https://en.wikipedia.org/wiki/Magnus_effect#In_aviation
(can't help but think "tilt rotor" of a different kind)
So I am reasoning with a side wind 'on the beam' you get a force pusing forward. Which incidentally is a traditional rigs best point of sail. This doesn't appear to be the full story, since the boat in the photograph is healed over in the same way as the gaff rigged sailboat next to it, so there appears to be some sideways force too. Laterall resistance of the hull in the water will force that into a resultant force that is mostly forwards (but with some leeway) I presume.
I am supossing that when running before the wind this means the force is to one or other sides of the ships axis (depending on the rotation). The resistance of the hull to lateral motion forces this again into forward motion. But the sail is indeed being obstructed by the containers and I believe the force will therefore be diminished as per the OP, since the wind has led sail area to act on.
I am inferring all this since the wiki is light on detail.
I would be concerned that one cannot reef this kind of sail. In a storm it is going to heel the boat more, change its motion through the waves, perhaps press the bow down. Bearing in mind that on a traditional square rigger, one would lower the top part of the mast before a storm to reduce windage.
I feel a better reference would be an aid... but I'm with the op, at some points of sail the containers are in the way
A suction sail is a more or less conventional airfoil that houses an axial compressor to basically suck in air which causes the boundary layer to stay attached which generates lift via the same mechanisms as an aircraft wing.
From a distance and to a casual observer they’re pretty similar.
https://www.google.com/search?client=firefox-b-d&q=airship+t...
And the higher oil prices go, the more people are interested in saving oil.
For low-value and bulk cargo, ships make sense, and modern computer-controlled sail trim and wind energy harvesting probably makes a great case. But high value cargo is largely today shipped by air. Nvidia wants money for its chips ASAP, too valuable to sit around non productively while being steamered. Maybe with surplus wind energy they could mine bitcoin while en route?
A sort of related topic, about 20 years ago during peak farm-to-table "buy local" fashion, the NY Times pointed out that lamb shipped from New Zealand (where is that on a map, I can't find it?) to New York City arrives with a lower carbon footprint than lamb delivered by trucks from nearby upstate NY farms, such are the economies of scale in shipping.
But now, blow me down me hearties, I look forward to dining on New Zealand lamb carried to my door by the winds of fortune!
International cooperation and trade is great, but in the US specifically the economic behemoths have used globalization to paper over the real problems that we face at home (we haven't truly invested in infrastructure in a long time, the meat we produce is rejected on health standards abroad, etc). I doubt the smokescreen will last much longer with Trump et al blowing up international agreements.
What do you mean by this? Most US freight trains are already diesel electric. German freight uses overhead electric wires on most of the shared passenger rail network, which is great, but doesn’t make it any easier or faster to deliver freight to consumers. Are you thinking of high speed rail? Bullet and maglev trains aren’t used to deliver freight anywhere globally that I’m aware of.
It reduces the carbon footprint considerably if you don't have to fill up your trains with carbon.
I'm German, so I'm well used to dishing out on our railways, but at least our rails don't look like spaghetti that have been way overcooked and can only safely be driven at walking speed. And the amount of black smoke the locomotives emit when spinning up their old engines... wouldn't pass any emissions inspections here in Germany.
After that, I'd question local sheep farmers about how suitable upstate NY is for raising lambs, compared to NZ. And about the regulatory and business environment they face. Agriculture in the US is a hellish mess, and the great majority of its problems are caused by neither its associated carbon emissions nor by underinvesting in transportation infrastructure.
Farm fresh vegetable produce is perishable and goes from fresh to wilted/rotten very quickly. It is in the capitalist interest with no regulation to move fresh produce as quickly as possible to the supermarkets and onto the shelves. Every day trucks bring fresh produce from NJ and LI and upstate NY into the city and it immediately goes onto the shelves for sale. No communist system could do it as well.
Produce is an extremely profitable segment of supermarket sales. The markups are very low (no communist could compete) but the turnover is very quick. While a can of beans might sit there a few weeks, customers love fresh produce. So hypothetically, they could make a 0.5% markup (you going to take public transit to NJ to buy produce a half a point cheaper?), but that's every week, so in a year it's a healthy 25% markup for the supermarket's annual investment. I made up the numbers to explain the concept, but that in a nutshell is supermarket economics. Maybe they mark up 2% and the annualized profit is 100%. Tiny margin, healthy profit, point made. Very efficient, happy customers, happy supermarkets.
Trucks bring produce farm to table, maybe a distribution stop. Trains are for bulk stuff and not route flexible, so it's not clear they contribute any advantage to the mix, but I love me trains too.
And it's not just NYer's, that's just an urban extreme example, every supermarket chain the the country operates like this.
Turns out, sail-power scales sublinearly and, shocker, the wind isn’t a reliable source of power for the logistics demands of today’s supply chains.
We’re never going back to wind, but we will be de-carbonizing shipping either with ammonia combustion, fuel cells, or both.
Eg putting these things on ammonia powered vessel will reduce the amount of fuel needed, which is probably a net benefit.
> The idea is not to turn modern cargo ships back into sailing vessels. Instead, these systems are designed to work alongside conventional engines, using the wind to reduce fuel consumption whenever conditions allow.
Can we built giant conveyer belts across the ocean?
ftfy