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

Discussion in 'World Armed Forces' started by Jeff Head, Dec 1, 2011.

  1. Jura
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    Jura General

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    ... am still interested in a reaction to what I asked
    Today at 7:40 AM
     
  2. gelgoog
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    gelgoog Senior Member
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    Extrapolation?
    https://www.aviationtoday.com/2018/09/27/harris-lm-icp/

     
  3. Brumby
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    In my view your question was rather pointless and why I did not address it initially. Since you are insisting, I would be direct.

    Whether it is trillion or billion of flops is irrelevant to me. It has no perspective regardless of the answer. It is a rather myopic view of a subject driven by ignorance of a technical subject we can hardly claim to understand. The source of the F-35 EW capabilities is not because its GPU can handle billions or trillions of calculations. It is a sum of its different sensors and its fusion supported by a databus architecture (Mil-Std-1394) processed by dedicated FPGAs, signal processors and directed by the millions of line of codes. All the leading edge stuff cost money and time and why it ended up with a $60 plus billion development budget and nine years behind schedule. Leading edge capabilities don't come cheap. If you want development on the cheap go to Russia. There is general 2 of 3 rule in acquisition. Fast, cheap and good. Pick any of two. If it is fast and cheap it is not good. if it is cheap and good it is not fast. If it is fast and good it is not cheap. In other words, you get what you pay for.

    The F-35 basically went for a completely new leading edge bus architecture because sensor fusion requires high data throughput and nil latency in data exchange. Mil-Std-1553 just can't deliver that. High end development require tons of money.

    upload_2019-5-16_10-35-10.png


    There are a bunch of things to consider ; deterministic behavior, weight, power, volume, latency, topology robustness, software impact, hardware development risk, Failure Modes and Effects Analysis (FMEA) risk assessment, tech refresh path, both non-recurring and re-occurring costs in any design. It is just not a case of calculations per sec.

    If you are claiming how capable your avionics and sensors are and my first question would be what is your avionic databus? It is not how many trillions of calculations your GPU can perform. The fact is the SU-35 is still using Mil-Std-1553 and the J-10 is using ARINC 429 speak for itself.

    upload_2019-5-16_10-40-21.png
     
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  4. Jura
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    Jura General

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    ... while to me it was relevant to see if that author might a charlatan
    Yesterday at 2:18 AM
     
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  5. Brumby
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    Bro, I think you need to give people some slack until proven otherwise. This is just a hobby to pass time.

    There isn't any thing new that the author said in the article that we do not know. The EW features of the F-35 is probably the most guarded among its capabilities. The most interesting in my view is its EA capability.
    Block 4 EW enhancements
    upload_2019-5-16_20-53-21.png
     
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  6. Jura
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    Jura General

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    OK so the author Yesterday at 2:18 AM didn't know an actual CPU speed
     
  7. TerraN_EmpirE
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    TerraN_EmpirE Tyrant King

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    Okay
    warning the following is a report by the Heritage Foundation a conservative American think tank and may contain views and opinions likely to conflict with the readers. Readers are recommended to leave but hurt at the door and read the report for its factual content and not the political viewpoint of the page or foundation Butthurt discretion is advised.

    Now disclaimer out of the way, the Heritage Foundation released a report on the F35A
    https://www.heritage.org/defense/re...nd-lethal-multi-role-weapons-system-the-world
    Now part of that report is based on polling pilots of the machine, including comparisons of experienced pilots to there previous machines. As such comparisons are made in a number of fields comparing the F35A to F15E,F15C,F16C,A10 and a former Raptor driver. Also polled were new pilots who came right into Lightning with no real previous fighter experience.
     
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  8. Brumby
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    I compared the results from am earlier report dated August 4,2016 against this report dated May 14. 2019. The sample size are almost similar 31 vs 30 and the results as well.

    upload_2019-5-19_12-51-58.png
    Report dated May 14, 2019 (overall sample size 30)
    upload_2019-5-19_12-52-39.png
    Report dated August 8, 2016 (overall sample size 31)

    I thought the result is rather unexpected as I was expecting the later report to reflect probably a better assessment as it would reflect a flight envelope lifted 3F experience.

    In the latest report at least we have a description of the F-35 geolocation capability.
    I was speculating (wrongly) that the geolocation capability was more advanced by just relying on a single signal emission but geolocated via the integration of the distributed sensors on board the plane.
     
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  9. Jura
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    Jura General

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    yeah the same author (John Venable) as in Mar 30, 2017
     
  10. Jura
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    Jura General

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    it's past the edit time, anyway, looked into that report and feel an Emperor-is-naked moment is coming for the F-35

    by the way "great" methodology for describing performance: to interview your guys, LOL!
     
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