MikeJohns

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About MikeJohns

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    Hobart

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  1. MikeJohns

    Girl with patreon account goes sailing in hot place

    Yes, a force 10 is relentless. There's also a lot of salt water in the air, visibility is poor from a small vessel and you have to lean into the wind, the gusts heel boat significantly . salt spray stings your eyes, there's no worthwhile filming on deck on a boat that size. He's probably reporting the max gust as the experienced wind and consequently adding 40% to the real wind speed.
  2. MikeJohns

    Girl with patreon account goes sailing in hot place

    He's having fun although it doesn't look much like a force 10. Anyway he could have shut the door .
  3. MikeJohns

    Girl with patreon account goes sailing in hot place

    Had one person was seriously ill, couldn’t even keep a teaspoon full of water down, after 2 days they were pale unresponsive and beyond even trying. Emergency medical advice over SSB radio after some diagnosis was to give rectal hydration as quickly as possible and they talked us through it, we had to cobble something together and that was a task on it's own . But It worked very well. We had glucose aboard and were told to add that and salt to warmed water. I carry an proper enema kit now in the first aid and have never had to use it since. My son ( a doctor )wants me to carry IV fluid and learn how to insert an IV drip. I’m not sure that’s possible in severe weather in a smaller vessel. The enema is fairly foolproof. What do you think Olaf
  4. MikeJohns

    Girl with patreon account goes sailing in hot place

    Hot boats not sailing. Drone over a conflagration. https://www.youtube.com/watch?v=GbjpiB6_m64
  5. MikeJohns

    Girl with patreon account goes sailing in hot place

    Strength depends not only on the material but on the amount of material incorporated. There are some terrifically strong reinforced plastic and wooden boats while some are quite fragile . For boats built to, and not exceeding construction standards, steel suffers less damage and is significantly less likely to have the hull breached from collisions than other materials. FRP can be left in the marina to sit for years and clean up OK, as long as it doesn't have too much woodwork and the deck fittings are well sealed. Sailing between sheltered anchorages in well charted areas, with everyone observing the rules of the road, the daintiest of well maintained foam cored boats will be no risk whatsoever to the operators, and great fun. You can go up in strength from there to suit your cruising style and the risks therein.
  6. MikeJohns

    Girl with patreon account goes sailing in hot place

    There's a lot of steel boats around here, many are well built and in great shape. There are a few that don't know what to do, or can't afford to do it properly and consequently are always chipping away.
  7. MikeJohns

    Girl with patreon account goes sailing in hot place

    Funny firefox won't have a bar of it for me, apparently a known issue on some systems. We met Peter of Tamariki a couple of times, lovely chap getting quietly on with doing what most people only dream about... Come south Dylan. If you do we can find some free accommodation for you and I’ll even take you around one of the Great Southern Capes, weather permitting .
  8. MikeJohns

    Girl with patreon account goes sailing in hot place

    No girls and no heat but two men sailing a wooden ketch (that the skipper built himself) back to NZ. Across the Tasman in light conditions with good weather routing. Crewman is a professional videographer with some other nice sailing content on his Vimeo channel. I couldn't get Firefox to play this, something to do with flashplayer, I used Chrome. https://vimeo.com/347166829
  9. FKT; Yes open side down for both seals in this application on the HR (and note that you can get fully stainless seal components). If you really wanted an active pressurized oil dam as an active seal the the lower seal should be inverted.
  10. Hi Zonker; yes I'm well aware of the intention of the oil installation here. But it's only a stopgap add on not well thought through. Also for a radial lip seal the reduction in differential pressure will only make the seal less effective. As for ships aren't you confusing oil pressure fed bearing seals with active outer seals. MARPOL changed the design of active outer seals a few years back. Good luck trying to get anything like through any class or flag authority. Pressurized air is good ! But even without MARPOL, on vertical rudder shafts where the port is subject to dynamic pressure effects well above static head, then the small amounts of water ingress that are inevitable in service in a seaway are trapped by the oil and will accumulate in the lower cavity. That's why the HR design has an open drain port, because a single lip seal in service in a seaway can pass a little water and that is not a problem, a continual stream indicates a problem.
  11. Not when the oil head is greater than the water head. It’ll just keep weeping oil as the oil has a higher pressure but lower density so it’s fed in under a greater head and rises to the top and weeps out of the now apparently failed upper seal. What happens when you disconnect what is now the oil feed pipe. That port should be a free draining hole that drains small amounts of water ingress and indicates a failed lower bearing with a more constant flow. That will tell you everything you need to know. If you get a dribble of seawater then the lower seal is failing or has failed. If you don’t then there’s no problem with the lower seal. Don't worry about sinking the boat it's easily controlled. I was looking at the initial picture you posted and the lower shaft seal bearing area looks corroded on the shaft but it’s hard to tell so I'm just surmising. Who added the oil feed and why ? It really serves no useful purpose unless its an attempt to fix a lower leaking seal. Putting an oil feed into the drain hole is not great practice because it leads to a small amount of water sealed from the atmosphere by the oil. The shaft whether alloy or stainless needs oxygen to protect the metal surface. Below is a pic of the general arrangement. note the location of the drain that your setup is forcing oil into.
  12. As I posted before the main point is that it's already failed and apparently failed a while ago. your oil feed pipe is supposed to be a drain not an oil feed. When the drain starts dripping you note the failure, plug the drain and repair the lower seal promptly at the next haul-out. The top seal you have leaking now is supposed to be the temporary backup seal. These get bodged up to try and overcome the hassle of the repair. The lower seal leak isn't fixed and inevitably the shaft corrodes. It's a classic situation where you get small amounts of trapped de-oxygenated salt water that leads to some very fast pitting. I'd guess that's why the lower seal doesn't seal. The Oil-feed is totally useless if the lower seal doesn't seal. Grease might keep you running for a while but the shaft could have some nasty stress risers from crevice corrosion.
  13. From the pic you posted it looks very much like a corroded shaft around the lower bearing . With these designs your oil pipe is actually supposed to be a warning drain and the second seal is just the backup so you can plug the drain and get to the next haulout. You are running on the backup seal already and the oil is not going to keep the seawater out of the growing problem area on the shaft, waterproof grease would have been best. But the system really has already failed. Dropping the rudder is not hard, the main work is chipping the filling compound away from the lower attachment and bolt recesses. It really needs to come out as you can end up with some serious crevice corrosion driven from trapped de-oxygenated sea water.
  14. MikeJohns

    Commander 31 Bianca

    I'd recommend you email the designer and ask his opinion. It's always worth doing. The boat looks like a comfortable well enough mannered sea boat.
  15. MikeJohns

    My newest project

    And here's the picture to go with the post. A nice contrast to the workmanship going into Bob's current project. The paddle is doing a valuable job hiding the chine transition of the BS hull behind it. But why factory produced fenders when you can use ........................... ( Brent can fill that in )