Thanks Thanks:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 5 of 5
  1. #1
    Join Date
    Jan 2012
    Location
    Northeastern U.S
    Posts
    13

    Default bulkheadaches! Novice working on a Beth

    I'm working on a Beth, about to start attaching things to other things and running into brain freeze. Two questions before I commit a faux pas...anyone have any guidance?


    All bulkheads and knees have an additional 60mm at top allowing -I assume- for the deck camber. To use the deck camber template, I line up the centerline on the template with the one on the bulkhead, and adjust the height until the template intersects with the measured horizontal line, correct?


    All bulkheads are measured as described in the plans (I've repeatedly checked). Each one, measured against the reference line in the side panel, is a perfect fit between the chine line which is the bottom edge of my side panel, and the sheerline at the top. But I thought that the side panels overlapped the bottom panel, so that with the bulkhead in place, the distance from the bottom of the bulkhead to the sheerline should be the same distance as that on the side panel MINUS the thickness of the bottom.I find now that all my bulkheads will, should I attach the side panels so that they are flush with the bottom of the bottom panel, be high by approximately the (9mm) thickness of the bottom panel.


    Did I plane off a few millimeters of plywood below the chine of the side panels that was meant to overlap the bottom panel?


    Hopelessly fuddled: This is one ofthese things where I've been thinking too long about it to be able to make any sense of it, no matter how simple it might be.

  2. # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. #2
    Join Date
    Jul 2005
    Location
    'Delaide, Australia
    Age
    65
    Posts
    8,138

    Default

    Quote Originally Posted by alrotch View Post
    I'm working on a Beth, about to start attaching things to other things and running into brain freeze. Two questions before I commit a faux pas...anyone have any guidance?

    All bulkheads and knees have an additional 60mm at top allowing -I assume- for the deck camber. To use the deck camber template, I line up the centerline on the template with the one on the bulkhead, and adjust the height until the template intersects with the measured horizontal line, correct?
    The deck camber is an arc of a circle. So you don't need to line up the centreline. The plans say to mark the camber only but not to cut the bulkheads, leaving the excess there until the boat is assembled with centrecase, carlins, mast partners, deck supports and centrecase in place.

    Then use the camber templates to mark the bulkheads in situ, they are cut along that line then more adjustment done to bring all the bits down to the curve. This means that deck clamps, coaming, mast supports centrecase top all get trimmed down at the same time This also compensates for the bottom thickness.

    All bulkheads are measured as described in the plans (I've repeatedly checked). Each one, measured against the reference line in the side panel, is a perfect fit between the chine line which is the bottom edge of my side panel, and the sheerline at the top. But I thought that the side panels overlapped the bottom panel, so that with the bulkhead in place, the distance from the bottom of the bulkhead to the sheerline should be the same distance as that on the side panel MINUS the thickness of the bottom.I find now that all my bulkheads will, should I attach the side panels so that they are flush with the bottom of the bottom panel, be high by approximately the (9mm) thickness of the bottom panel.
    Yes ... they are high but when the final deck camber is done with everything in situ it is compensated for.

    Did I plane off a few millimeters of plywood below the chine of the side panels that was meant to overlap the bottom panel?
    No ... keep going. It will work out.

    Hopelessly fuddled: This is one ofthese things where I've been thinking too long about it to be able to make any sense of it, no matter how simple it might be.
    The plans have all these things covered, not specifically but hidden away in the procedure. That if everything is done in order it will work out right.

    One thing to be aware of is that there have been problems with plan versions and I have to look at it once again. There is a replacement sheet to make sure the centreboard will fit in the case. Some have ended up too long fore and aft. So we can double check that before the centreboard is made.

    Welcome to the forum!

    MIK

  4. #3
    Join Date
    Jan 2012
    Location
    Northeastern U.S
    Posts
    13

    Default

    Hi MIK and thanks! I've been here on the forum for awhile mostly lurking since this project has been slow getting off the ground. First, thanks for your detailed answer. A little push was what I really needed. So as far as marking the camber prior to assembly, that's mainly done in order to mask off what doesn't need coating, and therefore can be approximate?

    The other question I have is about notching everything for the deck and chine logs...I was figuring I'd notch for the chine logs pre-assembly since you can't really put the bulkhead in without the notches, then cut those for the deck log after the bulkhead goes in?

    It looks like the board case is the right length: I've checked it against the bulkhead lines already even though I've not glued it up yet. The board was a little long but I was unhappy with the leading edge anyway so I shed no tears as I cut about 5mm off and rounded it over again. Board might be a little thick but I was figuring I'd plane it down a bit before glassing it.

  5. #4
    Join Date
    Jul 2005
    Location
    'Delaide, Australia
    Age
    65
    Posts
    8,138

    Default

    Quote Originally Posted by alrotch View Post
    Hi MIK and thanks! I've been here on the forum for awhile mostly lurking since this project has been slow getting off the ground. First, thanks for your detailed answer. A little push was what I really needed. So as far as marking the camber prior to assembly, that's mainly done in order to mask off what doesn't need coating, and therefore can be approximate?
    Wow, yes exactly the reason. I'd forgotten it but you worked it out!

    The other question I have is about notching everything for the deck and chine logs...I was figuring I'd notch for the chine logs pre-assembly since you can't really put the bulkhead in without the notches, then cut those for the deck log after the bulkhead goes in?
    Now you have a firm grasp of how things move around you can work them out pretty closely - it will save labour if you do that. If you get it a bit wrong you can fix with epoxy. Another way is to do the horizontal cut only. Then the vertical cut can be done easily later holding some stock to get the precise angle and size of the slot. The way in the plan you definitely need to adjust the angle.

    It looks like the board case is the right length: I've checked it against the bulkhead lines already even though I've not glued it up yet. The board was a little long but I was unhappy with the leading edge anyway so I shed no tears as I cut about 5mm off and rounded it over again. Board might be a little thick but I was figuring I'd plane it down a bit before glassing it.
    The board case is right but the centreboard has been too wide in some plan sets because I scaled a whole drawing rather than just part of it. So silly. And it keeps cropping up in plans from time to time.

    MIK

  6. #5
    Join Date
    Oct 2007
    Location
    Poland
    Age
    67
    Posts
    805

    Default

    Hi alrotch,

    Hoping my thread (it was few years ago) can be useful for you - were shared many of photos of my build and there are many of building informations I think:

    https://www.woodworkforums.com/f169/b...anadyjk-96247/

    And if you prefer, feel free to use my all photos from albums:

    Flickr: robhosailor's Photostream

    Building Sailing Canoe Beth -Yuanfen- Photos by robhosailor | Photobucket

    https://plus.google.com/photos/10589...305?banner=pwa

    Enjoy!
    Aloha!
    Robert Hoffman
    http://robhosailor.blogspot.com/


Similar Threads

  1. Stretch the BETH
    By celloist in forum Michael Storer Wooden Boat Plans
    Replies: 6
    Last Post: 15th July 2012, 02:48 AM
  2. There's Something About Beth
    By alrotch in forum Michael Storer Wooden Boat Plans
    Replies: 5
    Last Post: 29th January 2012, 10:05 PM
  3. Another BETH just finished!
    By robhosailor in forum Michael Storer Wooden Boat Plans
    Replies: 4
    Last Post: 4th November 2011, 03:08 AM
  4. Beth with outriggers?
    By keyhavenpotter in forum Michael Storer Wooden Boat Plans
    Replies: 26
    Last Post: 11th June 2010, 04:52 PM
  5. Beth Ireland DVD
    By baxter in forum BANDSAWN BOXES
    Replies: 11
    Last Post: 31st December 2006, 03:42 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •