uncleflo
Registered since September 28th, 2017
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Boat Lightning Attenuation Onboard
Saved by uncleflo on May 11th, 2021.
According to published reports, in the US out of the annual average of about 100 deaths due to lightning, approximately 13 are aboard boats. Suffice it to say that if lightning is a hazard where your boat will be used, a plan should be developed to deal with the possibility of a direct strike. In the Pacific Northwest lightning is relatively rare. In Florida, some areas annually have more than fifty strikes per square mile..! According to the well known lightning researcher Ewen Thompson, lightning can develop on the order of one hundred million volts, peak currents of tens of thousands of amps, and generate temperatures of some fifty five thousand degrees. Fortunately, it lasts only a fraction of a second, but within that time it can be deadly and / or very destructive. A lightning strike involves an extremely rapid change in an electric current, generating a momentary but extremely powerful magnetic field. This electro-magnetic pulse (EMP) will readily induce currents in adjacent wiring. Currents induced in wires by the EMP from a lightning strike may do some very weird things, such as fry every piece of electronics aboard. A strike nearby or on another boat can fry the electronics aboard your boat without even requiring an electrical connection or direct strike.
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F-Class « YachtWorld UK
Saved by uncleflo on February 23rd, 2019.
A well-designed sailing yacht is a thing of pure beauty, here are just 10 of the world’s finest… in my eyes at least! Velsheda
When she was launched in 1933, the J-Class yacht Velsheda represented the cutting edge of technology and sophistication and won races against all the great yachts of her day. However, she only was only used for three seasons and after World War 2 it looked as though none of these great yachts would ever sail again. King George V’s Britannia had already been scuttled south of the Isle of Wight, and Velsheda became a houseboat, firmly embedded into the River Hamble Mud for almost 50 years. In the 1970s she was saved from being cut up for scrap after being bought by a group of enthusiasts led by Bembridge bank manager Royce Pook. She then became the first of the class to be restored – in near original specification – thanks to Yorkshire scrap metal merchant Terry Brabant who bought her in 1984. Further refits after Brabant’s ownership saw her refurbished into the spectacular luxury yacht we see today.
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