C.C.G.S Norman McLeod Rogers

Started by Seaspray

45 updates 118 likes 151 comments

Griffon Line Drawings

As I am having a little trouble with these frames I am contacting the Canadian Coast Guard to see if I can get line drawing of the hull. I Believe the hull is the same

If your interest I have a link in My Harbour
to my building blog on this model U.S.C.G. Ports & Harbours Boat.
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Reprint off plans

Took the original plan to the printers and got a new sheet 2 copy and two separate flipped frame sections. These plan frames have been checked. Happy with 1-7 frames on model. No 8 was the problem just didn't look right all round. Recut a new frame 8 which was spot on. Correct width overall and height from tip of frame to deck line 80 mm and length of support legs at 55 mm. You can see the plan down at the baseline is a lot clearer where the rear frame lines merge this was a blob on my own printer. Have been doing all measuring from the base line. New frame 8 is 4 mm short in height. The plot thickens See pics
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1 comment
  1. Martin555
    Fleet Admiral
    Seaspray,
    Are you happy with frames 6, 7, 9, 9 1/2, and 10. ?

    If so i would stretch a thin strip of wood across these frames then add or remove wood to/from frame 8.
    Start at the keel and work towards the deck.

    Then do the same thing at deck level taking note as the deck rises to the bow.

    I hope that makes sense.

    Martin555.
    Liked by Seaspray

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Workdeck angles

When I built the frames for the workdeck 6,7,8. I cut them so as the decks was the all the same height all with 55mm led supports. Later I would be adding strips of wood to bring the to correct height. Should have worked to the deck slope on the plan which means the support leg would be gradually longer. I'll put extensions on the current
frames 6,7,8, and see how we go.
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2 comments
  1. Martin555
    Fleet Admiral
    Seaspray,
    Looking at the creases in the paper it looks like you just retrieved it from the bin LOL!!

    As you say the deck can be sorted out later the main thing is to get the hill shape right first.
    By stretching a strip of thin wood across you can easily see what has to be done.

    Martin555.
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  2. Seaspray
    Warrant Officer
    I have at times used a piece of wood around the edge of the frame and they looked good. Just thought ⚡ the deck frames 6,7,8, need to be lowered to the building board as I am building the hull upside down. DOH. Martin555 I do go thro my plans quite fast. However I have one set of untouched plans as a spare working reserve set and one ongoing working plan set. Hence a visit to the printer yesterday.
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Almost there

Checked all the frames happy with them except frame 8 its being sorted see picture. Keel is straight. At the stage where I am considering gluing it up.
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14 comments
  1. Seaspray
    Warrant Officer
    Hi John
    Same plans as mine. The sister is getting the Griffon plans for me from Canada It has the same hull as NMR. As I've seen her in dry dock. I'll leave gluing up the keel and hull till Monday as I need to have a good think to do the job right. Must admit never thought it was big job as everything has to be straight and in line. Ta
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NMR in dock

I am sure this is the NMR in dry dock her colour scheme looks like she is in the Chilean navy now. It was her bow shape I was interested in, and it helped a lot.
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4 comments
  1. RNinMunichBronze
    Fleet Admiral
    Hi Seaspray,
    Here's a little info on her Chilean service, in case you haven't already found it. 😉
    Cheers, Doug 😎
    https://en.wikipedia.org/wiki/Chilean_icebreaker_Almirante_%C3%93scar_Viel
    Lotsa pics here
    https://www.google.com/search?q=Icebreaker+Almirante+%C3%93scar+Viel%5B&client=firefox-b-d&tbm=isch&source=iu&ictx=1&fir=lOaNc-cYh6B4LM%252CRsqP6DcdAhL9LM%252C_&vet=1&usg=AI4_-kTP4RaWE1rSJCqH7YmQPMyzb3EJnA&sa=X&ved=2ahUKEwjpq8LPvdDwAhWKiqQKHTx3DLAQ9QF6BAgXEAE#imgrc=lOaNc-cYh6B4LM
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Stern cheek

After a lot of thinking about it. I think this is best way to get a cheek to go round to and an inch passed frame 1. Have to be careful cutting the cheek in ply the template didn't work. So I replaced the thin strip of ply used earlier and made another template. Which was good and cut the inside line out pic 2. fitted nicely. Pic 3 I trimmed the outside of the ply and looks a good fit. Tried to to continue the curb in the same line to maate up with the obechi stringers from frame 1. Is it time to glue this cheek into position ?
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3 comments
  1. RNinMunichBronze
    Fleet Admiral
    Thanks Martin 😊
    Since then I've finished the hull as I described below and sprayed gloss white.
    Unfortunately my photos of that stage went 'south' when my PC drive crashed a few weeks ago. I'm hoping the pics are still in my camera memory card!

    Go easy with the filler primer spray at this stage; gentle light coats.
    Overdo it with a single heavy (too close/too slow) coat and you may find yourself going back one stage!
    Watching with 'paternal' interest 😉😁
    Cheers, Doug 😎
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Cheeks & Stringers

I've glued the keel to the frames but haven't glued the stern cheek yet. Wondering if a cheek at the bow would be a better idea or balsa ?. Its a tight turn but wetting the obechi would help. The stringer there runs from bow to frame 8 then it stops as the deck has a height difference. Just incase anybody hasn.t sussed it I am doing a kind of step by step of Cervia Tug Build on Mayhem. Right Iam off to the pond for the maiden voyage of my U.S.C.G Ports & Waterway Model. Last minute thought was wondering if I should fit the frame 10 on the bow to the help with the turn of the stringer.
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6 comments
  1. JOHN
    Midshipman
    Hi my mate

    First of all, don't try and over think the job that you are doing. If it were me building this hull; now we have the frames set up on the board and you have the last frame in at the bow; you need to make yourself a flat sanding block. Something along the lines of 2 inches wide 1 inch thick and say, 10 inches long - rounded at one end. Now, you need some double sided tape - I normally use the tape carpet fitters use as its pretty strong stuff. Get yourself some coarse sand paper and stick it onto the block.

    Now, with the block, what you need to do is fair in and even all the frames up. This is where you will find if there are frames that are a bit big, little too small or whatever. Work from the centre frame out to the bow, sanding at 45 degrees to the keel. Same at the stern - work from the middle to the stern. Do not put too much pressure on at the moment as the frames will not support it properly and will begin to vibrate - just gently do it.

    If one or two frames are say 1/16 of an inch out - if its proud sand them - to size - if shallow (small) pack them.

    Next thing to do is add pieces along the centre of the keel either side - normally I would use 5 x 5 mm obechi or birch - glued either side. The reason for this is it gives you extra landing to glue on to when you start planking.

    So, we have completed that

    Now....fit the deck stringers. Now... this is just my way of doing it. Your hull is basically a 3 tier hull, you have a raised aft deck a lower cargo deck and a raised bow.

    Now, the lower cargo deck basically runs from frames 6,7 and just passed 8 and actually just passed frame 5. So, you need to add a stringer both sides of the hull at this level. This stringer I would run the full length of the hull - so - from frame 0 all the way to frame 10.

    Then do the raised rear deck - that stringer I would run from frame 1 to just passed frame 5 - the bow deck I would run the stringer from just before frame 2 to frame 10. Once these have been glued in place then go back and sand & true up all your frames. This is so that actually the frames now will taper to the bow and stern - you should have no sharp edges for the planks to lie on. You will also find that the bow at the keel will be sanded to a point and also frame 10 will be well sanded in and be half the size it is at the moment.

    It is certainly up to yourself though how you start planking your hull.

    Normally when I begin planking the hull I will start 3 or 4 planks from the centre of the keel towards the deck. Whilst they are drying I turn the hull round and plank 3 or 4 planks on the opposite side. This is so that, as the glue and planks dry out we don't get any twisting or distortion. Then I would plank from the deck 3 or 4 planks up over towards the keel either side. I will then alternate from then on.

    Best of luck.

    John
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  2. Seaspray
    Warrant Officer
    Hi John I was wondering how to tackle the framing cheers for that. Thats the way I am going. You know you can read 10 books on model building and get no where. I'll leave the hull for a week and take a rest from it Ta.👍👍
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Keel /Plank Supports

As the pictures show I've glue 5 x 5 mm pieces of obechi between the frames to give further support to the planks closest to the keel. If I get a good day outside I will start sanding the frames to their shape. Making a start with support first pic and all glued up ready for sanding in the second pic.
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2 comments
  1. Seaspray
    Warrant Officer
    This ply is really dry as the sawdust is unreal. Had to do the sanding outside today. More or lees finished sanding the plank supports between the frames. Maybe too enthusiastic as no 10 frame may need packing. Measured it and its different distance from the center line.
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Frame problems

Having a little problem with the frames. I intend to use card to build a new set frames to see where the problem is.
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5 comments
  1. JOHN
    Midshipman
    hi there Scots Martin

    Ok then, I think your problem is - that you are getting your lines mixed up here.

    Here is a suggestion for ya, if you are starting again, with your frames. Begin first of all by drawing a line roughly 3/4 inch above frame 10 at the bow. This is going to represent your building board.

    Now, take all the measurements from your waterline (and no other line). So, if you are measuring say the depth of the keel on say frame 7; measure down on the side profile from the waterline down to the base of the keel. See where that corresponds on your line plan. That is where that frame should end.

    Draw in from deck level up to your building board line; your supports. To check that, measure from your waterline on your frame plans up to the line drawn that represents your building board.

    Do this with every frame.

    I would strongly recommend that you trace each frame and check that tracing against your body plan and also your side profile plan. Also, draw one frame per sheet - so therefore, you can lay the tracing paper sheets on top of one another to see that the frames are corresponding with one another.

    Try not to overthink the job - just go for it :-)

    Hope this helps - and good luck.

    John
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  2. Seaspray
    Warrant Officer
    Thanks John I'll try that I thought I was reading the plan somewhere wrong but just couldn't find what it was. Got all the paper frames cut and glued on to cardboard but will go your way sound better. Ta.
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Frames look better

Originally I went for 30 mm support legs on the rear deck . Measuring the plan a drop of 25 mm for the work deck so I cut and made frames of 55mm (30 + 25 = 55) but it doesn.t work that way DOH Think I found the problem. I measure from the frame 10 on the bow up 30 mm to give a Building Board Line., As John says sorry mate I am metric. Then cut frames templates 10-91/2 Then I drew the BBL across the plan over to the left hand side of the plan which gave me a BBL for all decks on plan. I notice this time all the support legs are the same height when the frame templates are laid in their positions Two things some of the templates are just slightly too big not by much and frame 9 seems just a little big . Dare I cut a new keel and frames
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2 comments
  1. Martin555
    Fleet Admiral
    Maybe you could make a cardboard keel and fit it all together and you would have a better idea of fit.
    If it looks good then you will know what you will have to do next.

    Martin555.
    Liked by Seaspray
  2. Seaspray
    Warrant Officer
    Yes good idea cheers Martin555. I also made the support legs 30 mm from the frame 10 the BBL as I was scuffing my knuckles when I did the sanding on the frames last time. Hope they're not too long and able to take the strain when sanding
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