Didi Mini Mk3 Kit from CKD Boats

Selasa, 26 Januari 2016

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I would have to dig deep in my files to find when CKD Boats first started cutting kits to our plywood designs. Owned by Roy McBride, this Cape Town company has the longest history of cutting our kits and has shipped kits for our plywood boats to many countries around the world. They also have the most experience with packaging large or small kits securely enough to arrive at their destination without damage or loss.

The most remote was a Didi 38 kit sent to Johnston Atoll in the North Pacific. It was a very comprehensive kit that included all plywood, complete rig, keel, engine, sterngear, galley equipment, deck hardware, pulpits, sails and even pre-cut window panels and all the cushions pre-upholstered. This was all packed into a standard 20ft container and had to be shipped via New Zealand and Hawaii, all expertly managed by Roy, his staff and his subcontractors.

CKD Boats has just completed cutting a kit for the Didi Mini Mk3 for a customer in France. It will be packed next week for shipping.
Didi Mini Mk3 sheet fresh from the CNC router.
The plywood components are held in place in the sheets by thin tabs that are left between the full-depth cuts. They are released from the sheets by cutting through the tabs with a box-cutter or jigsaw. This system keeps the plywood as full 8x4 sheets for easy packaging and protection of the components from loss or damage.
Didi Mini Mk3 hull skin panels with jigsaw joints.
The Didi Mini Mk3 is one of the first boats that I converted to jigsaw joints instead of the stepped scarph joints that we used previously. This results in easier assembly and is easier to cut, with less machine time involved. These two panels both show a narrow cut on one side and a wide cut on the other. The wide cut is at the junction between flat and radiused panels, so it has a half-depth rebate pre-cut full length of the panel for the structural joint of the radius panel to the flat sheet.

When this kit is out of the shop, the next will start cutting. This is for a Didi Sport 15 to fill an order from a South African builder.

To see these designs and others in our very broad range, please visit http://dixdesign.com/.
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Chine ideas round stern details

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Heres some sketches of my current thinking on my lower lifting Chines, spray strakes, and a round transom.

This is how I see certain Chines working. When running your skiff and others look at how the water flows out from under the skiff when at all angles of trim. Do this in flat water to get a good view and then in rough water to see what really happens. All small skiffs suffer from the fact that they cannot travel fast enough to get away from beam sea spray blow back. To help in this I feel you need to help direct the spray away from the hull in a downward and hopefully aft direction.

 
I use this reverse spray strake to direct the spray down. Small light skiffs do not need any lift from the middle of the skiff forward. You will have to use trim tabs to get the bow down so why have these lifting  strakes there? In a solid glass bottom they do add some strength but at the cost of being wet.


  Station # 1
Starting at the stern going forward my latest ideas on my bottom lifting - keel strake .
The added keel drawn could be added to the HBBWs Guide and 17.8 and others as they have enough vee to the bottom that will allow these mini keels to not drag.


Station # 2 


Station # 3 
I feel by softening the inner chine it will keep the water flowing closer to the hull and that will  
Get it to be directed downward and lower. Do this starting at the helmsman seat. Aft you need sharp edges to get speed and planning ability. All the spray there is going away from you. 


Station # 4 


A free hand sketch of how this really round transom will work. The bottom stern edge is straight but all above is really very round and soft. I do not like trim tab pockets as too much work . These reverse outty Pockets will be easy for installation as they can fit all kinds of trim tabs and sizes. 


Lots of lines , and angles here. Hope you can see whats happening here.

 
In reality its all very simple but on paper its a lot of lines. To remove the boat hull from the mold you will pull the hull out like taking off a shoe. The only thing is the stern sheer flange downturn will not be there to stop the hull. This is no big deal as it will be under the deck flange.

Hope this helps in thinking of different ways of getting rid that damn spray and making for a quiet stern for the purists out there.
 
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Info Model boat plans bismarck

Sabtu, 20 Juni 2015

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German Battleship Graf Spee Model 1 200 Scale Ship Models Bismarck Photos are illustrative Model boat plans bismarck
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Guide Model boat plans by vic smeed

Selasa, 16 Juni 2015

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The Vic Smeed's Popsie Vic Smeed Plans Above is a picture sample Model boat plans by vic smeed
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Topic Center console boat plans free

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Hot Free plans boat building stitch and glue

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