Hasler Hatch querries

  • 14 Aug 2011 08:17
    Reply # 675876 on 675368
    David and Robert,

    Thanks for your comments. I am indeed currently planing on making the hatch lid mounting as per PJR fig 3.17. And yes, to close the hatch you must either lower the pramhood or orientate the pramhood so that the opening faces the lid.

    I accept that in 99% of all cases the pramhood will cope just fine and probably even more so in the case of La Chica because the Hasler hatch is well above the deck being mounted on top of the pilothouse and due to her hullform being very resistant to knockdowns and capsize. It still bugs me that the hatch is slow to close but for the time being, I'll go with fig 3.17 as I do not really have the time to play around right now. However it is something that I do plan to come back to one of these days.

    It just bugs me that after all the efforts that I have made to make La Chica as water tight as possible. I have a 500mm diameter hole in my pilothouse that I cannot instantly close. 
  • 14 Aug 2011 00:40
    Reply # 675665 on 675368
    My Hasler hatch has a sliding closing piece built into it, and closing it is the work of a moment - and yet I've never ever felt that closing it quickly would have contributed to my safety or comfort. I think it extremely unlikely that you'll see the really bad sea coming, the one that's going to roll you, in time to do anything about it.
    As Bob says, in all "normal" bad weather, up to and including a moderate knockdown, the pramhood copes well. The hurricane cover is only going to be fitted as a last resort, when you've decided that you can do nothing more on deck, streamed the drogue and retired to your berth.
    I would only use the system shown in PJR fig 13.17 and I can't see that the pramhood needs to be rotated to any particular position to be able to hinge the cover into place. The pramhood needs to be lowered, that's all.  I'd fit a webbing strap such that you can hold the pramhood down flat, where it won't take any harm.
    Galway Blazer was very light and narrow for her length, and thus very susceptible to knockdown and rollover. La Chica is the opposite, with a hullform that is reckoned the best by C A Marchaj for resisting such things. I would think her very unlikely to be rolled through 360, and that's the only time you're going to get hundreds of gallons below. 
    In Tystie's only severe knockdown, to an angle that caused everything in the cockpit to go into the water, only about  3 gallons came below through the open pramhood hatch. The pramhood itself got slightly damaged, through the force of the water hitting it, which is why I say to strap it down when the cover is in place.

    PS Put a clear window in the pramhood, so that you can see to windward without lowering it.
    Last modified: 14 Aug 2011 00:48 | Anonymous member
  • 13 Aug 2011 21:17
    Reply # 675619 on 675368
    Deleted user
    Paul Thompson wrote:Guys,

    I'm about to make the lid for my Hasler hatch and there is one thing that nags me in relation to this hatch ..... to secure or not to secure the lid.... If one attaches the lid to some kind of frame work  as shown in PJR, You can only open or close the hatch when the pramhood opening is facing forward.

    To me this is a draw back because if I am in the hatch and for example see a breaking sea approaching and I want to shut the hatch quickly, I first have to orientate it before I can close it. That would make the operation very slow. If I keep the lid free, I have a stowage problem ( and I like everything to be secured if it is at all possible) but if I can plan that it is stowed near the hatch, I may be able to close the opening faster than if the hatch lid were fixed. Any body who has sailed with them have ideas?

    I do not like the thought of a knockdown or worse a capsize with a 500mm (18inch) diameter hole in my boat. I seem to recall that that is exactly what happened to Bill King and he landed up with a few hundred gallons of water aboard. Not my idea of fun.

    The hurricane hatch on Easy Go is mounted in a fashion similar to Hasler's design. We rarely need to close it as the pram hood can take a tremendous amount of abuse and a little water below is not a serious problem. I can't remember having to close the hatch at sea but being able to close it in port easily is more important.

    With the hatch hinged on deck one can choose to close it when conditions warrant. Orienting the pram hood to make this possible is not a problem. Our hood allows the hatch to be lowered with the hood opening forward or aft.
    Last modified: 13 Aug 2011 21:20 | Deleted user
  • 13 Aug 2011 09:18
    Message # 675368
    Guys,

    I'm about to make the lid for my Hasler hatch and there is one thing that nags me in relation to this hatch ..... to secure or not to secure the lid.... If one attaches the lid to some kind of frame work  as shown in PJR, You can only open or close the hatch when the pramhood opening is facing forward.

    To me this is a draw back because if I am in the hatch and for example see a breaking sea approaching and I want to shut the hatch quickly, I first have to orientate it before I can close it. That would make the operation very slow. If I keep the lid free, I have a stowage problem ( and I like everything to be secured if it is at all possible) but if I can plan that it is stowed near the hatch, I may be able to close the opening faster than if the hatch lid were fixed. Any body who has sailed with them have ideas?

    I do not like the thought of a knockdown or worse a capsize with a 500mm (18inch) diameter hole in my boat. I seem to recall that that is exactly what happened to Bill King and he landed up with a few hundred gallons of water aboard. Not my idea of fun.
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