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Thread: The Cape Henry 21 building thread

  1. #71

    Default Re: The Cape Henry 21 building thread

    On a smaller scale, I build a glen-l 14, which had a similar twist in the garboard.
    I covered it in towels and poured on boiling water.
    I had attached rope to it (I think I screwed some wood on to tie the rope to)
    I tightened it down bit by bit over several days and over a lot of boiling water.
    It worked well.
    I used the same trick for the oak chines.

  2. #72
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    Default Re: The Cape Henry 21 building thread

    Hi guys,
    spiling was not neccessary as Max explained because I use a CNC kit from Alec Jordan, Scotland. That's also why I glued the entire plank and steamed it in place in one stage. The CNC parts can be aligned by an ingenious placement of small holes in the different parts along which you can position a string.
    The planks fit rather good on the stringers. There was some overlap but that had to be planed away anyhow for the landing of the next plank.
    No the Canaries are not my goal. I hope to explore the "Waddenzee" (a sea between the mainland of Holland and a string of isles, whith strong tidal influences) when my CH21 is finished, perhaps sail through the Kieler canal and visit Max

  3. #73
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    Default Re: The Cape Henry 21 building thread

    Hi Dan
    Hans is living in the Netherlands and most likely will use his Henry 21 at the Ijselmeer in the North of Holland.
    Hopefully he will see me at my place one day to have a Cape Henry 21 meeting at the Baltic Sea.

    So far I have 3 ideas for the garboard at the bow I favor most


    Idea 1:
    Using a method Dudley describes in his radius chine builds.
    Two layers of overlapping plywood strips. .
    Some kind of cold molding technique more or less.
    Then glased over as described in idea 2.
    That way only little force will be needed to build the new garboard section.
    It will take a little more time and epoxy, and probably
    a lot of staples to glue on the second layer on in order to prevent gaps between the layers.
    The result will be very nice, fair and strong though .

    Idea 2:
    Using plywood strips 15-20cm wide, the same thickness as the garboard.
    Strips oriented athwartships and edge glued together.
    Then glassed over with two layers 430gr/mē glas weave on each side.
    Fibers in +/- 45° and 90° direction in relation to the strips.
    The result will be a sandwich construction with plywood core instead of foam .
    Quicker to build than idea 1 and probably very strong too due to the glas.
    Maybe there is a danger that the joints will print through after a while.

    Idea 3
    That is a mixture from idea 1 and 2.
    Instead of using the two layers, I will use one layer of plywood with roughly 15mm rabbets on both joining edges .
    The result will be an overlapping glue joint somehow similar to idea one.
    Then glased over too.

    Iīm going to build some test panels soon, so I can compare the 3 ideas to each other
    .
    I planed originally to use 7mm plywood and 4 layers of glass on the outside for the garboard only , so this wonīt be any heavier.
    Not perfect to sail fast, but the weight will be at the right place at least.
    Iīll try to save some weight with lighter wood species at the interior.

    So, what is your opinion about these ideas guys?
    Please share your thoughts with me.

    Max

  4. #74
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    Default Re: The Cape Henry 21 building thread

    Oh hi Hans ;-D

  5. #75
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    Default Re: The Cape Henry 21 building thread

    Go with #1. For me, working with wood, cold-moulding that problem area, would be more satisfying. Diagonal layers of Saplele-ply just seems right for strength and consistent with the rest of the boat construction. It may take a little longer to complete, but it would feel good after all is done.

    Dan

  6. #76
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    Default Re: The Cape Henry 21 building thread

    Ijselmeer is huge and the shoal waters up North look interesting. I hope to see more images from that part of the world. ~Dan.

  7. #77
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    Default Re: The Cape Henry 21 building thread

    "Go with #1. For me, working with wood, cold-moulding that problem area, would be more satisfying. Diagonal layers of Saplele-ply just seems right for strength and consistent with the rest of the boat construction. It may take a little longer to complete, but it would feel good after all is done."

    You are Dan

    More and more I tend do go that way.
    Unfortunately I donīt think that Iīll be abel to work with epoxy again before April in my unheated shed.
    Iīll fill that time with the making of some test panels. If only to satisfy my curiousity how different they behave.
    It wonīt be boring anyway. Long John Silver demands some maintainance and paint too.
    Max

  8. #78
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    Default Re: The Cape Henry 21 building thread

    Moin!
    Sehr schöne Arbeit bisher. Kommst Du in Deinem "Treibhaus" im Winter beim Kleben mit Epoxi temperaturmässig klar? Womit heizt Du?
    Ich werde diesen Thread gespannt weiterverfolgen;-)

    Hi!
    well done! Are you able to do epoxiworks in your greenhouse in the wintertime? What kind of heating you have?
    I will follow this thread....

  9. #79
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    Default Re: The Cape Henry 21 building thread

    Never realised just what a fine entry this hull has....


  10. #80
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    Default Re: The Cape Henry 21 building thread

    Hi Schwattwitt
    No I usually donīt glue with epoxy it it is colder than 10 degres C.
    Much more hassle and poor cure or insane heating costs if i did it all winter in a not well insulated shed.
    So the build is waiting for warmer temperatures.
    In the meantime I prepare Long John Silver inside a heated shop for the next season.

  11. #81
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    Default Re: The Cape Henry 21 building thread

    So i am keen on watching new pics of your building progress in the springtime ;-)
    I have plans of the cape may 25 at home. But unfortunately other things have priority.
    perhabs next year i can start building...

  12. #82
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    Default Re: The Cape Henry 21 building thread

    Another cool dix build in northern Germany.
    Thatīīs nice.
    Your welcome to come over to have a look at the build if you like.

  13. #83
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    Default Re: The Cape Henry 21 building thread

    Yes, but i did not start building yet. First a shed has to be build. May be like yours or like a carport with a tin roof.
    My place is very stormy, so perhaps a more solid shed will be better. I will like to come over in the springtime...
    Ich melde mich im Frühjahr mal bei Dir...
    Bin sehr neugierig ;-)

  14. #84
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    Default Re: The Cape Henry 21 building thread

    Hi guys
    Finally spring has set in with nice temperatures to work again with epoxi.
    Boy it felt like ages I worked the last time in the shed.
    My first task was to replace one more damaged stringer.
    After sawing it of (wasnt easy to put the saw on it...) I rigged a support to get the scarf done with plane.

    IMG_0975 by capitan Max, on Flickbr />
    Fitting and glueing was no trouble.
    To prevent the scarf from unwanted moving when clamping after the epoxi is smeared on I stick in a small nail at each end of the scarf.
    The battens that you can see at the picture is having a 10mm hole for the sticking out nail.

    IMG_0978 by capitan Max, on Flickbr />
    Twisting in the new Stringer with these little helpers for leverage was very easy.
    The lines from a tent came in handy to adjust the tension.

    IMG_0980 by capitan Max, on Flickbr />
    I was ready to start the cold molding.
    First I put in two more temporary thin stringers to get some more meat to fasten the laminations.
    I taped them with yellow tape for easy removal from the epoxi. I will cut them out later on.

    IMG_0987 by capitan Max, on Flickr

  15. #85
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    Default Re: The Cape Henry 21 building thread

    Yesterday was the big day.
    It takes a little time to cold mold the bow, but compared to the strain and force I needed to torture the single plank into itīs supposed place this was a very smooth and nice process. More to my gusto!

    IMG_0990 by capitan Max, on Flickbr />
    IMG_0993 by capitan Max, on Flickbr />
    IMG_0994 by capitan Max, on Flickbr />

    More soon.
    Last edited by Max F; 04-17-2016 at 01:58 AM.

  16. #86
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    Default Re: The Cape Henry 21 building thread

    Looks great Max. How much overlap is there? Scarfed? ~Dan

  17. #87
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    Default Re: The Cape Henry 21 building thread

    Clever approach! I must be honest though. Your troubles with those lower panels at the bow have dampened my enthusiasm for building the CC-19 a little. The construction seems a lot more complicated than I hoped.

  18. #88
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    Default Re: The Cape Henry 21 building thread

    @Dan
    itīs two layers cold molded without scarf.
    Like this at Dudleys radius chine methode: http://www.dixdesign.com/didi26kit3.htm
    The layers will overlapp by half. Im my case 3". Iīll glass it inside an out. So this will be pretty strong.
    @Capefox
    Donīt be scared man.
    Many Folks have build this design succesfully without beeing a professional boatbuilder.
    I went to troubel, because I had my own ideas. Not allways good ones I fear.
    Choosing thinner and stiffer plywood wasnīt the way to go.
    Iīm sure if one uses okume plywood scarfed at the molds, things will be easier.
    Anyway Iīm very happy to cold mold the forward garboard now.
    More work time but less brute force and stress in the wood.
    Iīm having fun again.

  19. #89
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    Default Re: The Cape Henry 21 building thread

    Max,
    Is there any reason you couldn't just leave the extra stringers in place after molding the ply? I mean if
    they're fair to the hull do they hurt anything?
    Really love this design and have it on my short list. You're doing a great job and I'm glad it's warmed up for you. We're have record smashing high temperatures in Seattle while my brother, he lives in Den Haag, cries he's freezing.

    Keep posting. I want to see it sail.

  20. #90
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    Default Re: The Cape Henry 21 building thread

    Is there any reason you couldn't just leave the extra stringers in place after molding the ply? I mean if
    they're fair to the hull do they hurt anything?


    That could be a option. Nothing wrong with that.
    I would probably have done it, if I had considered cold molding from the beginning.
    The ones I put in were tiny leftover battens from non durable wood.
    As I settled on glassing the inside an outside of the garboard they would be a extra hassle to work around.


    I got something done this week

    IMG_1005 by capitan Max, on Flickbr />
    IMG_1003 by capitan Max, on Flickbr />
    IMG_1009 by capitan Max, on Flickr

  21. #91
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    Default Re: The Cape Henry 21 building thread

    Looking good Max. bet your glad the warmth has returned.

  22. #92
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    Default Re: The Cape Henry 21 building thread

    Jhipeee the first layer is done. Screw holes filled with thickend expoxi. Soon Iīll start the second layer.
    Impressive shape, isnīt it?

    IMG_1011 by capitan Max, on Flickbr />

  23. #93
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    Default Re: The Cape Henry 21 building thread

    First layer lightly sanded and screw holes filled.

    IMG_1017 by capitan Max, on Flickbr />
    The rabbet is cut with a router and a fence.

    IMG_1014 by capitan Max, on Flickbr />
    The second layer goes on quite smoothly.
    I guess I could use staples only for the process
    I have a better feeling though using both scews with washers and staples in between when it comes to glueing.

    IMG_1018 by capitan Max, on Flickbr />

    IMG_1019 by capitan Max, on Flickr

  24. #94
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    Default Re: The Cape Henry 21 building thread

    Poco a poco the second layer is closing.
    I manage to get 4 strips per side at one evening.
    First i paint the parts with unthickened epoxy, and then I spread the goo with a notched trowel and level it with a finer one.

    IMG_1036 by capitan Max, on Flickbr />
    IMG_1037 by capitan Max, on Flickbr />
    Yesterday, a warm and sunny day, I had 34 degress C in the shed when I opend the doors. So ist slow hardener time.
    I spread all the glue on to the hull imediately after mixing. So it wonīt heat up in the cup. Here it is the amount for 3 strips.
    Works nice.
    After that itīs staples and more staples.
    I start stapling at after edge and work my way evenly to the front, so that air and glue can squeeze out.
    Man itīs million of staples.

    IMG_1038 by capitan Max, on Flickbr />
    I started with galvanized staples, but they were too brittle and often broke when pulled out.
    So I had to heat up each staple with a soldering iron. I donīt have to tell ya that this was slow and tedious work.
    I gave it a try with stainless staples, and are very happy with them. No breaks at all.

  25. #95
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    Default Re: The Cape Henry 21 building thread

    Tadaaa I got the last strips in place

    IMG_1042 by capitan Max, on Flickbr />
    In the meantime spring has set in violently. Blossoms everywhere.

    IMG_1043 by capitan Max, on Flickbr />
    Man I love this time of the year.

    I couldnīt resist to climb onto the hull to get another angle of view

    IMG_1046 by capitan Max, on Flickbr />
    Pulling out all staples was boring but surprisingly quick. Time for the tortureboard!

    IMG_1049 by capitan Max, on Flickbr />
    I really like to use strips of foam for the boards. Different lengths and densities. They are extremely light and make the whole affair much more pleasant.
    Didnīt need a sweater that day though.

    Tomorrow Iīll be sailing for the next days

    Max

  26. #96
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    Default Re: The Cape Henry 21 building thread

    thats a very "sharp" bow Max. your method of laying it up looks to have worked really well. Should get way easier with next planks. We have Autumn here, the other best time of year. Nice shot of blossoms

  27. #97
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    Default Re: The Cape Henry 21 building thread

    That wouldnīt be that wet cold and rainy Autumn we usually enjoy at my place I guess

  28. #98
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    Default Re: The Cape Henry 21 building thread

    Got the first side of the garboard glassed.
    With help from work mates it was quickly done.
    It took us one and a half hour. Two hours from start we already had barbecue and beers


    IMG_1061 by capitan Max, on Flickbr />
    IMG_1062 by capitan Max, on Flickbr />
    IMG_1065 by capitan Max, on Flickbr />
    To let the epoxy cure I leave it now some days before I sand the overlapping layers at the centreline.
    Meanwhile I got some more fillets done at the bulkheads.


    IMG_1068 by capitan Max, on Flickr

  29. #99
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    Default Re: The Cape Henry 21 building thread

    Good to see it finally done Max even though you went the hard road. Good on you

    i hope you gave them some more beers after!

  30. #100
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    Default Re: The Cape Henry 21 building thread

    Great job, Max! You're overcoming your difficulties in fine style. Nice view from your workshop too.
    Ian

  31. #101
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    Default Re: The Cape Henry 21 building thread

    Well done! Nice progress....

  32. #102
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    Default Re: The Cape Henry 21 building thread

    Thanks Guys
    And yes they definitely had earned more than only one beverage
    Some days later I took off the peel ply and smoothed out the overlapping glass on the second side.

    IMG_1073 by capitan Max, on Flickbr />
    Ready I was for the second attack.
    As none of my mates had time on that particular weekend, I had to figure out how to proceed anyway.
    Could have waited some days to get help, but I really really had difficulties to stop me from getting the job done.
    First I made a test panel to check out if I can fill two layers of 430g/sqm glass at once with resin.
    That worked very well. I guess the temperatures of 30 degrees C helped a lot, as the epoxy was thin as water (west system!).

    After that I prepared the two layers for the job.

    IMG_1074 by capitan Max, on Flickbr />
    IMG_1076 by capitan Max, on Flickbr />
    That way we made it an easily managageable task.
    We started at the stern laminated roughly a one meter section of weave at the time, pulled some peel ply over it and went on with the next section.
    Only 2,5 hours later my sweetheart ( Oh yes she joined in) and me were done with a perfect job.

    IMG_1078 by capitan Max, on Flickr

  33. #103
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    Default Re: The Cape Henry 21 building thread

    I have seen plywood with only one side glassed warp more than once.
    Because of that I decided to do it the save and hard way.
    I started glass the inside of the garboard immediately after to get an symmetrical structure.
    This is probably not really necessary, I could have done this much easier after turning the hull.
    BUT I liked the idea and had to try it out!

    First I made the templates.
    To stick these over head to the garboard I used double sided tape.
    Usually that stuff sticks too good to the wood and is a hassle to get off again. With one piece of normal tape first, this was no issue.

    IMG_1084 by capitan Max, on Flickbr />
    Making the template from several pieces of thick paper makes the fitting much easier.

    IMG_1083 by capitan Max, on Flickbr />
    With the finished and perfectly fitting template I cut both layers of glass at one time. At the overlapping centreline I left the second layer 40mm proud of the first one.

    IMG_1085 by capitan Max, on Flickbr />
    With a some plastic sheet first on the table I filled the glass right here , covered it with a second sheet of plastic and rolled it on to a cardboard tube.
    With that I went under the boat. The plywood was coated with epoxy some minutes before.

    IMG_1086 by capitan Max, on Flickr
    Last edited by Max F; 06-12-2016 at 12:31 PM.

  34. #104
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    Default Re: The Cape Henry 21 building thread

    Sticking it on was a little difficult the first time, but that changed quickly as I got tuned in with this new technique.
    With the glass sandwiched in between the two pieces of plastic there was no danger that it would change itīs shape.
    I unrolled it bit after bit and pulled of the upper plastic sheet and pressed it to the plywood with one hand.
    Looks awful anyway as long as the second plastic sheet is still in place.

    IMG_1087 by capitan Max, on Flickbr />
    But as soon as the upper plastic sheet was removed and the glass was worked smooth with a plastic spreader and a sheave roller the result was impressive.
    The last step was to put on some peel ply.

    IMG_1088 by capitan Max, on Flickbr />
    Done and happy!
    Prior to doing this I expected it to be much more troublesome and complicated.
    So Iīm very happy all went on so well. I gues that proper planning and creating it with easy manageable steps helped a lot.
    So far for now guys.
    The European soccer-championship is calling for me right now.

    Max

  35. #105
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    Default Re: The Cape Henry 21 building thread

    I admire your courage doing that glasswork upside down Max. I think the words of encouragement that seem most apt are "keep it up"

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