Boats with electric motors don't need a dedicated generator, as the motor can act as a generator when you put it in neutral. (If properly configured.)
brianorca
joined 1 year ago
Sailboats can operate at lower power levels, because their displacement hull is efficient at low speeds. (Where a planeing hull needs higher speeds to get more efficient.) When I had solar electric sail boat, I could motor at 2 knots with no wind using only 500w of solar without touching the battery. I usually ran it at 3.5 knots if there was no wind, which gave me lots of range on battery for a full day on the water.
They also have the sail as a primary power source when there's enough wind, so you don't always need the electric motor. Sometimes, if the wind is strong enough, you can use the water turning the propeller to generate electricity to charge the battery. Or if the wind is light, you can use the motor to add more speed than sail alone, using less battery than using electric alone.
They have one other advantage: unit price. But Lithium is rapidly catching up, and is already better if you calculate price per lifetime charge cycle.
There a whole branch of quantum mechanics research that's trying increasingly complicated ways of not looking at the particles while trying to sneak a look.
This is because NSA has two roles: eavesdropping on foreign adversaries, and protecting our internal systems from adversaries. Under the first role, they might introduce an exploit known only to themselves. Under the second, they help protect US systems from exploits known to others.
A defibrillator is for a heart that is in fibrillation, which is a jumbled, ineffective vibration, NOT a flat line.
True, but it especially applies to drowning because they are under the water, unable to get air to make any noise.
Spoilers in Connect are not readable when I click them. (White on white) Unless I first select the post so the background in grey.
It's because ducks are actually going someplace, while eagles are soaring over a thermal, trying to stay in one spot to watch for food.
Why? I like my Wiz lights. Is there something I don't know about?
I guess it was unexpected that rocks can create a functional battery, and not have been drained after all this time.
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That's why most boat power systems use LiFePo4 (aka LFP) batteries instead of LiCoO2 like you phone battery. LFP is immune to thermal runaway, and can't burn even if it did overheat.