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turboshaft

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Viewing 15 posts - 121 through 135 (of 199 total)
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  • in reply to: Antisubmarine Yak-38 #2588908
    turboshaft
    Participant

    The only time I have ever heard about an anti-sub Sea Harrier was in The Hunt for Red October = ForkTailedDevil

    I thought the ASW role was always a core role of Harrier, if nothing else with the WE177 Type C bucket of sunshine ?

    in reply to: Lockheed tests Walrus technology (heh) #2593094
    turboshaft
    Participant

    Its a suprise EADS Airbus hasn’t considered airships for transporting their A380 pieces . It would have saved alot of problems the project is facing now in terms of transport

    As it happens, Airbus did actually look at using the Cargolifter CL160 airship (160 ton payload, a mere one-third of that planned for Walrus), but after looking at Cargolifter’s business plan Airbus decided it would be easier to negotiate 42 bridges on the river Elbe…. Cargolifter subsequently went bust, and its one achievement – Europe’s largest hanger – was converted into a tropical theme park.

    A key problem faced by Cargolifter was the amount of pre-positioning equipment needed to tie-down the airship, which ran counter to the idea of getting heavy loads (mainly industrial heavy equipment, generators, etc.) to less accessible places. The ATG/HAC/LM design is hoping to avoid this problem by using the air cushion landing pads to ‘suck’ the vehicle onto the ground. Sounds good in practice, but the challenge of counteracting a 500 ton change in buoyancy as seven M1A2s roll off may well necessitate some kind of auxiliary tie-down system.

    in reply to: Finally – the Danish EH101 arrive! #2594160
    turboshaft
    Participant

    Does any know what Mk the Danish EH-101’s are?

    Mk512

    in reply to: Lockheed tests Walrus technology (heh) #2594407
    turboshaft
    Participant

    Another British lost opportunity Advanced Technologies Group went into Administration on 26 July 2005. I’m glad that Lockheed Martin has taken on the concept, the future of heavy lift airships is looking much brighter. It does look a lot like the ATG SkyCat 20

    LockMart is teamed with Hybrid Aircraft Corp. on developing this vehicle. HAC (see HAC) was formed by several of the ex-ATG team, which is why the P-791 looks familiar.

    in reply to: Finally – the Danish EH101 arrive! #2595695
    turboshaft
    Participant

    It was 1 and a half years late.

    Nice photos. The FKO is now reported be seeking financial reparations from AW due to the delivery delay.

    Whenever the EH-101 appears in the press, it gets dubbed as the “Rolls-Royce of the helicopters”

    Agree with the sentiment but I’ve never seen this quote used by the press.

    the EH101 needs 3 to go from Nova Scotia to NFL.

    The EH101’s 3-engine configuration harks back to the original SKR design philosophy, which envisaged long-duration twin-engine cruise operation. Today’s MTBF rates do limit the arguments for 3 vs 2 engines, but then the EH101 was designed 25 years ago. Engine power density has also doubled over that period with the T700 growing from 1500shp to 3000shp, substantially improving the capabilities of twins.

    I have already read that the civilian versions have had speed related vibration issues and main roter gearbox issues which Sikorsky claims are being fixed.

    The North Sea S-92 fleet has experienced several additional glitches not listed – and not yet fixed – but that’s just part of the teething process.

    There’s already a saying in the U.S. industry about the EH101: If airliners were as reliable as the EHE101, one airliner would crash every single day in the U.S. alone.

    Never heard that one either, certainly not in CT or on the Hill.

    And on the commercial scene the EH101 has vanished.

    I hate to think how much that sole Tokyo police aircraft must cost to support. AgustaWestland is talking about a renewed push for the civil market, driven by the forthcoming UK SAR opportunity, but the small size of this market struggles to justify two offerings (Puma & S-92), let alone three; the new competition from AB139 sized vehicles further drives down segment profitability.

    The Canadian government funded the EH101 programme with significant amounts of money, before pulling the plug on a huge order

    The EH101 was originally selected for both the MHP and SAR requirements (CH-148 Petrel and CH-149 Chimo) but cancelled by Chretian, who then faced the embarrassment of reselecting the type for SAR. Unfortunately for the new Conservative government we have now come full circle, with AgustaWestland lodging a C$1 billion claim against Canada over the ‘biased’ selection of the H-92 for MHP.

    How many months/years behind schedule is it?

    NFH is now over two years behind schedule.

    The NH90 has not produced any unwelcome suprises yet.

    You need to spend more time in Donnauworth and Marignane :diablo:. Most of the delays have been avionics and systems related, but there’s been at least one mechanical problem which put the brakes on the program.

    At least the swedish Versions of the NH-90 got a higher cabin, as they asked for it

    The HCV variant, as described by Soren-a, is also under consideration by other potential SAR operators.

    NH-90 is in operational service…? In what unit?

    No, not yet. Expect to hear something during ILA 2006.

    NH-90, EH-101, or S-92….ANYTHING would be better for the Marines than the V-22 “Deathtrap”!

    For better or for worse the Corps selected the Osprey, and given the number of MV-22s already built (>70) the program is simply too far along to cancel.

    turboshaft
    Participant

    Oddly enough, a similar ‘combo’ offer was made to the RAF in the mid-1990s for the FTTA (now FSTA) program. Airbus was at one time suggesting an A310/A320 mix, with Boeing looking at a 767/757 offering.

    in reply to: Eurocopter Heavy Lift Helicopter #2603617
    turboshaft
    Participant

    Old news. EC has been publicly talking about a tie-up with SAC on the HLH/FTH since mid-2004. It boils down to whether Europe clings to its very specific (and very challenging) performance/payload requirements, or whether it drops these and ‘accepts’ the CH-53K instead.

    The quoted 2013-14 IOC should not be taken seriously.

    in reply to: Brimstone #1821244
    turboshaft
    Participant

    Still seems weird seeing the Tornado equipped with such a short-range Hellfire-derived weapon. It’s a natural fit for Harrier and Apache, but it brings back the ‘staring down the barrel’ memories of Tornado/JP233. (For the GR4, does it come with additional cockpit flak curtains and a change of underwear ?!)

    Ah, the Wasp. For a couple of years in the early ’80s, I remember 12 (?) round Wasp pods appearing on every NATO aircraft schematic before the program folded. The days of the Fulda gap…

    in reply to: Pump jet propulsor? #2067084
    turboshaft
    Participant

    Adding to the contributions of Gepard and Neptune, pumpjets/Kort nozzles/ducted props exploit the venturi effect to realize higher mass flow and thus thrust. They can also offer a reduction in induced drag, especially when compared to the later-generation multi-blade props.

    in reply to: HMB-1 #2067259
    turboshaft
    Participant

    If interested, ‘Red Star Rogue’ is debunked in this month’s Naval Proceedings (status of the 11 man KGB crew, ‘new’ location, supposed attempt to blame the Chinese for a launch against Pearl Harbor, etc.).

    in reply to: Heavy-duty LCACs! #2068883
    turboshaft
    Participant

    There was a BAA issued for the platform last month. Previously known as LCAC(X), the seabase to shore connector (SSC) has a ‘minimum’ payload of 70t (i.e. one M1), but my understanding is that the objective requirement is that the platform be capable of carrying two M1s (as already stated by Shadow1). The SSC will feature considerably larger engines than the TF40, and my understanding is that the current LCAC propulsion configuration will be retained, i.e. two lift engines and two propulsors.

    The key difference between SSC and LCAC is that the new vehicle is intended to be capable of far longer missions than the LCAC, in support of the Navy’s seabasing aspirations.

    ICD is due to be completed in May 2006, with a design contract due to be awarded in FY10. EIS is 2015 at the latest.

    in reply to: Official Version of KURSK Sub not TRUE #2074286
    turboshaft
    Participant

    Conspiracy theories aside, I thought it was accepted fact that either the Toledo or Memphis docked in Norway for damage repair shortly after the incident. Is this no longer the case ?

    in reply to: USS New Jersey pics and more…. #2076090
    turboshaft
    Participant

    Ali –

    That’s a German 280mm railroad gun, a different beast altogether.

    [Thinks: hmm…an LCS with a 280mm gun…] :diablo:

    There’s no replacement for displacement.

    in reply to: Better CIWS: Palma/Kashtan? AK630? GoalKeeper? or Phalanx? #2077384
    turboshaft
    Participant

    As a sidebar, there’s a short piece in this week’s JDW on the US Army’s program to design a truck-mounted CIWS for battlefield defense (counter-shell/anti-missile). Heart of the system is a Block 1B Phalanx.

    in reply to: EMALS Advantages #2077791
    turboshaft
    Participant

    The Global Security info is pretty comprehensive. Additional EMALS goals include an annual $1M life cycle cost reduction annually per unit and a 29% increase in delivered energy capability.

Viewing 15 posts - 121 through 135 (of 199 total)