Thread: Queen Elizabeth Class Aircraft Carriers - News and Discussion

  1. #3031
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    By the way, the F35B trials at sea on USS Wasp were presented by the STOVL prophets as having proven that the B has "no issues" and that the jet blast hazard claims were "nonsense" and that everything actually works perfectly well.

    The reality is a bit different. The F35B jet blast does not hole the deck as someone had (rather extremely) prophetized, but a jet blast issues exists and the trials at sea only confirmed it. A 75 feet danger radius is reported.

    Again, the US Navy DOT&E report for 2011 reports that F35A is presented as being 11% behind schedule, with the B 9% behind schedule and the C 32% AHEAD of schedule, despite the hook issue.

    Regarding the F35B:

    In October 2011, the program successfully conducted initial
    amphibious ship trials with STOVL aircraft in accordance with
    the new, restructured plan for 2011; however, significant work
    and flight tests remain to verify and incorporate modifications
    to STOVL aircraft required to correct known STOVL
    deficiencies and prepare the system for operational use.
    Jet blast from the F-35Bs is expected to produce unsafe forces
    on flight deck personnel up to 75 feet from the short take-off
    line.
    This bit appears in the LHA-6 America part of the report.

    The program halted F-35B durability testing at the end of
    last year when a wing carry-through bulkhead cracked before
    2,000 hours of airframe life. The required airframe lifetime
    is 8,000 hours. Repair of the bulkhead on the test article was
    completed in November 2011, and F-35B durability testing is
    scheduled to restart in January 2012.
    • Following the bulkhead crack in the F-35B test article,
    analysis verified the existence of numerous other
    life‑limited parts on all three variants. The program began
    developing plans to correct these deficiencies in existing
    aircraft by repair/modifications, and designing changes
    to the production process. The most significant of these
    in terms of complexity, aircraft downtime, and difficulty
    of the modification required for existing aircraft is the
    forward wing root rib on the F-35A and F-35B aircraft.
    All production aircraft in the first five lots will need the
    modification before these aircraft reach 1,000 hours.
    • The program also halted F-35A durability testing after the
    F-35B bulkhead crack and restarted it at the end of May 2011.
    The test article restarted testing in November 2011, after
    completing inspections subsequent to accomplishing
    3,000 effective flight hours of testing. During the second
    1,000‑hour block of testing, the wing root rib failed, as
    predicted. The test team is able to continue airframe fatigue
    testing in the near-term, while analysis determines when and
    how to repair the test article.
    • F-35C structural testing completed all structural test
    objectives in August 2011, including planned “drop tests” in
    preparation for simulated carrier trials. Durability testing is
    scheduled to begin in Spring 2012.
    Read the report here: http://www.dote.osd.mil/pub/reports/FY2011/

    Under DoD programs, F35 section.

    The B is still plagued with countless issues, including doors of the propulsion system coming off in flight XD

  2. #3032
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    Good posts Liger, nice to get a heads up about how the Wasp trials went. I hope that the bit about the "C" model being ahead of schedule is true as well.

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    I hope that the bit about the "C" model being ahead of schedule is true as well.
    I think there is no doubt on this: this is official DoD documents, by far the best source we can drink from.
    You must, of course, look at the 32% ahead of schedule data with the awareness that the C is the variant who entered trials last. The other two variants are ahead of the F35C with their programs of development, testing and validation.
    However, they are lagging considerably in terms of test points cleared, while the F35C has cleared 32% more test points than planned, which is very reassuring. Having started later also means that more corrections have been incorporated into the C at build, thanks to discoveries made on the other two variants.
    The C variant has 1002 test flights left to go, and 12.442 test points to clear.
    The A 827 flights and 10257 test points.
    The B 1,437 flights and 15,045 points.

    These values of course change rather frequently when a change proves necessary and needs to be flown and trialed, adding new flights and points to clear to the count, but they are indicative of the current plan.

    The C's big issues come down to the hook (hopefully to be solved in the coming months by the new hook design) and to acceleration which is a bit below the expected value. We must hope that no problems emerge from durability tests: the F35A's wing root life is just 3000-some hours and the F35B main bulkhead survived 2000 hours against a requirement of 8000...

  4. #3034
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    Here are a couple of photos that I took of LB04 yesterday
    sorry about the quality as I took them on my phone
    Attachments Pending Approval Attachments Pending Approval

  5. #3035

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    Well spotted CJ. I enjoyed watching the Launch and Recover training film which underlines the complexity of the machinery and controls to facilitate catapult launches and arrestor wire recoveries. Hopefully that fitted in the QE Class carriers (when we get the final go ahead) will be a good deal less manpower intensive with the catapult controlled from the launch control position and the arrester wires from Flyco or the LCO's position.

  6. #3036
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    Quote Originally Posted by Liger30 View Post
    The C's big issues come down to the hook (hopefully to be solved in the coming months by the new hook design) and to acceleration which is a bit below the expected value. We must hope that no problems emerge from durability tests: the F35A's wing root life is just 3000-some hours and the F35B main bulkhead survived 2000 hours against a requirement of 8000...
    That would be our fault, sorry

    [*******#222222]"For the F-35 Lightning II JSF Fokker Landing Gear is system design responsible for the Arresting Hook of the F35 Conventional Take Off and Landing (CTOL) and the Carrier Version (CV). For the reliability of this arresting hook system Fokker needs to do climate testing. One of the parts of the arresting hook system is the Upswing Damper. It is mounted right under the engine of the F-35. This Upswing Damper adsorbs the energy during the landing from the hook."[/COLOR]

  7. #3037
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    Cheers Naval found it by accident whilst looking for other things, I liked the bit where little wings tells the flight deck engineer to stop *****ing lol. Can you imagine that in a RN vid today, you'd probably get sued sideways.

  8. #3038
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    found this vid on youtube showing ops on old ark royal


  9. #3039
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    Good find Danim. For all the discussion over which F35 variant RN should have, I'd be happy to have the Ark's old air group for now! Classy aircraft. And airframe numbers matter-whilst I'd prefer CATOBAR, I'd be happy with a big deck for 24 Dave B's plus helos.

  10. #3040

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    Should we find out about pr12 on tuesday ?

  11. #3041
    Senior Member SDL's Avatar
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    The Times are going to have a story on their front page tomorrow about military Chiefs wanting a retreat over the Jets.... Can't read the text on the Sky News Twitter image of the front page to work out what they mean exactly.....

  12. #3042
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    This may help...

    [*******#000000][FONT=Times New Roman]It is understood that the Chief of Defence Materiel (CDM), the Defence Equipment and Support (DE&S) department and DCDS CAP AVM Hillier,[/FONT][/COLOR][*******#000000][FONT=Times New Roman] have now tried to persuade the Secretary of State to change course once again by reverting to the much less capable F-35B STOVL aircraft
    [/FONT][/COLOR][*******#000000][FONT=Georgia]
    Angled Deck’ or ‘Ramp’ for our Queen Elizabeth class Carriers.

    [/FONT][/COLOR]http://www.phoenixthinktank.org/2012...arriers/#_ftn4

  13. #3043
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    SDL, basically it says we are going to try to go back to the F-35B, once again quoting the 1.8 billion

  14. #3044
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    Cheaper over better then?

  15. #3045
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    It sounds more like someone has feed Cameron a lot of crap about the F-35C, it says things like "Cameron is due to be presented with what officials believe is an over whelming case for the switch back to the B"

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