All Activity
- Today
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A spot of sanding and chain plate resealing.
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When changing from A3 to Masthead Kite after Sail Rock I left front hatch open to ventilate the boat as it was champagne sailing. However; after several beers and another 10 or so kts of breeze it would appear it wasn't the best move!
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Had a blast racing to the Barrier on Saturday despite being 45 mins late for the start and extremely hung over. Apologies for Co skippers language and inability to keep a camera in one plane.... VID-20240303-WA0005.mp4
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I'm seeking 1-2 people to help sail from Wellington to Napier this weekend, 22-24 March. Montego Bay is a 43ft, fast cruiser. Experience is preferable but must be able to keep watch etc.
- Last week
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These boys had a pretty good weekend
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On this weekend at Jellicoe Harbour (North Wharf) https://www.auckland-boatshow.com/
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Grand old log 5knota all the usual trimmings, oozes past adventure and old world charm, and with new fangled colour cordinated isolating switches! Um, do they make em half red and half black for the ultimate single throw DP? Guaranteed to solve your loops.
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Don't get me started on boat values. What do they say when you want to fix / replace or upgrade stuff? Over-capitalised... As long as you use your boat and enjoy it for it's intrinsic value, rather than it's financial value
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Sorted on the Dinghy. Thanks. Shes a bit of an oldie but goodie. A bit of glass patching and tidy up and it will be just what we need. A bit like Actionaire really. But you have to laugh - the pickup was from the Harbourmaster / Maritime Police unit in Mechanics Bay!
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About the only benefit I can see is a doubling of the value of the boat!
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Well, that didn't age well. How many of those are available retail in NZ? I've only seen (and got) red ones, accept for the parallel, which is yellow. PS, I'm only considering lead technologies (lead acid, lead carbon). If you want lithium, then yeah, the requirements and redundancies increase substantially. I'm still to understand the benefits of lithium, esp as retrofits in boats the age of Aardvarks and mine. I'm sure the need for additional isolation is more easily justified in more complex installations you get on these new fandangelled boats. Next you'll be discussing coffee ma
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Are we talking about fuses or isolation switches?
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Most cars have fusible links in the start circuit. I wanted a way to manually isolate. In the event of an emergency it might be the relay controller that's smoking or worse the bms... The switch also isolates the BMS negative. Unless the bms and balancing is cascaded (which is a stupid design) then you can't truly isolate a Lithium. Maybe with a 6pst switch 😂
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Double pole single throw, switch that functions as name implies. After toing and froing I decided three +ve switches on the three batteries in two banks, and two -ve automatic voltage/current/temperature sensitive switches on the LiFePO4 right next to the -ve post courtesy of bms’s was enough isolation for me and I considered it done. The start battery -ve post could do with one to be consistent but seeing as cars are permanently wired to starter motor without any isolation switch and have multiple earth paths I don’t think I can be bothered. Lithium is another level or two of paranoia t
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Dave started following The Harbour Classic - 1st April
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Had a real fun day out on the water for the race, apart from shredding our kite somewhere off Long Bay. Did lots of transom watching as the proper racers showed us how it's done. Really appreciated the generous start line, even though we were a smidge late the amount of room made for a stress free experience. Be back next year.
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I assume DPST refers to : Double Pole Single Throw Switch
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I'm sure there are dozens of ways to configure everything, and each way has a logical argument behind it somewhere. But I just like to keep things as simple as possible. Anyway, here is some logic. The isolator switches are always red. So shouldn't they go on the positive? PS, what are these DPST things you speak of?
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This was the direction of my thinking, and it's for emergency damage control. But I'm cheap, so it would be two spst "key" devices. 1.743 seconds slower to activate, but only $20 for the pair. The starter selector looks after the +ve side, so hit the two keys and twist the start select and the entire battery bank is isolated, both sides. I'm still a bit with K4309 though. I have a built in hatred of ground loops (building audio gear) and additional switches on the -ve side makes space for voltage drop and its inherent riding partners. Keep it up team, what else have I not consi
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I have the isolator on the negative side ,why??Last yacht had a wire(presume earth) to the prop shaft. So in my mind ,even though the battery has no earth it self to the outside world.I am picking with salt crystals etc(boat are always damp even though feel dry) that somehow the earth/negative would be connecting to the water and creating a circuit Now comes a problem,auto bilge pump via float switch needs to be hard wired in,if isolator off ho does pump work?
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By isolating the negative side through which all circuits commonly use as CD illustrates above, it switches everything off. If you want to individually isolate individual circuuits then put in isolating switches for those circuits. It doesn't matter which side as electrical systems are circuits and won't flow until the circuit is complete.
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I'd put your battery switch / isolator on the positive side. Just cause that is what you do. The negatives go to what ever ground you have. The positives have the control (switches) on them. Helps in the future when you start adding more sh*t, you know which way round everything is. Why would you put switches on the negative / earth?
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It depends on what you want to achieve. But ultimately doesn't matter. Some standards recommend that both sides are isolated. Is the objective an emergency off, that isolates everything in the event of smoke? Or is the objective short term storage (1-2 weeks) to minimise all parasitic loads on a single battery? In a dual battery system, with solar, lithium BMS, voltage senses and all the extras you find hanging off the positive terminal and as close as possible to the battery I recommend a DPST on the negative side, that fully isolates both batteries in the event of smoke. T
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As an ex auto electrician, it's hard getting over my inherent belief that you leave the "earth" side alone and put all switching on the live side. But a boat is all above ground so it shouldn't matter right? I may not have thought it through so, tell me your thoughts and experience. Existing equipment includes: One house battery, one start battery both lead acid. Alternator Start battery selector switch (off, start, both, house) VSR Solar with mppt controller Capstan with circuit breaker. Go at it team, which side do I put the isolators and why
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It such a busy calendar it hard to find a free day for our race. We tried really hard to avoid any clashes this year and we were the first event in the AYBA and YNZ calendar but looks like the Gulf Classic have had that date for a while and we just didn't know. We (NZ Multihull Yacht Club) want to work with the other clubs to grow this event into something huge, so please let us know your feedback and ideas.