Lightning Solution from an expert

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Jan 27, 2008
3,092
ODay 35 Beaufort, NC
OK, I hunted down the head sparky that designs lightning protection for airplane controls. I asked if he consulted on the side, and he gladly answered my questions. I described the sailboat problem to him. His answer was "you need to plate your entire boat in a conductive material like copper or gold so it will protect the inside, basically make the whole boat a faraday cage. The option he provided (since this is impratical, but a gold plated boat would be really attractive) was to put a rod at the top of the mast and attach a large cable to it and then run that to a large conductor on the surface of the water. So I said, what you are describing is a lightning rod for a building, his answer "exactly." Now large buildings like the empire state building get hit about 100 times a year with no damage, so this will probably work.
Personally the gold plated boat sounds good. Gold is an awesome conductor, it doesn't tarnish like copper, You will no longer have to wax and buff and compound. You will shine in the sun like a chariot from heaven. The value of your boat will keep going up. Now the plating only needs to be a few angstrom thick so a couple ounces might do the trick.
Criminals might be attracted however.
His other comment about electric devices not plugged in getting zapped, he refused to believe it. I mentioned EMI, EMP etc. he still refused to believe it. Now most of the testing this guy has been doing lately has resulted in failures and multiple redesigns so take this input with a grain of salt.
On another note will a steel boat be a lot better for lightning that a plastic boat? Seems like having the whole boat be a conductor would be a better deal. The guy next to me on the dock had a nice 33 cutter I think he might be selling it.
 

KD3PC

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Sep 25, 2008
1,069
boatless rainbow Callao, VA
Incredibly in today's world, there are almost as many "solutions" to lightning protection as there are opinions on the weather....some appear to be based on science...NEC/NFPA electrical and fire codes...others on defense or military gear..Alpha Delta, transitraps, Polyphaser and the like...then there is the old wives tales...

All will tell you upfront, avoidance is the best, as none of the protection will take a direct hit and still fully protect anything..

I have seen "attempts" at rods and down cables, and was almost afraid to talk to the guy who owned the boat. It appeared poorly designed, and even more poorly installed..

YMMV,
 

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
There is a square mile of forest not far from here and the trees don't seem to be hit any more frequently than the street trees.
 

Dan H

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Oct 9, 2005
143
Catalina C25 SW Michigan
I will tell you last Saturday morning, a maple tree got hit in the back yard. Peeled the bark right off it. That maple sits right next to a willow that is much taller.
It took out the power supply for the wireless Internet hub, the power supply for the Internet antenna, the TV in the bedroom, and nothing else.
The main computer is always unplugged when storms are around. That was a small bolt of lightning and it was impressive.....and LOUD.
I guess my thoughts are that lightning will hit whatever it wants to.
 
May 11, 2005
3,431
Seidelman S37 Slidell, La.
NASA Engineer

I have a NASA engineer who lives directly across the canal from me. He has every modern, scientific anti-lightning device known on his boat. In the last five years, it has been hit twice. I have nothing, except a keel stepped mast, and have not been touched.
 
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