not tell him which sensor produced the track because it’s a group product, not the result of a single sensor (although it can be).

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2246219
    SpudmanWP
    Participant

    It’s about the components talking to each other to develop a picture and not just combining (de-cluttering) their individual tracks into a single picture.

    Let’s not forget the ability to share that data WITHOUT giving your own position away (directional datalinks) with 24 of your closes friends.

    I found the full-size slides here
    http://www.slideshare.net/robbinlaird/combat-systems-fusion-engine-for-the-f35

    http://i619.photobucket.com/albums/tt271/SpudmanWP/DataFusion_4th_zps02eca0d8.jpg

    http://i619.photobucket.com/albums/tt271/SpudmanWP/DataFusion_zpsbfc0f8e9.jpg

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2246974
    SpudmanWP
    Participant

    It’s not just raw processing power, but what it collects, how it collects it, how it processes it, and how it shares it that sets the F-35 apart.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2247028
    SpudmanWP
    Participant

    One of my favorite quotes from the sworn Australian testimony in March of 2012:

    Air Vice Marshal Osley: And so the strength of the joint strike fighter—and I use this as an example—is that [B]it has the ability to have up to 650 parameters by which it will identify a potential threat out there. Other aircraft, such as the F22 have about a third of that and fourth-generation aircraft have perhaps half a dozen. So if you are in an F18 or in some of the other Soviet aircraft you only have a very limited understanding of what the threat is and being able to identify it at a distance. If we are able to do as we plan with the F35, and that is to have good access to the software and to be able to program it appropriately with mission data, it will have the ability to identify hostile aircraft at quite a considerable distance. Then decisions will be made within the formation, it will play to its strengths and it will defeat it, but not by going within visual range.

    I am sure that the Rafale/Eurofigher are more than the 4th Gen fighter referenced, but I am very impressed by the statement that the F-35 uses 3X the number of techniques that the F-22 does.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2247051
    SpudmanWP
    Participant

    Oh, I guess you better tell that to the French airforce….

    Where do they claim that the AESA radar is connected to and can be used for Spectra data collection and active jamming attacks?

    Besides, that PDF is from 2009 and the first AESA for French service was just delivered in July of 2013, you do the math.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2247095
    SpudmanWP
    Participant

    https://www.thalesgroup.com/sites/default/files/asset/document/Fiche%20Rafale%20Eng.pdf

    Read that again, the AESA antennas that it is talking about are the ESM antennas, not the MUCH larger AESA antenna of the radar unit (and it’s associated transmission & processing power).

    btw, The pilot does not have to “turn his head” to attack a target, just select it in the threat list, confirm pK, and fire.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2247172
    SpudmanWP
    Participant

    http://www.aviationtoday.com/av/military/F-35-Electronic-Warfare-Suite-More-Than-Self-Protection_845.html

    Integration of EW sensors with the F-35’s AN/APG 81 active electronically scanned array (AESA), communications and electro-optical distributed aperture systems puts offensive, defensive, coms and data-gathering sensors at the service of the pilot to process onboard and offboard data. The EW system employs a range of dedicated antennas and shares the AESA antenna for tasks such as electronic support measures or signals collection and analysis. The F-35’s high-gain, electronically steered radar array provides jamming support under the control of the EW system. Because the AESA array provides very directional radio frequency (RF) output, the JSF could target a very small area and selectively jam it, which enhances survivability by reducing electronic emissions.

    Get back to me when someone else can do that.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2247259
    SpudmanWP
    Participant

    And again, Tragedac is primarily a technique for triangulation of known emitters.

    This is NOT what we are talking about.

    We are talking about two pieces of equipment who on their own cannot ID a target (type, track, etc) but through the close cooperation (this is why the fiber connection is required) can provide the appropriate ID/Track.

    This CANNOT be done over Link16 (or even traditional hardware interconnects) due to bandwidth limitations.

    Tragedac does not share “raw data”, but known contacts of in-determinant or inaccurate range.

    The first one, called TRAGEDAC intends to extend passive localisation capabilities of the Rafale using cooperative technics. The idea is to correlate and synchronise OSF and Spectra data from different aircrafts through link 16 to compute passive tracks more accurately (especially the target range as it is currently the most difficult data to assess using passive sensors only)

    http://rafalenews.blogspot.com/2013/06/rafale-developement-tragedac-and-lea.html

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2247322
    SpudmanWP
    Participant

    Still old stuff. Or do you think that… say one F16 shows up as three targets on the Rafale hud? (Emission/rwr + radar reflection + IR)

    In reality sensor fusion in single aircraft and over data links have been around for decades.

    Again, that is BASIC sensor fusion where each piece of equipment delivers a “track” to the central unit and that unit then merges tracks that it thinks are the same thing.

    I am talking about where a piece of equipment (radar or ESM) does not have enough info, on it’s own, to identify or develop it’s own track and only through the very close & combined efforts of both the radar and ESM is a valid ID & track developed.

    The exact way this happens is obviously classified, but that is the basic definition of the feature.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2247382
    SpudmanWP
    Participant

    The whole spectrum of mission specific avionics are supposed to operate as a unified machine on both levels.

    That’s what this “sensor fusion” malarky is all about.

    It’s more complex than that. Fused avionics means that each piece of the puzzle (radar, ESM, IRST, etc) shares it’s final data solution (ie a plane track, a emitter location, etc).

    The F-35’s APG-81 and ESM take this a step further by sharing and cross analyzing the raw data to come up with a unified solution. This allows pieces of a partial solution, that would likely be dismissed on their own, to be recognized for what it is and properly classified.

Viewing 15 posts - 2,176 through 2,190 (of 4,849 total)