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Thread: OPV Replacement

  1. #2526
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    Also, they were not fitted to P51 or P52 until after delivery. It is not that unusual, and the turret is an easy fit, on a suitably prepared ship.

    Vessel returned from trials a few hours ago, and someone was ready to catch her arrival.

    Last edited by na grohmití; 16th July 2018 at 23:55.
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  3. #2527
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    [QUOTE=na grohmit�;461216]Also, they were not fitted to P51 or P52 until after delivery. It is not that unusual, and the turret is an easy fit, on a suitably prepared ship.

    To fit a gun complete with appended supply and loading system requires an expert team to transpose data from the Ships reference Gyro through the Decks to the Gun ring flange. The gun has to be installed to an exact plane parallel to the ship's horizontal and be on the 0/180 fore and aft line. The Gun ring is machined to the plane, as found , and the fore and aft line is etched in on the same ring.If it was me this would all be done in dock before leaving the UK. The question therefore is the ship suitably prepared?
    Last edited by ancientmariner; 17th July 2018 at 14:28.

  4. #2528
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    [QUOTE=ancientmariner;461222]
    Quote Originally Posted by na grohmit� View Post
    Also, they were not fitted to P51 or P52 until after delivery. It is not that unusual, and the turret is an easy fit, on a suitably prepared ship.

    To fit a gun complete with appended supply and loading system requires an expert team to transpose data from the Ships reference Gyro through the Decks to the Gun ring flange. The gun has to be installed to an exact plane parallel to the ship's horizontal and be on the 0/180 fore and aft line. The Gun ring is machined to the plane, as found , and the fore and aft line is etched in on the same ring.If it was me this would all be done in dock before leaving the UK. The question therefore is the ship suitably prepared?
    They whip them in and out on a regular basis in the Dockyard so the expertise is there to be used. Once the builders has met the spec with their bit, mounting the turret shouldn't be a problem. We have done it before!
    Time for another break I think......

  5. #2529
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    [QUOTE=hptmurphy;461225]
    Quote Originally Posted by ancientmariner View Post

    They whip them in and out on a regular basis in the Dockyard so the expertise is there to be used. Once the builders has met the spec with their bit, mounting the turret shouldn't be a problem. We have done it before!
    I'm looking forward to trying to get some photo's of it when it happens.

  6. #2530
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    [QUOTE=Sparky42;461230]
    Quote Originally Posted by hptmurphy View Post

    I'm looking forward to trying to get some photo's of it when it happens.
    There used to be photos on the NS facebook page of them doing it in the past (and removing the gun by road to Collins Barracks for Ord to have a proper look at it with their magic sticks.)
    With regards to
    To fit a gun complete with appended supply and loading system
    Unlike other systems the OTO melara is a self contained system. Hoist and gun are one, requiring very little human interaction once primed. Load it up from the RU locker beforehand and then fire away from the bridge. Installation away from build is no different to fitting any other mechanical equipment aboard ship after build. You can be pretty sure that engineers from OTO Melara have been in place already making sure the ship is properly prepared for installation.
    As I said, Roisin and Niamh were both delivered without their main gun, and there was no major issues. In practice, the main gin will go through a wide range of pre firing tests after delivery to make sure it is safe, before being certified. With P61, 62 and 63, this was up to 12 months after commissioning.
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  8. #2531
    The Auld Fella A/TEL's Avatar
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    [QUOTE=na grohmit�;461239]
    Quote Originally Posted by Sparky42 View Post

    There used to be photos on the NS facebook page of them doing it in the past (and removing the gun by road to Collins Barracks for Ord to have a proper look at it with their magic sticks.)
    With regards to
    Unlike other systems the OTO melara is a self contained system. Hoist and gun are one, requiring very little human interaction once primed. Load it up from the RU locker beforehand and then fire away from the bridge. Installation away from build is no different to fitting any other mechanical equipment aboard ship after build. You can be pretty sure that engineers from OTO Melara have been in place already making sure the ship is properly prepared for installation.
    As I said, Roisin and Niamh were both delivered without their main gun, and there was no major issues. In practice, the main gin will go through a wide range of pre firing tests after delivery to make sure it is safe, before being certified. With P61, 62 and 63, this was up to 12 months after commissioning.
    NS has its own Ord section. Nothing goes to Collins Barracks, as Army Ord are not 76mm qualified.

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  10. #2532
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    Why did it go to Collins so? Was a while back and I dont have bookface any more, so I can't find it.
    Or maybe it went from the Dockyard in Cobh and they didn't want to risk taking the ferry.
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  11. #2533
    Commander in Chief hptmurphy's Avatar
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    Pictures are of Roisins gun being remounted after travelling from Haulbowline to Rushbrooke by road... hence the confusion ..I think

    They are in Irish Naval Service Photo Section Page. Quite comprehensive386758_10150443659260944_1578055500_n.jpg386758_10150443659260944_1578055500_n.jpg
    Last edited by hptmurphy; 17th July 2018 at 21:54.
    Time for another break I think......

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  13. #2534
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    Yeah I remember the photos of it going under the bridge under escort, hope the road clearance is still good.

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  15. #2535
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    According to the Navy's Facebook page it's September for Shaw:
    https://www.facebook.com/irishnavalservice/

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