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Saved by uncleflo on February 12th, 2022.
Diesel engines need no electric supply to keep going, and usually have ample power to drive a substantial bilge pump as well as propelling the boat.Usually, there is no need to run the bilge pump continuously, so the pump is driven via an integral clutch, which allows the pulley on the pump to rotate without turning the pump itself. Fitted with a manual clutch, the pump is engaged by an attached lever. With an electromagnetic clutch using the boat's 12 or 24 volt D.C. electric supply, the pump can be operated remotely, usually from the helm. JABSCO manual and electromagnetic clutch pumps are powerful engine-driven units. These tough and fully-serviceable belt-driven pumps will self-prime rapidly and work continuously over a wide engine speed range. Installed in innumerable fishing boats and other workboats of all kinds, JABSCO clutch pumps are also popular in larger leisure vessels. - No Jabsco pump should be used for petrol, solvents or any liquid with a flash point below 37oC( 98oF)
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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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Saved by uncleflo on July 22nd, 2019.
The operation of electric motors is governed by various laws of electricity and magnetism, including Faraday’s law of induction, Ampère’s circuital law, Lenz’ law, and the Lorentz force. The first two – Faraday’s law and Ampère’s circuital law – are included in Maxwell’s equations. Together with Lenz’ law and the Lorentz force, these principles form the basis of electromagnetism.
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Saved by uncleflo on September 8th, 2016.
Finite Element Method Magnetics - HomePage. Download, Documentation, FAQ, Linux Support, Examples, User Contributions, Miscellaneous, Related Links, Author. Finite Element Method Magnetics
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Saved by uncleflo on June 28th, 2011.
The lights are based on the electrodynamic induction principle, and work when you screw two magnets on the spokes and fix the light to the wheel’s hub. Electric current is then produced when the magnets pass the light, which incorporates a spool of copper wire. The light then flashes every time the wheel rotates. Simple, effective and ingenious. The self-sufficient induction dynamo, the high-quality light diodes and the powerful neodynium magnets guarantee quality and durability. When cycling with Reelight, you feel no resistance when you tread on the pedals. Moreover, the lights are completely silent. With the launch of Reelight’s second model your lights will stay flashing even when you stop at traffic lights etc. The light stores the energy in a built-in capacitor and keeps flashing for several minutes while the bicycle is stationary. With the launch of Reelight's third model it is possible to get lights that shine with a steady instead of a flashing light when you cycle.
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