Fast Electric Yacht Systems Contact Info

John Galt · May 19, 2012

Hi
Just subscribing with a post

SheetWise · May 20, 2012

If someone is still trying to get in touch with people from FEYS -- I talked with a guy in Houston before they closed. Here's a link to the corporate records from Texas.

fpjeepy05 · May 24, 2012

I'm not sure I would consider this a debate. Debate would infer valid arguments on both sides. This in more of a lecture in my opinion.

L_skipper said: ↑

Interesting debate. I realize it's old. Perhaps opinions have changed in the last year? Anyway, simple principal of physics is being overlooked here. Waste. An ice of any variety uses more energy to produce thrust or torque. There is a minimum RPM that has to be maintained to keep the engine running. Go below that threshold and the engine stalls. Reverse is another issue for ICE's. To overcome this an ICE needs a transmission. Transmissions allow slippage in the drive train to achieve low speeds. Slippage equals waste. Electric motors don't need that slippage. They can spin on a trickle. Because there power curve is flat, they produce relatively the same torque at any speed, they have an advantage ICE's don't. No waste. They are superior at low speeds and use no power at idle.

Now for the cruising speed solution. An ICE has a prop that matches the RPMs the ICE needs to generate thrust at both cruising and low speeds. Many boaters "tune" their prop to gain speed or efficiency. All of this is a compromise due to the limitations and restrictions of the ICE always having to maintain minimum RPMs. For electrics the prop can be much larger since the torque available is equal at the low end and the high end of speed. A larger prop produces more thrust. Moves more water. And moves the vessel through the water faster.

Now how to power an electric. A battery pack to begin with. A couple of small generators to maintain the charge and limit the fuel burn when full power is not needed. Think Chevy Volt. The gas generator only comes on when the batteries are depleted. It powers the electric motor intil recharged or forever if need be. Its light and efficient so it has respectable torque for it's size. The boat has the efficiency of the prop and if the vessel is designed for this form of propulsion it will have an efficient hull. Think cats and trawlers. So the electric wins again.

Now for us boaters. We are a rich bunch aren't we? If you have the money to purchase a yacht. You probably have the money to burn some fuel. So why bother with all of this electric and hybrid nonsense anyway. You don't have a cruise line you operate. You don't run container ship across the ocean. Does any of this really matter to us? Maybe. Maybe putting less pollution in our water we love so much would be a good thing. Eventually change is coming. Whether we like it or not.
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Fast Electric Yacht Systems Contact Info

John Galt Previous Member

SheetWise All Beach -- No Water.

fpjeepy05 Senior Member

sanity check diesel electric idea for tartan 30

Help in the right direction with basic small scale diesel electric

Developing dieselelectric concepts.

Electric ala Rube Goldberg

current wisdom on electric

10 feet human/electric powered runabout

diesel electric

electric pontoon

Electric Drive for 30ft River cruiser

Did I finally come up withe use for electric drives?