41–50 of 281 posts
This seems to be a tiny vessel ... just 5000 tons of cargo. Most container ships carry more like 200,000 tons of cargo. Can sails scale to carry that much cargo? If not, I fear the economics will not work out for sails alone. Perhaps sails plus something else makes more sense?
Fixed it.
I am pretty sure there is a reason why the very fast Clippers were replaced by steam engines 150 years ago. I guess we can learn why again.
This seems to be a tiny vessel ... just 5000 tons of cargo. Most container ships carry more like 200,000 tons of cargo. Can sails scale to carry that much cargo? If not, I fear the economics will not work out for sails alone. Perhaps sails plus something else makes more sense?
Sails scale. You can make them out of steel if necessary - the wind does not care what it pushes.
The Neoliner Origin cruises at 11 kts (20Km/h). "Straight line" on Google Earth from Saint-Nazaire to NY is about 5300 Km, so it crosses the Atlantic in 18 days.
The Emma Maersk (which I am aware plies a different route, but just for comparison's sake) cruises at 25kts (46Km/h) and therefore takes about 5 days.
Earlier quoted context omitted.
I have a dim recollection of exactly this as a VC proposal likely put to YC in the past 24 months or so. I think the notion was to fit masts to existing container ship and stacks, and I gsve it scant attention as my intuition (I once studied actual civil/mech engineering prior to jumping ship for applied math) suggested masts are better as integral parts of ships rather than bolt on after thoughts. EDIT: Wingsails to…
Wasn't the main issue with this that fuel is paid for by cargo ship customers (the container owners), not the shipping company? So the shipping company doesn't want to spend a ton of capital to get a 10% discount to all their customers, and there was no way for thousands of random customers to exert pressure on the shipping company to do so. Basically the economics didn't make sense.
Napkin calculation: The Neoliner Origin cruises at 11 kts (20Km/h). "Straight line" on Google Earth from Saint-Nazaire to NY is about 5300 Km, so it crosses the Atlantic in 18 days. The Emma Maersk (which I am aware plies a different route, but just for comparison's sake) cruises at 25kts (46Km/h) and therefore takes about 5 days.
Napkin calculation: The Neoliner Origin cruises at 11 kts (20Km/h). "Straight line" on Google Earth from Saint-Nazaire to NY is about 5300 Km, so it crosses the Atlantic in 18 days. The Emma Maersk (which I am aware plies a different route, but just for comparison's sake) cruises at 25kts (46Km/h) and therefore takes about 5 days.
The logistical chain is long, so delaying one link breaks the whole chain, and that's costly.
This seems to be a tiny vessel ... just 5000 tons of cargo. Most container ships carry more like 200,000 tons of cargo. Can sails scale to carry that much cargo? If not, I fear the economics will not work out for sails alone. Perhaps sails plus something else makes more sense?
But wind's biggest downside, besides it sometimes being too strong, is it can completely stop. That and the complexity of sails, and its potential for failure, would probably not make it economically viable. Even if it was technically cheaper, the inconsistency and potentially poor performance would lead customers to continue chartering motorized vessels. There's a reason everyone switched from sail to steam.
Earlier quoted context omitted.
Bullshit. We're not talking about recreational yachts here. There is not enough energy in wind alone to move huge merchant vessels at economically viable speeds across oceans.
...how do you think trans-oceanic trade was done before steam or diesel powered ships? Plenty of customers don't care about latency, just cost. No fuel = no fuel cost.
Customers care about total cost, not just fuel. There is also crew wages, maintenance, insurance, capital depreciation, etc. Sailing vessels that carry useful amounts of cargo are much slower than equivalent motor vessels so all other costs go up. Fuel is cheap.
Fun fact: the fastest way to get around the world by boat is on a sailboat. Wild, but true.