[QUOTE=Richard_jersey;380074. . . Perhaps this will silence all the snake oil comments, I await in anticipation and the hope of ending the annual ritual.[/QUOTE]
Testing on a couple of "dinghies" with either wooden construction or the usual 0.125 or less inch thick fiberglass
or polypropylene or pvc hull
is as far from a valid test as you can get for how something would work on a full size FRG or other type hull
, boat. Normal FRG boats range from 3/8" to 3/4" inch or more thick hulls made with anything from polyester resin to vinylester to whatever high tech or low tech hull layup
. Those tests will have virtual no correspondence to reality and then add in the aforementioned totally different sea-life and water
temperature/salinity conditions of Poole Harbor versus Antigua
, New York
, Marseille and the hundreds of other places.
- - The normal process of fouling on a boat bottom starts with a slime growing on the surface of the hull followed by thicker algae and even what we call in the Caribbean
"sea moss" - a fine hair like sea plant. These growths isolate the anti-foulant paint's active ingredient from being released and then the barnacles
, proto-coral and other flora and fauna of the oceans can take up residence on your boat's hull.
- - Using a mechanical "vibration" device be it low-freq or ultra-sound will be dampened to nothing by the layers of growth and also by the shear mass of the thickness and composition of a FRG, wood, or metal within a few cm of the transducer location. Witness the growth that covers your depth sounder
transducer which is also a similar type technology.
- - These same type devices are sold as mosquito repelling, and a hundred other theoretically possible applications. Just like the "magnet" to keep algae out of your diesel fuel
, they sound great but do nothing in reality except help keep your wallet from getting too heavy.
- - Practical real life proof is that commercial
ships, mega-yachts, cruise
ships, etc. do not use any of these types of "wonder-cures." If they did work, the devices would be mass marketed to the "big guys" who have a real economic reason to use them.