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About Rick-n-Jo

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  • Location
    Stroudwater Canal, Saul, Glos.

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  • Boat Name
    Pleiades and Bride
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  1. Or get a proper seaworthy boat, sail out of the Thames, back in the Humber. And please leave the lovely quaint anachronistic old canals alone for us who enjoy them in our cramped old narrow boats.
  2. There should be no need to run an immersion with a properly built in diesel generator. Ours runs its cooling water through a calorifier coil ( big-141 litres), and well before the batteries are charged we've enough hot water for a bath. Immersion strictly for shore power.
  3. If your Victron has an on/off/charger only switch, then switching to charger only will charge the batteries and pass through mains to your ac circuit, but will not switch the inverter on (and flatten batteries) if the mains or generator drops out.
  4. I think the reasoning is; if that single earth point became detached from the hull, you would not know, as everything would still work, but any subsequent 230v fault to earth would put AC voltage on the neg 12v wiring. Bad! Two ajacent earth points, while not perfect, possibly safer.
  5. The Chinese still make them. Can be had new for about £1000, but I'm just a bit dubious how reliable Chinese engineering would be for daily use.
  6. Yes. Dissolves in diesel etc. I believe.
  7. Corrosion near the waterline is just simple air/water enabled rusting, most likely here as the steel is in close proximity to both. Galvanic corrosion is electrical, either passive where two dissimilar metals are close together in an electrolyte fluid (like a battery) or actively caused by electric current flowing through the hull, for instance when the boats earth potential is not quite the same as another boat, or the metal piling. Galvanic can occur anywhere on the immersed hull where there is even a pinhole in the blacking, rusting is more likely near the surface where there is more oxygen available.
  8. Rather than opining on what you hope to design, in answer to your original request, when I designed my own boat I used a 2D drawing programme called DeltaCad. Very simple and intuitive to use.
  9. Which effectively makes Microsoft products another form of ransom ware, IMO
  10. If this is the same boat that has no packing in the stern gear, it's all going to be pretty academic soon anyway......
  11. So does that make older boats (most?) more dangerous? Am I at all likely to suffer injury or damage from a properly fused low voltage cable loose for a metre or so behind linings? Or are these more regulations for their own sake? I can say that the same regulatory perfection doesn't seem to apply at my place of work; a complete rat's nest of mains voltage and data wiring trailing loose in walls and roof space, all installed by certified electricians.
  12. OP suggests specs give 7.5A locked rotor current, most Jabsco non-macerators seem to be 7.5 or 8A rated with a 15A fuse, so not a large motor, about the same as my domestic water pump which runs happily off a 360W dc-dc converter.
  13. So returning to the OP question, why not use a 12v-24v converter of sufficient capacity to run the pump motor? Efficiency not really an issue as it would only need to be switched on when the loo's in use.
  14. The shape of the standard narrow boat bow suddenly makes a lot of sense when you see that...