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Yama

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Viewing 15 posts - 421 through 435 (of 599 total)
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  • in reply to: Finland Air Force #2172081
    Yama
    Participant

    is the in service date 2024 or the decision? just curious

    Decision 2021 or 22, deliveries 2026-31. However those dates may prove optimistic.

    F-18 service life extension has been ruled out.

    in reply to: Flanker or Fulcrum variant for Iraq in next 15 years? #2172206
    Yama
    Participant

    1) I am not aware of any anti-radiation missile with 300km range. Kh-31 is a ~100km range missile. The practical range of Kh-35 is roughly 130-150km..

    Kh-22P has range of what, 400km?

    😛

    in reply to: Finland Air Force #2172217
    Yama
    Participant

    what would be the point in ToT ?
    its close to service depot tho, savings can be made here

    Hornets were assembled in Finland (it was actually an Air Force requirement), likely won’t be different this time around.
    However Gripen is probably not a strong contender. It lost clearly last time around, and it is obvious that it’s performance is worse than F-35’s. It would have to be much, much cheaper to have a chance, and it probably isn’t.
    They ruled out Hornet lifetime extension, and that means that F-35 is, despite its shortcomings, pretty much the only realistic contender. Decision has to be made in 2022-24 timeframe, and post-F-35 planes won’t be available by that date.

    in reply to: Navies news from around the world -V #2022005
    Yama
    Participant

    I agree that the title is meant to be a snazzy one and may miss some of the intricacies of what a surface combatant should be defined as (I’ve confirmed with the author that he meant surface combatant rather than surface warship), but even if we leave the discussion of what a surface combatant should mean for a later date, I think Jeffrey Lin is far from ignorant in using the surface combatant term to refer to ships like cruisers, destroyers, frigates, corvettes (and battleships), given that it is still a widely accepted definition of the term in many circles.

    Yes. The term “surface combatant” is generally agreed to exclude aircraft carriers which, though warships, are not “combatants”. Of course it is arguable that Hyuga‘s, with their quite extensive destroyer armament and sensors are “combatants” too by this definition: OTOH, already during Cold War, Kirovs were widely agreed to have been largest post-WW2 “surface combatants” despite the existence of much larger aviation cruisers like Kievs etc. So I think that ridiculing the author is bit misdirected…

    in reply to: where is Western air power over Iraq? #2174275
    Yama
    Participant

    I think another pertinent question is: Where are the GCC states in all of this?

    Oh yes I remember! Bombing Shia Houthi rebels in Yemen who want such evil dastardly things as: government accountability, the end to corruption, regular utilities, fair fuel prices, job opportunities for ordinary Yemenis and the end of Western influence!

    Well looking at the Gulf Council states, it’s totally obvious why such list of demands is totally unacceptable to them…can’t really blame them!

    Yama
    Participant

    Yama, as i have explained : any optical systems : whether it is OFS, Private, AAS-42, OLS-35 or EOTS when they want to see target at maximum range they will have to focus their sensor ( zoom) thus have really small FoV, there is no way around it
    Btw, since you asking about it, what is the FoV and scanning rate of OFS, OLS-35, Private, AAS-42 at maximum range?

    Yes, you do want a zooming capability, however as we’re talking about optics which have to fit in very compact space, it invariably means compromises in how they are executed.

    OLS-27 has three FoV’s: 60*10 degrees, 20*5, and 3*3 degrees. Scan rate is said to be 25 degrees per second. I assume OLS-35 is broadly comparable in execution.

    By contrast, typical targeting pod generally has much narrower Field of View to provide better resolution and range: something like 1*1 in narrow FoV and 4*4 in wide-view. In addition they usually have 20-something degree view for navigation. This is why Targeting pods are likened to “watching through soda straw”.
    As said, I haven’t seen EOTS FoVs mentioned anywhere, but I’d guess they are closer to a targeting pod rather than a2a IRST.

    Yama
    Participant

    Do you know what the FoV of EOTS is? It is stated to have an IRST function. Just assumptions on your part.

    Oh, I do know it has an ‘IRST’ function (ie. air-to-air modes) however nowhere I have seen stated just what kind of modes they are, what is its scan rate, how big is the FoV etc. If it is similar to targeting pods, then it’s probably mostly good for visual ID of targets acquired by other means (radar). An effective air-to-air sensor requires much wider FoVs than is common with targeting pods.

    Yama
    Participant

    3) Except it has the range of a targeting pod.

    Sez who? As I understand, EOTS is basically a targeting pod except in fixed, stealthy installation, which probably means it will come with all the normal tradeoffs of a targeting pod – ie. good range & resolution, poor FoV. Nowhere I have seen stated otherwise.

    in reply to: The PAK-FA News, Pics & Debate Thread XXIV #2179725
    Yama
    Participant

    So your pic was dated May 2014 rather than 14th of May?

    No, obviously it’s 5th day of the 14th month.

    in reply to: Russian Navy Thread 2. #2022678
    Yama
    Participant

    The key improvement of VLS over arm launchers, imo, is greater firing rate, and faster response time (which includes the ability to effectively engage targets from 360 degrees without needing the extra one or two seconds for re orienting the arm launcher)

    Single arm launcher is also a complicated piece of machinery prone to breakdowns or damage…

    Russian destroyer design revealed

    Russia developing Shtorm supercarrier

    Weren’t these shown two years ago already – just that the pics of the models were much poorer?
    I like the “Sachsen meets Kirov” destroyer design. Very evil empire-y. However, the massive profile & height of the pagoda radar tower would be a nightmare in storms.
    Wasn’t the design planned for Russian Navy meant to have nuclear propulsion? I echo the sentiment that this is just a private project. However, at least it’s an improvement over 21956.

    in reply to: Eurofighter Typhoon discussion and news 2015 #2181947
    Yama
    Participant

    The thing is, in actual combat operations, the combat system would be almost certainly programmed to ignore events like a ballistic missile launching hundreds of km’s away, because they would only serve to distract the pilot with information which is not relevant to his mission.

    in reply to: Lessons from Textron Scorpion… #2182078
    Yama
    Participant

    Scorpion is all cool and nice, but it is not even remotely comparable to something like F-22 or F-35. I am sure F-22 development process would have been lot quicker if there had existed COTS AESA radar, and supercruising turbofans, and stealth coating and…

    in reply to: Eurofighter Typhoon discussion and news 2015 #2182121
    Yama
    Participant

    A rocket exhaust is not a star.

    Correct. Apparent magnitude of a rocket launch is much greater.

    in reply to: Eurofighter Typhoon discussion and news 2015 #2182213
    Yama
    Participant

    An ICBM exhaust is not a star, and is neither star-like in size nor brightness, unless the warheads go off. The human eye certainly can’t see rocket launches at 800nmi, nor can they see stars in the day time, nor continue to track a rocket even after burn-out based purely on residual heat. Nor do they see infra-red, which explains why their distance detection of hot objects is nowhere near as good.

    Rocket launches from Plesetsk are sometimes clearly visible in Finland, 500-600 kilometres away, if the weather’s good.

    in reply to: The PAK-FA News, Pics & Debate Thread XXIV #2182370
    Yama
    Participant

    If you are using a few custom-build prototypes, hand modifying each and iterating toward your optimal solution, you aren’t having to retool a wide assembly line with every design change.

    5 years after first flight, there were >90 F-35 flying. So every design change results in expensive tooling changes across multiple tool-sets.

    Umm…I don’t think there was anywhere close to 90 F-35’s flying in 2011 (five years after the first flight). LRIP airframes only began to roll off the production lines in 2011. There might have been 90 in various states of completion.

    In fact, F-35 flight test program was painfully slow until the LRIP airframes began to arrive.

Viewing 15 posts - 421 through 435 (of 599 total)