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Thread: Military Aviation News

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    Afghan Air Force receives 4 A-29 Super Tucano.

    US hands over 4 light attack aircraft to MoD


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    Quote Originally Posted by Tango III View Post
    Afghan Air Force receives 4 A-29 Super Tucano.

    US hands over 4 light attack aircraft to MoD
    That's the first time I've seen them with the new cockpit armor add-ons, nice.
    "The early bird gets the worm but the second mouse gets the cheese."

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    Could be that their night vision goggles are lacking minus blue filters in their optics.. or that the wavelength of the filters does not match the wavelength of the cockpit lighting...

  15. #105
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    NVGs weren't big in aviation until the 1980s. It isn't surprising that 1970s cockpit displays on a Tornado cannot be dimmed enough to be compatible with NVGs.

  16. #106
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    The LCD upgrade is recent. We can only wonder how this has passed testing.
    Last edited by TomcatViP; 20th January 2016 at 02:12.

  17. #107
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    Quote Originally Posted by MSphere View Post
    Could be that their night vision goggles are lacking minus blue filters in their optics.. or that the wavelength of the filters does not match the wavelength of the cockpit lighting...
    Could it be that they havent planned and resourced and trained very well? If you think that your frontline aircraft are going to be used in anything other than exercises, then you equip them for that eventuality surely?

  18. #108
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    Quote Originally Posted by djcross View Post
    NVGs weren't big in aviation until the 1980s. It isn't surprising that 1970s cockpit displays on a Tornado cannot be dimmed enough to be compatible with NVGs.
    Really? It wasn't a problem for the RAF 25 years ago, so why should it be a problem for the Luftwaffe now?

    And Luftwaffe (& other) Tornados don't have 1970s displays nowadays. All updated to LCD displays, like the Italians.
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    Quote Originally Posted by swerve View Post
    Really? It wasn't a problem for the RAF 25 years ago, so why should it be a problem for the Luftwaffe now?

    And Luftwaffe (& other) Tornados don't have 1970s displays nowadays. All updated to LCD displays, like the Italians.
    So it seems putting those two sentences together that the new displays are actually worse in regards to NVG use than the old displays from the seventies.

    So whoever did the upgrade simply ignored the need for there use in combination with NVG. Makes sense modern cockpits are full of flat panel displays. Those displays are much larger light sources than the older displays. If you ignored the need to use NVG when designing them then it is not surprising that the new displays render NVG unusable.

  20. #110
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    If so, someone got the specifications for the upgrade spectacularly wrong, & nobody picked it up in testing.
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    NVG compatibility apparently was not an ASSTA 3 requirement so it should come as no surprise the jet can't do what it wasn't asked to do.
    ASSTA 3.1 will add NVG compatibility afaik.
    How can less be more? It's impossible. More is more.
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  22. #112
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    Quote Originally Posted by eagle View Post
    NVG compatibility apparently was not an ASSTA 3 requirement so it should come as no surprise the jet can't do what it wasn't asked to do.
    ASSTA 3.1 will add NVG compatibility afaik.
    So, they seriously send airplane doing some coalition work unable to operate among their coalition peers ?

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    Makes you wonder what the specifications for the Tornado replacement will be!

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    Quote Originally Posted by eagle View Post
    NVG compatibility apparently was not an ASSTA 3 requirement so it should come as no surprise the jet can't do what it wasn't asked to do.
    ASSTA 3.1 will add NVG compatibility afaik.
    I've seen it reported elsewhere that it's not the screens, but LEDs which emit too much IR. The problem's been known about for a while & there's a requirement to replace them, but it's not been co-ordinated with installation of ASSTA 3, so it went ahead with the old LEDs - & there's a temporary fix with some kind of kit (filters to go over the LED lights?), but again, an administrative ****-up re. provision of it.
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    Not necessarily displays, even one or two really bright diodes will force the ABC (Automatic Brightness Control) of your tubes to adjust the gain accordingly causing an ongoing loss of visual acuity for the scene outside the cockpit. NV compatible lighting is not only about reduced brightness, it's primarily about operating wavelength which is then largely filtered out by minus-blue filters.

    Here is what happens if you don't adjust your lighting correctly.. The cockpit lighting modified to Class-B (emission up to 665 nm) as viewed through Class-A objective lens of AN/AVS-9 NVGs and through the correct Class-B objective lens.. Class-B objective lens filters out all light below 665 nm, hence no unfiltered light entering the cathode. However, use of ANVIS-9 with Class-A objectives (625nm limit) allows unfiltered red lighting to enter your tubes..

    Click image for larger version. 

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    Last edited by MSphere; 20th January 2016 at 19:50.

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