Saltynuts 6 Posted December 30, 2023 Share Posted December 30, 2023 2 hours ago, Frank said: The new Kuaka is ready to be hung, the old one alas is done for. The backboard is Honduras Mahogany from some old building, it had a gorgeous grain and was nicer to work with than Sapelle. I need to do the Alan Wright Tracker at some stage I don't suppose anyone has a lines drawing ? Wow!! There is a business opportunity there.. Quote Link to post Share on other sites
Frank 157 Posted December 30, 2023 Share Posted December 30, 2023 2 hours ago, Saltynuts said: Wow!! There is a business opportunity there.. Alas the labour content is too high however it could work if you modelled it in 3D and printed it although it would still require quite a bit of finishing and a backboard. A previous place I worked at had a large format 3D printer and a contractor who was a real pro with Solidworks. I'd done a half model of our Hood 38 and needed a copy for a partner so he scanned and printed it, I got the impression he put in quite a few hours to turn the point cloud into a printable file though (the one below is a 3D print) Quote Link to post Share on other sites
Saltynuts 6 Posted December 30, 2023 Share Posted December 30, 2023 1 hour ago, Frank said: Alas the labour content is too high however it could work if you modelled it in 3D and printed it although it would still require quite a bit of finishing and a backboard. A previous place I worked at had a large format 3D printer and a contractor who was a real pro with Solidworks. I'd done a half model of our Hood 38 and needed a copy for a partner so he scanned and printed it, I got the impression he put in quite a few hours to turn the point cloud into a printable file though (the one below is a 3D print) Yeah I hear ya. There must be a lot of hours go into those. I wonder what upper price point they would still sell. People get very attached to their boats and fiscal responsibility would have limited influence over a purchase like that. Would make a fantastic present from a significant other... Anyway geat job 👍 1 Quote Link to post Share on other sites
aardvarkash10 960 Posted December 31, 2023 Share Posted December 31, 2023 On 17/12/2023 at 6:06 PM, aardvarkash10 said: Duckboard from the cockpit sanded and revarnished. The antifoul job was also completed today but the grey underside of a 50 year old keeler isn't that interesting so no pictures. The surface turned out very slippery when wet, so I aliexpressed some clear (translucent) grip-tape. It's now undergoing sun/rain cycle testing on the back deck at home. Only $2/m landed in NZ so if it lasts a season that's fine. Quote Link to post Share on other sites
Frank 157 Posted December 31, 2023 Share Posted December 31, 2023 4 hours ago, Saltynuts said: Yeah I hear ya. There must be a lot of hours go into those. I wonder what upper price point they would still sell. People get very attached to their boats and fiscal responsibility would have limited influence over a purchase like that. Would make a fantastic present from a significant other... Anyway geat job 👍 Actually you just jogged a memory from 1980 ish, a colleagues parents had a Towson 32 and he was selling wooden half models at a quite reasonable price but he would not divulge the manufacturing technique. Later I heard he had made a pattern and then reproduced them on a friends Copy Router. I'm unfamiliar with that device but I wonder if it similar to that used for wooden propellers, they are ingenious https://www.google.com/search?q=wooden+propeller+shaper&sca_esv=594672148&tbm=isch&sxsrf=AM9HkKnOz2HPn3ZSIRZ9e1VYftb4jjlvBg:1703993064448&source=lnms&sa=X&ved=2ahUKEwi7lbnq3LiDAxVBUfUHHQ9gA8sQ_AUoAXoECAMQAw&biw=1366&bih=568&dpr=1#imgrc=PtpTlhKDCcl3BM Quote Link to post Share on other sites
Addem 95 Posted January 1 Share Posted January 1 On 31/12/2023 at 11:46 AM, Saltynuts said: Yeah I hear ya. There must be a lot of hours go into those. I wonder what upper price point they would still sell. People get very attached to their boats and fiscal responsibility would have limited influence over a purchase like that. Would make a fantastic present from a significant other... Anyway geat job 👍 Too right. I'd live to have a few of my past boats. How much would I pay though...dunno. it'd be interesting to know how many hours are involved. Quote Link to post Share on other sites
Frank 157 Posted January 1 Share Posted January 1 I decided that Kuaka needed, a companion flying off the port bow Another here is my carpenter 29 in kauri with Mahogany WL, the backboard is from an old oak cupboard. The basic process is straightforward and anyone who can use a jigsaw, plane, spokeshave and sandpaper will find it easy. If you have a lines plan just xerox the WL sections at 1/12 scale and glue to the laminations with spray on Ados F2. Cut them out with a jigsaw or if you have one a bandsaw, then stack and glue them in correct order bread and butter style (Modified PVA is good) From there rough it down to the intersections with plane and spoke shave but don't quite loose the junction lines, cut out one or two cross sections say midship and near the bow to use as checking templates as you go. Ease down to the final material removal checking for fairness with template and Mk1 eyeball. Painted versions have the advantage that you can use builders bog to correct any mistakes. As for painting well just do what you would on your full size boat, its the same process. Use Tamiya model masking tape as it seals well at the edge and gives a nice crisp line. Kuaka took so long because I could not get the lines plan so I had to make several visits to the wreck to take measurements, and then draw it. Of course as soon as you get home you think of all the measurements you forgot, luckily it hasn't had an excavator put through it yet but as there are some rather posh estates overlooking the foreshore there I don't think that will be far off. I have never sailed the boat but have a sentimental connection because its been a feature in the local estuary since the early 1960's its the earliest yacht I can remember seeing. Its a sad end but now at least her memory is immortalized in the club lunch room Quote Link to post Share on other sites
K4309 258 Posted January 1 Share Posted January 1 There was a guy in the BOI doing half models commercially. But that was maybe 15 years ago now. I got one done of our boat as a gift for my father. Was about $250 ish at the time. I didn't have line drawings so had to take detailed profile photos of the hull out of the water. He sent me approximated line drawings from the photos, which I reckon were top notch. Quote Link to post Share on other sites
Frank 157 Posted January 1 Share Posted January 1 Yep, its surprising how much you can establish with a tape measure basic and data such as LOA, beam, draft etc. Then photos can give you a good approximation of sheer line, bow/stem/keel/rocker/rudder etc. I paste the photos into 2D CAD and trace over them, a camera does create distortion but you can compensate somewhat. The only aspect that is hard to really nail are the frame profiles/sections etc but the transom is a known and you can wing from there. The result wont stand close scrutiny if someone has the drawings and gets out the the calipers but its close enough to be instantly recognized as the design in question. There are ways to take off the frame profiles, which would be needed if you wanted to build a copy and did not have the original drawings, that would have to be a very old boat I would imagine. Back in the day apparently a lot of vessels started out as a half model and then the builder just ripped into construction of the full size boat taking measurements from the model, no drawings just a lot of experience and a practiced eye, they probably still do it that way in less developed areas of the world. Quote Link to post Share on other sites
Frank 157 Posted January 1 Share Posted January 1 31 minutes ago, K4309 said: There was a guy in the BOI doing half models commercially. But that was maybe 15 years ago now. I got one done of our boat as a gift for my father. Was about $250 ish at the time. I didn't have line drawings so had to take detailed profile photos of the hull out of the water. He sent me approximated line drawings from the photos, which I reckon were top notch. That is very good value, I found a place on line that looked to be in the caribbean somewhere, they had a long list of designs for which they would ship you a half model but they were $450 US sans freight. One or two on their list that I was familiar with looked to have basic detail errors though. Quote Link to post Share on other sites
Saltynuts 6 Posted January 1 Share Posted January 1 18 hours ago, Addem said: Too right. I'd live to have a few of my past boats. How much would I pay though...dunno. it'd be interesting to know how many hours are involved. The big head scratcher is what would a half hull of a catamaran look like and would it cost twice as much??? Quote Link to post Share on other sites
Deep Purple 512 Posted January 3 Share Posted January 3 On 2/01/2024 at 11:23 AM, Saltynuts said: The big head scratcher is what would a half hull of a catamaran look like and would it cost twice as much??? I presented a half model of Sundreamer i had made to the squadron a few years back. Quote Link to post Share on other sites
Frank 157 Posted January 3 Share Posted January 3 On 2/01/2024 at 11:23 AM, Saltynuts said: The big head scratcher is what would a half hull of a catamaran look like and would it cost twice as much??? Or 1/4 as much because you are only building half of a half of the boat Quote Link to post Share on other sites
Saltynuts 6 Posted January 3 Share Posted January 3 3 minutes ago, Frank said: Or 1/4 as much because you are only building half of a half of the boat Stop it my head hurts 🥴 Quote Link to post Share on other sites
Frank 157 Posted January 3 Share Posted January 3 28 minutes ago, Deep Purple said: I presented a half model of Sundreamer i had made to the squadron a few years back. I have pondered the same question but could not think of a good way to capture a multihull the Sundreamer model looks great though , nice work ! Quote Link to post Share on other sites
Saltynuts 6 Posted January 3 Share Posted January 3 31 minutes ago, Deep Purple said: I presented a half model of Sundreamer i had made to the squadron a few years back. I suppose that is the only logical conclusion. But did it cost twice as much? Quote Link to post Share on other sites
Frank 157 Posted January 3 Share Posted January 3 On 1/01/2024 at 4:23 PM, Addem said: Too right. I'd live to have a few of my past boats. How much would I pay though...dunno. it'd be interesting to know how many hours are involved. You should be able to find your past yachts here, the available range is vast, (167 pages) expect to pay north of $385 US, the shipping to NZ could be expensive . https://abordage.com/custom-models/custom-sail-boats/# Quote Link to post Share on other sites
Addem 95 Posted January 3 Share Posted January 3 On 2/01/2024 at 11:23 AM, Saltynuts said: The big head scratcher is what would a half hull of a catamaran look like and would it cost twice as much??? My present boat is a cat. (F41). I wouldn't do her as the lines are mostly about the bridge deck. Keen to consider a Challenge 29 and Elliot 10.5 - and Frank is right - process is simple but time consuming. I took lines of Jetstream (C29) manually lotsa years back when I was looking at doing the same mod as Meister (a great boat - now for sale https://www.trademe.co.nz/4462817748 ). I hope I still have them. Now to see if I can find a set of Elliot line plans somewhere. Anyone got any? Quote Link to post Share on other sites
LBD 128 Posted January 6 Share Posted January 6 Productive (3 day) weekend... 1)Installed a 30L Quick Hot water system, works a treat, nice to have hot water on tap and a warm fresh water wash at the end of the day. 2) Removed the stbd genoa track cleaned and primed the deck then replaced the track on a series of Micarta/Tufnell pads all well sealed on Butyl/mastic tape with large washers beneath the deck to spread the load. The gaps in the packers allows the water to drain through... all in all, a good watertight outcome. The fasteners inside the back of the galley cupboards were a challenge to get at. Next 3 tracks are easy to access.. 3) Made a celebratory dent in a new bottle of rum as a reward for the above effort. 3 1 Quote Link to post Share on other sites
Frank 157 Posted January 7 Share Posted January 7 On 6/01/2024 at 8:36 PM, LBD said: Productive (3 day) weekend... 1)Installed a 30L Quick Hot water system, works a treat, nice to have hot water on tap and a warm fresh water wash at the end of the day. 2) Removed the stbd genoa track cleaned and primed the deck then replaced the track on a series of Micarta/Tufnell pads all well sealed on Butyl/mastic tape with large washers beneath the deck to spread the load. The gaps in the packers allows the water to drain through... all in all, a good watertight outcome. The fasteners inside the back of the galley cupboards were a challenge to get at. Next 3 tracks are easy to access.. 3) Made a celebratory dent in a new bottle of rum as a reward for the above effort. Ooooof ! nice work, the Tufnell looked good too Quote Link to post Share on other sites
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