Boden Boat Plans Australia | Wickedly Accurate Didi 29 Retro Project in North Carolina

Boden Boat Plans Australia

I designed the Didi 29 Retro for Mike Kopman, a professional charter skipper who lives in my hometown of Hout Bay, South Africa. Mikes concept was to adapt the Didi 26 cruiser/racer design to a more traditional concept, with counter stern, bulwarks, boxy trunk cabin and a big gaff rig, for participation in the Caribbean classic racing circuit. Mike received the first CNC kit to this design, supplied by CKD Boats in South Africa. The second kit went to Bruce Mierke of Murphy, North Carolina, which he ordered from our list of plywood kits.

Mike Kopman has been building his workshop ahead of the boatbuilding project, so that hasnt started yet. Bruce Mierke started his boat a few months ago and is moving along very well. These photos are of Bruces build. He began with some smaller items ahead of starting the hull, so I am showing those first.

Rudder

Foil of lifting keel

Beaver-tail ballast bulb

Carbon spars for gaff rig.

Bulkheads and framework set up on building stocks.

This design has a spade rudder that is installed in a cassette so that it can be lifted out through the cockpit for trailing or shallow moorings. Bruce has added a motor well also, in which he will run a Torqueedo electric outboard. The casings that contain the outboard well and rudder cassette can be seen on the photo above and others in this series.

Bottom panels installed, rudder cassette and Torqueedo test-fitted

Radiused section of skin completed.

Aft view, with hardwood-veneered transom

Plug of engine well and rudder cassette in place.

Bruce has modified my rudder cassette design to allow some steerage with the rudder partially raised to assist when approaching shallow moorings with the keel raised.

He is very happy with the quality and accuracy of the kit that we supplied, describing it as "wicked accurate".

For info on our full range of designs, please visit http://dixdesign.com/

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Wooden Boat Plans And Kits | Dont Underload Your Diesel Engine

Wooden Boat Plans And Kits

I have been around boats with diesel engines for more than 40 years. In that time I have heard many times that we should not run a diesel engine under light loads for long periods because "it can glaze the cylinders". Another statement has been "diesel engines like to be loaded". Maybe you have also been told or read this but do you really understand what is going on with your diesel, why it is so important to run it with healthy loads and why you should not over-power your boat?

A turbo charger turbine wheel fouled with soot and fuel, the result of chronic underloading. This gunge also fouls your upper cylinders, exhaust valves and exhaust system. From there it is washed out with the cooling water into the water on which you enjoy your boating. Photo courtesy of Steve DAntonio.

I am a proponent of reasonable size motors in sailboats but often deal with owners who want to put much bigger motors in their boats than I recommend. My 36ft boat had 20hp, my 34 had 12hp and my 38 footer had 18hp. That 12hp could push my boat against a 40 knot wind on flat water. Sure, it was slow progress and the motor was working very hard but it could do it. In less extreme conditions the motor wasnt just ticking over to move her at reasonable speed. A 20hp motor would still be acceptable on that boat but anything bigger would be over-powering it.

Professional Boatbuilder magazine has an enlightening article on this subject on their website, written by their technical editor Steve DAntonio. Steve also works with owners and builders through his own business, Steve DAntonio Marine Consulting, Inc.

The grooves that retain oil in a cylinder wall, known as crosshatch, can be seen here. Frequent light load operation can wear away this pattern; known as cylinder glazing, it exacerbates blow-by and the issues that accompany it. Photo courtesy of Steve DAntonio.

I dont want to repeat here what Steve writes about so clearly in his article, just to point out again that you do harm to your motor, to your bank account and to the environment by over-powering your boat, which inevitably results in you running your motor at speeds that will cause problems. Those problems wont only materialise "in the long run", they can start to appear when the motor has run for no more than a few thousand hours. You will be inviting self-inflicted pain and heartache on yourself and future owners of the boat.

Please read Steves article. And for info on my designs, please visit http://dixdesign.com.

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