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Hi everyone This is my second venture into model boat building. The first model was an unbuilt yacht design by a Sydney amateur yacht designer; this one is a much earlier design by the same man - E.C. "Cliff" Gale. Karoo was a 20' open sailing boat with a bowsprit & gaff sloop rig. Karoo was raced & was also a family boat. Incredibly they (Cliff & Mrs Gale, plus 3 strapping young sons) used to pack her full of gear for holidays & spend a week or two aboard on Pittwater, Broken Bay & the associated waterways Cowan Creek, Coal & Candle Creek etc. I'm doing a half model of the boat, as a gift for our sailing club model wall. The Karoo was a quick boat, I know because a copy was built about 20 years ago & despite her being given a fairly conservative sailing rig she is well able to keep up or beat with larger yachts. As with the last model the drawn information is not complete, but there are some photos of the original boat. And also I have one of the sons - Bill - who at 95 or so still has an astonishing memory when it comes to yachts. The drawing would have been done from a design half model, Cliff shaped the design in a bread & butter half model, layers dowelled together, & separated them to get the drawn lines. I plan to show some details beyond just the hull: gunwale & toe rail, lower section of the mast, bowsprit, rudder & tiller, centreboard. Coincidentally, it was 90 years plus 10 days ago this drawing was done: The lines show a shallow dishy hull with clean underwater lines; the shape is beamy & shallow. A 40% beam:length ratio is wide, but beamy is (or was) quite common in Sydney: Here, cantering under spinnaker at Pittwater, in the early 30s: This is the rebuilt version, she was slightly lengthened & made finer in the bow. Interestingly the owner's one comment is that she tends to bury the bow downwind under spinnaker. I'm guessing the original didn't do that, or as much, with more buoyancy in the bow. On the left, A12, with a removable cuddy cabin for cruising.
Introduction: Welcome to my Build Log on the my "commission" build of a Westerly Discus 33. The Westerly Discus is a popular cruising yacht design of the late 1980's with hundreds being built by Westerly Marine Construction of Hampshire (UK) until liquidation in early 2000. The Discus 33 was designed by John Laurent-Giles, who drew two design iterations, sloop rigged, and ketch rigged, both with either a fin keel or bilge keels. For more information on the Discus 33, follow the links below: http://www.yachtsnet.co.uk/archives/westerly-discus/westerly-discus.htm http://www.westerly-owners.co.uk/westerlywiki/index.php?title=Discus Why call this a "commission"? This is strictly not a commission as I will not be paid for this build, but my family will be giving this to my Grandfather for his 80th Birthday in January 2017, as he is in the process of selling his yacht Giselle due to ill health. Although the deadline is still 10 months away, I will be trail-blazing to some extent, and will in theory be building this as a 3D model in AutoCAD 2014/2016 and DelftShip (free), exporting the 3D model as an .STL file and then getting it 3D Printed. As this is a gift, the quality of the finish has to be on point, so if the 3D Printing is not up to scratch I will be producing a Laser Cut Plank on Bulkhead model instead. At this point, I will use Delftship to model the hull to the highest accuracy and then produce a cutting plan for all bulkheads, and planks. The final deliverable will be as follows: Half Hull - Westerly Discus 33 Sloop with Bilge Keels, mounted of decorative board Build Log - Bound Book - contents comprised of 3D model development photo's, 3D Printed Model Building, Fairing, Painting and Finishing. Now, the Legal aspect of this build-log. I have purchased the AutoCAD** drawings from the Laurent-Giles Archive, and have been given express permission to build ONE and ONE ONLY half hull model. I am free to manipulate the AutoCAD files as I require to produce a 3D model of the yacht, on the basis that the drawings and resultant 3D model are used to build one model as a gift or for personal use, and are not to be replicated in any way. ** The AutoCAD file that has been purchased is a rework of the original hand-drawn line drawings. This drawing shows all the Waterlines, Shearlines, Buttocks, Keel & Rudder Profiles, Stations, Coahroof Profiles, and the Mast Position. I would have been happy doing this, but this has saved me countless hours on getting the line drawings in AutoCAD from paper copies of the drawings. With this, I'd like to thank Barry van Geffen of Laurent-Giles Archive for producing excellent quality CAD drawings for me to use in the production of this model for my Grandfather. Build Information: The model will follow the basic principles of building a Half Hull model. The Starboard side of the hull will be built up from the plans, in to a 3D model where I will commission a local 3D Printing Company to print the model in three sections, Bow, Midships, and Stern. This will be because of size limitations for printing. At a scale of 1:24, the model will be 430mm in length, and have a maximum beam of nearly 100mm. The Bow, Midships, and Stern pieces will be printed as 5-Sided Cube, with bolt holes for alignment, and finally bolted together with an M8/M10 bolt with a corresponding nut epoxied in to place. If the epoxy is strong enough for the task, then I might just epoxy the pieces together? These decisions are to come in due course. Finally, the model will be faired and painted to match my Grandfathers yacht. The fittings such as winches, mast, boom, kicker, blocks, stanchions, and deck hatches will either be scratch built or bought from a reputable source. I will post Part One of the Build Log later on. Thanks, Jonny