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CarpeDiem

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Everything posted by CarpeDiem

  1. Gutted. Was hoping to get to Port Fitzroy for our first time this summer. Edit: ) Port Fitzroy Permit Exempt Anchoring Zone: means the area contained within the marine waters of Port Fitzroy, east of a line between Kotuku Point and Mt. Overlook headland of Kaikōura Island /Selwyn Island, and east of a line between the Man of War Passage and Governor Pass. Where is that?
  2. They are Lithium-ion. They have a Iron Phosphate cathode and a graphite anode - Li-ions move through the electrolyte from the cathode to the anode and vice versa. That's the definition of a Li-ion battery - there's a lot of misconception that LiFePO4 are not Li-ion batteries mainly cause people don't want the chemistry associated with the less safe variants. They are considerably safer than other Li-ion chemistries, but they are not the safest. This honor, (currently), goes to LTO (Lithium Titanate Oxide) - LTO isn't really suitable for boat retrofit setups because of the voltage rang
  3. According to the spec sheet on those batteries you can get 1000 cycles by taking them to 100% dod. As a weekend warrior, assuming one is sailing every weekend, that would be 10 years... at 100% DOD... which is very impressive, on paper... However the spec sheet does not say what the impact on DOD has on capacity. Generally using a LA battery at 50% DoD will reduce the useable capacity, so your 50% becomes smaller and smaller over time and this happens much quicker than it does for a Li-ion battery. What I have read on these doesn't say, no sulphation, rather it says that sul
  4. Nice setup - great to see the 2p configuration, awesome to see the insulation between the EVE cells, and great to see that you have compression! This is a smoking good DIY build! What BMS are you using? What isolator are you using? Separate charge and load busses?
  5. Argofet is a Victron brand name - they use MOSFETs internally, all MOSFETs, like all electronics induce a voltage drop. These units suffer between 0.03v and 0.01v drop depending on the current and the units rated capacity. If you consider that something invented in 1959 makes it old-tech then I guess that they are old-tech - but you will find them in the power supply of pretty much every modern day piece of electronics...
  6. I didn't watch the video. The principle is relatively straight forward but requires an understanding of charge discharge profiles... 1. Lead acid rests at ~12.8v and floats at ~13.2v 2. LFP rests at 13.32v (there is no float for lfp) So when in parallel, without any load, the LFP is float charging the LA. As the load comes on the LFP will provide the power to the load. Once the lfp goes below the LA float voltage, power will be taken from the LA, but the amount of energy between 12.8v and 13.2v is insignificant and just surface charge. So the lfp will still provide
  7. There's nothing unsafe with doing this (unless your BMS karks it). There's a few gotchas: You need a programable BMS that will switch off the Lithium-ion battery or it will overcharge... Usually one would program it for 3.55v/cell but you could be more conservative. This means that you won't get full capacity. Because you are switching off at 3.55v, never getting into the CV phase of the charge cycle and not immediately putting load on the battery, you will create a memory effect in the Li and the addional capacity will eventually be locked out. Once you start taking
  8. Polyester LPUs cure with a separation. A very thin layer sets up at the top with the clear solids protecting the pigment underneath. It's like a built-in clearcoat. If you need to touch it up you have to take the whole panel back. It's impossible to just do a section. If you want to buff a section, you'll just rip off the top gloss layer. Carpe Diem is painted with a metallic fleck 2k polyester lpu used on cars. It's absolutely the worst paint ever for a boat. A fender rubs through the top coat it's screwed, a dinghy comes up along side, screwed again. Coastguard comes alo
  9. Pin 7 on ConnC of the mdi is not an ignition signal. You can pick up an ignition signal from the miltilink conn which the tachometer connects to. Pin 7 of ConnC is a dual purpose pin: 1. The mdi momentarily applies battery voltage to this pin to excite the alternator just after the engine starts; 2. The mdi then uses this pin to periodically sense the alternator output voltage and trigger a warning on the canbus if the voltage is outside a threshold (13.1v - 14.9v iirc). The stock alternators have a secondary small rectifier on the D+ for the purpose of isolating the B+ a
  10. We're out this year. Too many crew (including myself) have had sea survival expire. I don't understand why squadron can do a race to three kings @ cat 2 with no sea survival requirement. Mhyc can do cc around the not insignificant Cape Brett rounding, where many a boat has come unstuck, without the need for a liferaft or dinghy at cat 3-, and rayc needs a cat 3+, which is pretty much the same as a cat 1 without the out-of-water inspection, for going around corromandle... There is much inconsistency from YNZ. I cannot help but feel if that if the requirements were aligned there woul
  11. It will disolve it. Anything that doesn't disolve, will appear as a powdery substance in the acid. It won't be chunky unless someone has flushed large objects down the toilet? Eg coins or fishing sinkers... Where does the pipe go to? I would expect the acid to end up there... You could then neutralize it with quantious amounts of sodium hydroxide.. You really want the acid soaking the inside of the pipe so the pipe is submerged. Can you get to each end? Another option would be to connect a pump and cycle the cleaning mixture round and round then you can go with a m
  12. I recently bought a couple of these Harken Quattro winches. The plan was to replace our runner winches with these. We use the leeward runner winch for trimming the kite sheet, so the idea was we could use the speed ring and have a better trimming experience. Has anyone had experience with these types of winches? Is it possible to easily move from the speed ring to the top drum? If you're on the speed ring can you use the self tailer? Can you lock it off or do you have to hang onto the line or have a deck jammer? Can't find any info on the net for these. T
  13. HCl is also great for cleaning rust off tools. This is after 3 minutes soaking. Using baking soda to neutralize the acid. Then I spray it down with wd40 and rinse and repeat next time it's rusty...
  14. I will modify this to say it is damn good at cleaning up corroded/blocked exhaust mixers - but take the exhaust mixer off and drop it in a bucket at ~20% - 25% concentration. Don't run/flush the HCl through your salt water cooling system.
  15. Sulphuric Acid with some detergent mixed in. It's water content disolves the salt. It's such a low concentration it won't damage your outboard. You could flush your loo with it and leave it sitting in the pipes the sulphuric acid will help break down any minerals.
  16. HCl (Hydrochloric Acid). Easily obtained from any swimming pool shop about $45 for a 33% solution. Mix it with water to get a 10% concentration (NB add the acid to the water) or just go hard out and pour in @33% - stand back, wear a mask, eye protection, gloves - be well ventilated. HCl is the active ingredient in Rydelime. The active ingredient in barnacle buster is phosphoric acid. HCl will eat up metal parts such as aluminum, galvanized steel, nickel or other active metals - don't use it on your engine. Phosphoric Acid is more mild acting on scale and mineral deposits
  17. I have seen some boats with finger holes in the floorboards that when you stick your finger in it there's a clasp/lever that releases the floorboard, allowing the board to be lifted. Can anyone please link me to the mechanism that's under the floorboard? Thanks
  18. Westlake Boys’ High School teacher killed during Coastal Classic yacht race He taught all of my 4 children. I am lost for words. Such a tragedy.
  19. I see the start has been moved to Narrowneck vacinity and the times have been pushed back. https://www.coastalclassic.co.nz/_files/ugd/4c9433_4f838310cb564f319654b12cd91a69a5.pdf
  20. You can go yacht racing at both Kohi and St Helliers.
  21. It's obviously the modeling and testing coming in to play at these sites. Cause a week ago everything was black all day long. Right now Mission Bay is safe. And Kohi/St Helliers are getting safer. With Kohi and St Helliers marked as Safe from 5pm today.
  22. That would be correct. The modeling has been in place for many years. It was, several years ago tested and independently verified at being around 90% accurate. Watercare have stated that they are doing tests from multiple locations at multiple depths and they have also deployed bags of oysters that will be tested for comtaniments and heavy metals. Point is that they are testing... I have noticed on the safetoswim site that mission bay/st heliers has been switching from safe to unsafe frequently during this sh*t storm.
  23. Just got lifted and cleaned at the Floating Dock, the operator said the water is in the worst state he has seen it in the 5+ years he has been operating the dock. At the end of each day he is going home itching and scratching which has never happened to him before. SALT divers were supposed be cleaning 40+ boats at Westhaven today, but they aren't getting in the water, they have set up shop at Izzy for those that need a clean before Coastal. With the harbour being tested everyday at multiple locations and different depths, it will be interesting to see how long a gazillion liter
  24. RAYC have moved their start this weekend. No reason why CC couldn't do the same if they needed to. There's significantly less chance of a mob or of gear going overboard while just transiting through the zone...
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