Slashdot Mirror
Kite-Powered Ship Launched
The Grand Poobah writes "The big-kite technology we discussed last month has officially launched in Hamburg, Germany. Reuters has a writeup of the new technology, which aims to cut fossil fuel use on sea voyages by an estimated 20% by means of a huge computer-controlled kite. The link includes a video."
sail.
Sheesh, evil *and* a jerk. -- Jade
german scientists improve fuel consumption in cars by 60% using tiny horses for initial acceleration.
film at 11.
Sometimes, it seems, there are no new ideas. As others have said, what we have here is a glorified sail. Nothing wrong with that, but as fossil fuels become more expensive, we'll find more and more "old tech" make a comeback.
The biggest deal in alternative energy right now is the windmill, which have been used for what, 1,200 years? Now we have a (gasp!) sailing ship! Pretty soon we'll go back to using the electric car which was very popular in the early days of the automobile.
No, basic technologies are not new - what's new are refinements. For example, Linux is a re-implementation of a 35 year old Operating System having the chief innovation of a license change. I'm not knocking the quality that Linus has put into the Linux kernel, but Linux is written to be POSIX compliant, so while drivers are nice, Linux is basically no different than any other UNIX but for the license difference.
Innovation can come from some incredibly low-tech, unlikely places. For example, this guy has won numerous awards for sticking a pot inside a pot and filling the middle with wet sand - managing to solve a serious problem in Africa for low-cost refrigeration.
I guess what it comes down to is this: Technology is valuable when it works, not when it's complex. There's lots of very, very, very simple technology that nonetheless works very, very, very well.
I have no problem with your religion until you decide it's reason to deprive others of the truth.
What, upgrading ships from combustion engines to sail? You kids and your newfangled fancy stuff! Next thing you'll be wanting oars!
How long do you think the life of an average cargo ship is?
$725,000 / $1600 per day gives about 450 days before break-even.
Ships have a useful life of 20 to 30 years, so in the end, you wind up about 12 or 13 million ahead, even factoring in a total replacement at mid-life. And this rough calculation is just at (presumably) todays oil prices - when oil is double the price, you're now saving $3200/day and so on.
Plenty of scope for some serious cost savings.
You are in a twisty maze of processor lines, all alike.
There is a lot of hype here.
This is a great start but not the whole answer. The position of the kite allows it to only work with the wind coming from abaft of beam. (from behind)Also creating a "lee-helm", driving her nose down wind. To get the 20% fuel savings (I am guessing closer to 15%, from experience) 50% of the time, a second kite would be needed amidships. The wind would in fact be much stronger at altitude, But with little to block it 100 feet above sea level, I believe a schooner rig would be as productive, more often. "Down-wind" is not the best point of sail. "Close-hauled" is. Where the wind comes from either side of the bow. Creates an airplane wing effect that sucks ship forward. (Positive to negative) With kite alone, the ship would lose a lot of energy trying to stay on course due to rudder angle. Under perfect conditions, this will work great. Just not often. I am retired from the U.S. Merchant Marines and have worked and sailed on many tankers and schooners. I do believe we tossed sail aside to quickly. Amazing, free and renewable energy.
For the perfect anti-Unix, write an OS that thinks it knows what you're doing better than you do and let it be wrong.
Hello. Do you know any actual humans? Here's something to ponder: economic interdependance and global trade is the most effective way to prevent war. If you stop trading, then your neighbour may decide to just come and take your resources.
If you were blocking sigs, you wouldn't have to read this.
I suppose that some of those predicting the end of the Roman Empire were correct.... but it took several hundred years to happen. In that case, I suppose it gave legitimacy to those doom and gloom experts too.
We don't even have an energy problem. Indeed, all of the problems you are complaining about here is due to an over abundance of energy, not a lack of it. The fact that a doom sayer of the finality of the world like yourself can name off at least 4 different sources of energy that can be tapped and transformed into useful forms needed in modern industrial societies speaks volumes about how much effort is going into identifying useful energy forms.
The one huge problem, if there is one, about energy production is not how to extract the most out of the energy sources, but how to keep idiots from extracting too much from those energy sources at once. You may ask "Huh?" here, but pay close attention.... an explosion is just the rapid release of large quantities of energy at once at a point source.... aka a "bomb". And those kill people == very bad technology (to some people's thinking). This is the primary reason why nuclear energy (both fusion and fission) is the big evil bad guy, in spite of the fact that a nuclear future really is the best way to protect the environment in the long run. Not only for waste disposal, but even for mineral extraction costs (including intangible costs like environmental damage) nuclear fission is several orders of magnitude more efficient than petroleum and coal production techniques. For crying out loud, the typical coal electric generating plant produces far more toxic nuclear waste per kWh than a typical nuclear fission power plant. That is completely discounting silly things like CO2 that are now getting everybody's panties in a bunch. Fusion sources, if developed, are just the icing on the cake and make the argument undeniable.
This still doesn't solve the problem of how you can concentrate energy into a useful and portable source that can be tapped by ordinary people, for things like transportation and commerce. And mass transportation isn't always the solution, as there are legitimate reasons why many people don't want to be in a herd and travel the same route and to the same places that 90% of the rest of humanity is at.
FYI, did you know that when you throw a gallon of gasoline into your automobile, that at the refinery more energy was consumed in the processing of the gasoline than is available for you when you burn that fuel? Most of that processing energy comes in the form of electricity, which the oil refineries get from the same sources that power your light bulbs... but the point is that most fuel sources are just energy concentration mediums. And it is important to separate energy production from energy storage. Until you can develop an energy storage medium that is more efficient than petroleum, we will continue to require petroleum or something very similar for a very long time to come. Lithium ion technology looks very promising at the moment, as are some other interesting energy storage devices. Ethanol is, IMHO, a horribly wasteful energy storage form but at least it is a semi-viable replacement for common uses of petroleum if you absolutely must stop the black fluid mineral extraction processes. And most alcohols don't
The trick is to research gunpowder first, so you can see the saltpeter on the map before your opponents can. If you don't have any in your territory, attack and acquire it before they can use it to make musketmen.
Gosh yes, this does appear to be a fatal flaw in their plan. Here's what I suggest you do. First of all you need to send the beermat or envelope with your calculations and these general principles of wind dynamics off to the company and include a written warning in the strongest possible terms outlining why their years of planning, development, testing and implementation have been in vain. Doubtless initally they may horrorstruck with your revelations but eventually you'll almost certainly be called in for some well paid and top level consultancy where you can use your years of expertise to get this failing project back on the rails. Why, I imagine you could do this in your spare time without even breaking a sweat. You're so wonderful.