mixing grounds from various current sources, What problems are we likely are we to encounter? What happens when u mix lightening grounds with generator and radio grounds.? Does the Dock polarity matter?
Yes. All those items are a concern, and a little beyond my experience. The biggest issues focus on amperage and polarity. For example, look at the inverter grounds. You have power supply from the AC side, and power supply from the battery side. Those two sources can have very different amperages in a short circuit. I know ABYC standard E-11 has some very specific details to deal with these concerns. And the issues get even worse when mixing a lightning ground with a radio ground. Lighting runs a much higher amperage than your radio and can introduce major problems with EMF in the boat. Sorry, but a full answer would be an entire class in itself. Mixing grounds is like connecting your wall outlet to a power station. They are very different levels of electricity with different tolerances. And the challenge is the fault operations. You have to consider how the ground behaves during a short circuit from any of those voltage sources. It's complicated, and it can be very dangerous if you get it wrong.
when i was a marine contractor specializing in mast wiring without dismasting the vessel, wind instruments, lightning protection and running lights i separated the various grounds and added extra zincs for protection.
I was hoping to know what you thought of semi-submersible yachts. Simply as a way to avoid stormy seas in the ocean by simply going under the waves lower bounds.
If you mean SWATH hulls, I think they have strong potential. I did a whole video on SWATHS here: ruclips.net/video/jJAHyDl6KS8/видео.htmlsi=6Qhu_LxbqszzUfmi But if we mean fully submersible, where most of the ship is underwater, then I don't think it will work. Ocean waves actually extend very far below the ocean surface. Especially with the long ocean waves, you can still feel their effects 20 - 100 m below the surface. To get below those waves, I need a full submarine, rated for decent depth.
I know your expertise and business is modern naval architecture but I'd be interested to see your expert opinion on historical designs that turned out to be dead ends or too niche like the Bazin roller ship, circular hulls like the Admiral Popov or whalebacks. You might look at some old designs that don't meet with modern convention and think the reasons they failed are obvious and boring but I think a detailed explanation of why could be really interesting, and maybe a fun academic exercise for you.
What no comments?... oh well this probably isn't the place for it anyway. I had some ideas for a boat concept thought i would see what you had to say... its way out of my budget but i wanted an opinion. I wanted two Hulls/keels I wanted it to have a hollow about 10' ID 12' OD diameter that runs front to back between the keels think a timber circle with the bottom cut out and curled to the sides like an Omega symbol. the keels would be at the bottom of two beams that would go front to back along the bottom of the omega, like tall sled runners. the hull to the sides of the omega would be framed like an arched beams that curl away from the omega and then back around a cylindrical body 12' ID 14' OD on either side of the upper 1/3 of the omega. the frame/structure of the cylinders would be a spiraled beam set up that would make a full circle around the cylinder every six feet down the length of the boat. both the front front and rear of the cylinders would be merged/capped with a spherical chamber. the main deck would be level across the tops of the two cylindrical sections with a step down into the center over the omega and stairs into the two cylinders on either side from the deck over the omega. there would be a ladder access from the deck above the omega down to a shelf/ledge on either side of the hollow inside of the omega. I rise in the mid deck to the height of the main deck from about mid ship to the rear. the main deck would have an a frame structured to tie to the outside edge of the cylinders tangentially. and the main decks planks and beams would tie into the top cylinders structure. wish i could draw pictures and post them... maybe when i finish my certificate i could send you a cad file on either Autodesk or Solid works, i am still learning the two programs right now.
Cool. I got the general idea from your description. From a physics perspective, i don't think the shapes will make much difference. (Although, I may have misunderstood the description.) But it will definitely look unique. And for yachts, looking good is half the reason to create it. Nothing wrong with having a dream ship. Also nothing wrong with that dream changing over time. I think most naval architects have a working project for their "perfect" personal ship, and their idea of a "perfect ship" changes over time. Myself, I'm currently on version 5 or 7 of my perfect personal ship.
i was a preferred vender when it came to lightning strikes for several marine insurance providers.
mixing grounds from various current sources, What problems are we likely are we to encounter? What happens when u mix lightening grounds with generator and radio grounds.? Does the Dock polarity matter?
Yes. All those items are a concern, and a little beyond my experience. The biggest issues focus on amperage and polarity. For example, look at the inverter grounds. You have power supply from the AC side, and power supply from the battery side. Those two sources can have very different amperages in a short circuit. I know ABYC standard E-11 has some very specific details to deal with these concerns. And the issues get even worse when mixing a lightning ground with a radio ground. Lighting runs a much higher amperage than your radio and can introduce major problems with EMF in the boat. Sorry, but a full answer would be an entire class in itself. Mixing grounds is like connecting your wall outlet to a power station. They are very different levels of electricity with different tolerances. And the challenge is the fault operations. You have to consider how the ground behaves during a short circuit from any of those voltage sources. It's complicated, and it can be very dangerous if you get it wrong.
when i was a marine contractor specializing in mast wiring without dismasting the vessel, wind instruments, lightning protection and running lights i separated the various grounds and added extra zincs for protection.
Many thanks for your work on those videos, really interesting and informative :)
I was hoping to know what you thought of semi-submersible yachts. Simply as a way to avoid stormy seas in the ocean by simply going under the waves lower bounds.
If you mean SWATH hulls, I think they have strong potential. I did a whole video on SWATHS here: ruclips.net/video/jJAHyDl6KS8/видео.htmlsi=6Qhu_LxbqszzUfmi
But if we mean fully submersible, where most of the ship is underwater, then I don't think it will work. Ocean waves actually extend very far below the ocean surface. Especially with the long ocean waves, you can still feel their effects 20 - 100 m below the surface. To get below those waves, I need a full submarine, rated for decent depth.
I know your expertise and business is modern naval architecture but I'd be interested to see your expert opinion on historical designs that turned out to be dead ends or too niche like the Bazin roller ship, circular hulls like the Admiral Popov or whalebacks. You might look at some old designs that don't meet with modern convention and think the reasons they failed are obvious and boring but I think a detailed explanation of why could be really interesting, and maybe a fun academic exercise for you.
That's a very good idea. I'll add it to the list.
What no comments?...
oh well this probably isn't the place for it anyway.
I had some ideas for a boat concept thought i would see what you had to say... its way out of my budget but i wanted an opinion.
I wanted two Hulls/keels
I wanted it to have a hollow about 10' ID 12' OD diameter that runs front to back between the keels think a timber circle with the bottom cut out and curled to the sides like an Omega symbol.
the keels would be at the bottom of two beams that would go front to back along the bottom of the omega, like tall sled runners.
the hull to the sides of the omega would be framed like an arched beams that curl away from the omega and then back around a cylindrical body 12' ID 14' OD on either side of the upper 1/3 of the omega.
the frame/structure of the cylinders would be a spiraled beam set up that would make a full circle around the cylinder every six feet down the length of the boat.
both the front front and rear of the cylinders would be merged/capped with a spherical chamber.
the main deck would be level across the tops of the two cylindrical sections with a step down into the center over the omega and stairs into the two cylinders on either side from the deck over the omega.
there would be a ladder access from the deck above the omega down to a shelf/ledge on either side of the hollow inside of the omega.
I rise in the mid deck to the height of the main deck from about mid ship to the rear.
the main deck would have an a frame structured to tie to the outside edge of the cylinders tangentially.
and the main decks planks and beams would tie into the top cylinders structure.
wish i could draw pictures and post them...
maybe when i finish my certificate i could send you a cad file on either Autodesk or Solid works, i am still learning the two programs right now.
Cool. I got the general idea from your description. From a physics perspective, i don't think the shapes will make much difference. (Although, I may have misunderstood the description.) But it will definitely look unique. And for yachts, looking good is half the reason to create it.
Nothing wrong with having a dream ship. Also nothing wrong with that dream changing over time. I think most naval architects have a working project for their "perfect" personal ship, and their idea of a "perfect ship" changes over time. Myself, I'm currently on version 5 or 7 of my perfect personal ship.