2 ms·
I’d expect you’d need to catch more wind than that to power something the size of a cargo ship. The old sail vessels are basically all sail. Are we violating
by bilsbie 4y ago
I’d expect you’d need to catch more wind than that to power something the size of a cargo ship.
The old sail vessels are basically all sail.
Are we violating conservation of energy here? Why or why not?
- cma 4y agoAt low speeds does resistance to movement scale with turbulence/friction of surface area in contact with water rather than displaced volume? Bigger would then be better and need less and less power as a proportion to overall mass.
- nine_k 4y agoAs far as I could understood: * These are wind-assisted ships, not 100% wind-powered ships. They save some (maybe quite some) fuel when the wind is favorable and the sails are engaged, and use conventional diesel power otherwise. * Rigid surfaces make more efficient sails than soft fabric-based sails, so somehow smaller area is required.
- twobitshifter 4y agoConservation of energy is what makes it possible, once the ship is moving you keep drawing energy from the wind. here’s a small windpowered boat sailing https://m.youtube.com/watch?v=nr7g-03iclA https://m.youtube.com/watch?v=nr7g-03iclA You can also use more powerful wind from high above the sea. This article is on using high altitude kites for power. https://www.maritime-executive.com/editorials/sailing-into-headwinds-using-wind-power https://www.maritime-executive.com/editorials/sailing-into-h...