TW28

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rjezuit
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Post by rjezuit »

For electrolysis to occur you need two dissimilar metals, an anode and cathode. If you only have one metal you cannot get electrolysis. That is why the have sacrifical anodes on hot water tanks, and boat motors. The anode is more reactive and corrodes in place of the part you are protecting

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Lackofdistinction
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Post by Lackofdistinction »

Totally right if its totally encased slipped on that one. This is off subject but most sailboats will ground the Keel to the Mast.
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Cracker Larry
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Post by Cracker Larry »

On most powerboats also, such as the TW 28, the mast should also be grounded to the keel (assuming you are building it with the staysail option), and the engine, and the through hull fittings and the rudder and the strut, and the keel cooler, and whatever else you can. Bond everything to everything.

As stated above, electrolysis is caused by 2 dissimilar metals, let me add, separated by a dielectric. The dielectric in this case being salt water. If you don't have dialectric separation electrolysis cannot occur. Hence the bonding.
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kiwi
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Post by kiwi »

Cracker Larry wrote:On most powerboats also, such as the TW 28, the mast should also be grounded to the keel (assuming you are building it with the staysail option), ...
Wooden mast grounded to keel? Mine will be a wooden two part mast with synthetic stays. Going to have a hard time grounding that... How does one ground a Carbon fibre mast BTW?

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Lackofdistinction
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Post by Lackofdistinction »

So you won't have a aneometer or a Radio Antenna on your mast?? :o
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kiwi
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Post by kiwi »

That isn't the mast. That is electronics, they will be going to ground.

Is it neccessary to have a lightning rod on a wooden mast to preserve antenna etc? A carbon fibre mast is a lightning rod all by itself.

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Post by jacquesmm »

kiwi wrote: How does one ground a Carbon fibre mast BTW?

Tony
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With a big fat wide copper braid to a Dynaplate or similar.

You could try to lead it to the keel bolts :P :P :P :P
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Post by Cracker Larry »

Jacques answered, but let me add that carbon fiber is extremely conductive! Drill and tap it for a ground bond.

On a wooden mast I would run a big fat copper braid to the masthead.

What are synthetic stays? New to me. BTW, stay and shroud chainplates should be grounded too
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kiwi
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Post by kiwi »

Cracker Larry wrote: On a wooden mast I would run a big fat copper braid to the masthead.

What are synthetic stays? New to me. BTW, stay and shroud chainplates should be grounded too
OK that means the two part mast must use the tabernacle system rather than having the top just plug into the bottom half.

I was thinking of spectra rigging no stainless wires.

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tech_support
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Post by tech_support »

kiwi wrote:I was thinking of spectra rigging no stainless wires.

Tony
Hey thats what my fishing line is made from :D

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