Wednesday, July 27, 2016

Update on Wide Stern Versions of Didi 40 and Didi 40cr

In February I posted about the wide stern version of the Didi 40cr being built in Australia. Read that earlier post. Amateur builder David Edmiston sent me an update photo with the deck and cockpit nearing completion.
Wider stern at deck level, with T-cockpit.
The underbody of the hull is unchanged, with the topsides more flared to give the wider deck. This allows a broader T-shape cockpit that will work with either tiller or a larger wheel than can fit into the original format.

A plywood Didi 40 being built in India uses this same hull with a different deck and longer cockpit. That boat will be used as the plug for moulds, from which series-built sandwich GRP boats will be produced. The builder is XS-Marines in Mumbai.
Plywood hull being skinned with jigsaw-jointed panels.
Stern view of the Didi 40 wide stern version.
The boats on this post are essentially updated versions of the Didi 38 "Black Cat", the boat that kicked off our radius chine plywood design range.

To see more about our full design range visit our main website or our mobile website.

Monday, July 25, 2016

Didi 29 Retro Project Nearly Done

Bruce Mierke is building his Didi 29 Retro "Arabella" in North Carolina. I have shown his project before, showing his beautiful craftsmanship. Bruce built her from a CNC plywood kit that we supplied.

Bruce's boat is nearing completion and looks really good in the newest photos. These show her pulled out of the workshop, with her rig standing for the first time. The mast stands in a tabernacle and Bruce pulled it upright with a spinnaker pole and tackle system.
Didi 29 Retro "Arabella", beautifully built by Bruce Mierke.
Bruce is a professional boatbuilder and is building this boat for himself. He has many of his own ideas that have gone into the build, so there are some differences from our stock design. These include the cabin configuration and much of the interior. The final result is a good-looking boat with hull lines that promise exciting sailing.
Gaff rig with carbon spars. Clean lines of a radius chine plywood hull.
"Arabella" has an articulating carbon bowsprit that retracts to stow along the side deck. The inboard end of the sprit runs on a track with control lines led to the cockpit.
Articulated and retracting carbon bowsprit.
Carbon bowsprit slides through forestay chainplate fitting.
"Arabella" will be launched in a few months. Next update when she is afloat.

To see our full range of designs visit our main website or our mobile website.

Thursday, July 21, 2016

Didi Sport 15 Adaptive - Sportboat for those with Handicaps

I have written in previous posts about the Didi Sport 15, aka the DS15. You can see one of those posts at this link or use the search window to view the many other posts.

This design caught the attention of two sailors in Santa Cruz, California. George Arthur and Luc de Faymoreau are involved with an accessible sailing program, helping sailors with disabilities to get afloat and sailing. They asked if it would be possible to redesign the DS15 to be suitable for disabled sailors and still have good performance.

The resulting design process has produced a specialised version of the DS15, using the same hull and foils as the base platform but with modified deck and sail plan. The name of the new design is the Didi Sport 15 Accessible, aka the DS15A. We don't yet have a design page for it on our website, that will come with time.
The DS15, basis for the new accessible boat
The deck modifications are to allow two sailors to sit in tandem in secure seats. The crew are seated in a narrower cockpit that allows them to brace themselves against solid structure when they feel the need, or to lean against something solid. The cockpit has low comfortable coamings that crew can hook an arm or an elbow onto, to hold themselves to windward if they want. Severely handicapped or weak crew can be strapped into the seats with harnesses if needed, to assure their safety.
3D Image of the DS15A accessible sportboat.
The rig has been reduced in power because the crew will not have the benefit of the stability advantages from mobile crew and single or twin trapezes. The ballast bulb on the daggerboard will be standard equipment rather than an optional item as with the DS15. It has a smaller asymmetrical spinnaker as well, on a shorter retractable bowsprit, for more advanced sailors in the program.
DS15A sail plan, reduced power but still exciting.
Sail controls are all led to the two seats, with camcleats on the sidedecks or cockpit sole, to share boat handling functions between skipper and crew. Some controls can be operated from either seat, to help with sail training or to better serve crew with different disabilities. Steering is by means of joysticks mounted in front of each seat, driving cables that are connected to the tiller.

This boat is not only for those with physical handicaps though. It is also well-suited to those who feel that they no longer have the agility or fast reactions demanded by a powerful boat like the standard DS15. It is also less intimidating to many wives and other less adventurous people who would still like to get out onto their local sailing waters with less fear that their thrill-seeking partners are going to scare the daylights out of them.

The first boat is about to start construction in Santa Cruz, being built from a plywood component kit, accurately cut by CNC router and shipped from our kit supplier on the East Coast. Construction is radiused chine plywood, giving a round bilge hull that is within the abilities of amateurs. From this first boat they will make moulds, whereafter fibreglass boats will be produced for the use of their own program and to fill orders from other programs and individuals.

We will also sell the design on the same basis as applies to the DS15, so it will be available as plans only, plans with full-size patterns or plans with a CNC kit.

I look forward to seeing the first of these versatile boats sailing. I will update progress with future posts on this blog.

To see our other designs, go to our desktop website or our mobile website.