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haerdalis

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  • in reply to: CVF Construction #2029437
    haerdalis
    Participant

    F35B to perform rolling landings on CVF

    hybrid shipboard rolling vertical landing (SRVL) technique, potentially to be employed as the primary recovery mode for Lockheed Martin F-35B Joint Strike Fighters operating from the Royal Navy’s two Future Aircraft Carriers (CVF).

    An SRVL involves a short take-off and vertical landing aircraft performing a “running landing” on to the carrier flightdeck, using air speed to provide wingborne lift to complement engine thrust. The touchdown position on an axial flightdeck is similar to that of a conventional carrier – about 45m (150ft) from the stern, but no arrestor gear is required, as the aircraft uses its brakes to come to a stop within a distance of 90-150m. The technique could allow an F-35B to recover with an extra 907kg (2,000lb) of weapons and fuel, or reduce propulsion system stress and increase engine life.

    Source

    This is smart work by the UK MoD.

    in reply to: F-35 news thread II #2373041
    haerdalis
    Participant

    hybrid shipboard rolling vertical landing (SRVL) technique, potentially to be employed as the primary recovery mode for Lockheed Martin F-35B Joint Strike Fighters operating from the Royal Navy’s two Future Aircraft Carriers (CVF).

    An SRVL involves a short take-off and vertical landing aircraft performing a “running landing” on to the carrier flightdeck, using air speed to provide wingborne lift to complement engine thrust. The touchdown position on an axial flightdeck is similar to that of a conventional carrier – about 45m (150ft) from the stern, but no arrestor gear is required, as the aircraft uses its brakes to come to a stop within a distance of 90-150m. The technique could allow an F-35B to recover with an extra 907kg (2,000lb) of weapons and fuel, or reduce propulsion system stress and increase engine life.

    Source

    The article is slightly dated but the operational doctrine is very smart. Rolling landings on a carrier deck without arrestor wires are nice.

    in reply to: Boeing KC-X Victory (Merged) #2373365
    haerdalis
    Participant

    That’s my opinion as well, FWIW. They’re both going to qualify, and it’ll come down to a pure price decision.

    It is good to see that it will strictly remain a fixed-price bid. Lines can’t be blurred. The actual cost of making them is going to be relevant.

    Price-dumping would be unrealistic and not sustainable in the long run. No sane company offers products at a loss. And in this case price dumping will lead to disqualification.

    in reply to: Boeing KC-X Victory (Merged) #2373571
    haerdalis
    Participant

    Relax. If both “fail” a specific criteria ….. both will “pass for now”. And the USAF will ask them to “pass that criteria” before aircraft delivery.

    We are talking about Boeing and Airbus …. do you think there is a better option than the duopoly. Ofcourse not.

    Besides, I think the 372 criteria specified by the USAF were probably already in the RFP issued to both companies. They would be aware of the fact that they need to pass all these criteria even before submitting their bids.

    in reply to: Boeing KC-X Victory (Merged) #2373581
    haerdalis
    Participant

    The final Request for Proposal issued by the Air Force shifted its rating methodology from a combination of criteria-and-subjective analysis to a pass-fail approach. There are 372 criteria that EADS and Boeing have to pass; if any of the the criteria fails, the offering is disqualified.

    This removes the past performance and risk factors …

    Source: In-depth article on inner workings of Round 3

    Boeing is in the position of having to convince the Air Force …….. of the Italian KC-767 wing-pod flutter issues (with a new control surface system for the wings, we are told) and all other systems can be done within the fixed price bid and timelines specified in the RFP.
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    .
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    The same approach is true for the KC-45 systems. Although EADS correctly points out that its airplane is in production and in testing and has transferred fuel on many occasions, it is also equally true the airplane is about 18 months late, it has yet to be delivered and it certainly isn’t operational.

    Parenthetically, the USAF is certainly cognizant that any price offered by EADS that underbids Boeing is going to be subject to Congressional scrutiny. Thus, the Air Force has real, deep incentive to be convinced that no price dumping occurs.

    Summarizing,
    – Price-dumping is out, it will be a RFP-based fixed-price bid
    – Simplistic pass-fail approach is in (not a criteria or subjective approach)
    – USAF likely to use EN’s (Engineering Notification) to clarify technical issues outside the pass-fail approach
    – EADS KC-45 is not operational yet (A330 operations not applicable)
    – Boeing KC-767 is not operational yet (Italian, Japanese 767 not applicable)

    This kind of impersonal/stand-off approach seems to indicate that the decision will be made objectively and speedily.

    in reply to: Littoral warfare #2029623
    haerdalis
    Participant

    Tomahawk (1550miles) is part of the LAW (Land Attack Warfare) doctrine.

    in reply to: Littoral warfare #2029662
    haerdalis
    Participant

    To start with,

    On board a ship:
    – AN/WLD-1 remote minehunting system
    – AN/AQS-20A sonar mine detecting set

    In addition, MH-60R/S helo or a tactical UAV can perfom:
    – airborne surface influence sweep
    – airborne laser mine detection and
    – airborne mine neutralisation

    Is this what you were looking for?

    in reply to: Littoral warfare #2029676
    haerdalis
    Participant

    Inside the US Navy’s next-generation destroyer

    http://i.i.com.com/cnwk.1d/i/tim//2010/08/03/Land_attack_warfare_1_610x427.jpg

    As a result, a ship that can get U.S. missiles close to potential adversaries is high on the Navy’s list of priorities, and the Zumwalt class is designed for just such missions: its stealth capabilities make it ideal for sneaking close to an enemy, at least those that aren’t landlocked.

    The DDG 1000, then, is specially designed to “dominate the littoral environment.” That means, Laliberty explained, that if the ship can get close to shore, it can be the U.S. military’s best weapon, and can be a leader in any expeditionary strike force.

    At the same time, the DDG 1000 is designed to throw off radar that would try to find it in a number of ways, including its composite materials. Another design is its wave-piercing tumblehome–or hull. Most Navy ships have flared hulls, Laliberty said, but the DDG 1000 was meant to be stealthy, and its tumblehome is angled in such a way that, “if you see it on radar,” Laliberty said, “it comes across as a 45-foot trawler. It doesn’t look like a 680-foot warship.”

    As noted above, the DDG 1000 is expected to be deployed in 2015.

    For now, there are three Zumwalts in the pipeline. After the DDG 1000 is deployed, another one will come 18 months later, and then the third 18 months after that. In total, the U.S. government has appropriated $11 billion for the program.

    http://i.i.com.com/cnwk.1d/i/tim//2010/08/03/DDG_2002a_540x349.jpg

    Source

    in reply to: Navies news from around the world -III #2029680
    haerdalis
    Participant

    Inside the US Navy’s next-generation destroyer

    http://i.i.com.com/cnwk.1d/i/tim//2010/08/03/DDG_2002a_540x349.jpg

    At the same time, the DDG 1000 is designed to throw off radar that would try to find it in a number of ways, including its composite materials. Another design is its wave-piercing tumblehome–or hull. Most Navy ships have flared hulls, Laliberty said, but the DDG 1000 was meant to be stealthy, and its tumblehome is angled in such a way that, “if you see it on radar,” Laliberty said, “it comes across as a 45-foot trawler. It doesn’t look like a 680-foot warship.”

    Clearly, the Zumwalt-class destroyers are going to be big. The DDG 1000 will be 610 feet long, compared with 509 feet for the current-generation destroyer. Yet, the Zumwalts will carry a crew of just 148, compared with 382 currently. And that’s largely because of the advanced electronic systems the new boat will feature, allowing the much-smaller crew to get much more out of their ride.

    High-Res Slide Show

    Source

    in reply to: F-35 news thread II #2375058
    haerdalis
    Participant

    Good news for the F136.

    F136 Funding Adopted in House Markup: House defense appropriators voted on Tuesday in favor of providing $450 million to keep the F136 engine program alive next fiscal year, striking another blow to the Pentagon’s push to stop work on this engine.

    😎

    Source

    in reply to: Boeing KC-X Victory (Merged) #2375070
    haerdalis
    Participant

    The U.S. Air Force will not further delay the KC-X contract award date, the service’s top officer promised Aug. 4.

    U.S. Air Force Chief of Staff Gen. Norton Schwartz speaks Aug. 4 to Defense News editors and reporters……

    Earlier this week, several analysts said that the award date would slip past the new year. The Everett (Wash.) Herald quoted one as saying the “entire process” could be delayed to 2012 because of potential protests by the losing bidder.

    Source

    A timely press statement from the top man in the USAF.

    in reply to: European stealth #2375100
    haerdalis
    Participant

    I think too, that UCAV’s are the future for Europe.

    It will be difficult to hide problems like large vertical fin, canards, lack of stealth shape etc …. but you never know. Both Dassault and EADS are capable aircraft designer’s and can spring a surprise or two.

    But nothing is gonna happen in the near future for sure.

    in reply to: Mirage 2000 in 2010 #2375331
    haerdalis
    Participant

    No, I am talking about the new aesa entering LRIP in 2011-12. Trying to compare it to the dash 5 RDY. Since the specs aren’t clear I was hoping glitterr or arthuro could throw some light on this.

    in reply to: Mirage 2000 in 2010 #2375435
    haerdalis
    Participant

    Can the mirage dash 5 be upgraded with the rbe2aesa?

    in reply to: MMRCA News and Discussion IV #2375455
    haerdalis
    Participant

    Does India really envisage the possibility of war with either Pakistan or China (or both!?)

    I thought “conventional wisdom” suggested that when two rational opponents both get nukes the risk of war between the two drops to virtually zero. This assumes of course that both opponents are rational, and that both opponents are capable of “striking back”.

    I would think this is the case for India?

    Or am I wrong?

    The Kargil War

    Loke, The above link will explain everything.

    Point to note is that Pakistan was a unstable dictatorship when it happened and India was a stable democracy.

Viewing 15 posts - 1 through 15 (of 183 total)