Solar Impulse Airplane To Launch First Sun-Powered Flight Across America 89
First time accepted submitter markboyer writes "The Solar Impulse just landed at Moffett Field in Mountain View, California to announce a journey that will take it from San Francisco to New York without using a single drop of fuel. The 'Across America' tour will kick off this May when founders Bertrand Piccard and André Borschberg take off from San Francisco. From there the plane will visit four cities across the states before landing in New York."
Wonderful, but see it for what it is (Score:2, Insightful)
At 43mph, they're entirely at the mercy of local weather conditions. And "without using a single drop of fuel"? Tish. Factor in the fuel used by the support crew as they fuss around it. Don't like that? Then let's see them do it without support.
Even with fantasy efficiency, there's no mass-to-surface-area that could make this a commercially viable form of transport, ever. It's a beautiful folly, and an impressive exercise in materials science, and should be enjoyed on that basis. The PV aspect is e
Re:Wonderful, but see it for what it is (Score:4, Funny)
Actually, it seems like space would be the limit unless they give it a solar powered ion thruster. The ground is another limit, in the other direction... and unlike space, the ground is a much more... solid limit.
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Something tells me you don't understand what space is. I never said anything about using the ion engine to get to space, just that it would be needed in space.
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This is, like you said, a gimmick.
Heh, they're just following in the footsteps of those Wright brothers, and that Lindbergh guy.
Re:Wonderful, but see it for what it is (Score:5, Funny)
I agree that we have reached the limits of technology. There will be no future innovation. The endpoint of humanities social and cultural evolution was yesterday.
And it's fossil fuels from here on in.
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No, he's using our knowledge of physical limitations. He said even with perfect materials and 100% energy conversion, etc, this isn't ever going to be viable for transferring heavy payloads (ie hundreds of passengers).
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Perfect as in: can convert 100% of radiated solar energy into electrical energy, weights nothing, has no aerodynamic drag, does not collect dust and debris from the atmosphere, etc :p
His illustration was not that it was impossible to lift a small child, simply that you need a very large PV array just to lift this small child, even with perfect materials. Solar is never going to replace any of the real gas guzzling aircraft that carry hundreds of passengers. Not to say it isn't interesting or useful to conti
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Solar is never going to replace any of the real gas guzzling aircraft that carry hundreds of passengers.
Hahaha.. I love statements like this.
How about a craft with mile-wide wings that unfold at altitude? How about solar power being beamed to the craft from a ground or satellite system (still qualified as solar powered in my book)? The old adage "never say never" exists for a reason.
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You want thousands of commercial planes to have mile-wide wing spans? That's pretty dangerous - not to mention that the maintenance required to keep something like that feasible would be crazy.
Okay, I'll revise it to "craft powered purely by their own solar panels aren't going to replace commercial aircraft". Not unless everyone gets their own personal plane/flying car at least.
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380 yottawats ought to be enough for anybody.
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That was the point of my sarcastic comment.
Am I the only one who remembers several discussions just a few short years back where similar naysayers were telling us how we'd never see quantum computing? That it was all just theoretical and we'd never actually see one working?
For some reason, a group of people here believe that energy (especially for transportation) is some special case, and that it's just silly to even think
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I agree that we have reached the limits of technology. There will be no future innovation. The endpoint of humanities social and cultural evolution was yesterday.
And it's fossil fuels from here on in.
Strawman arguments are lies.
Re:Wonderful, but see it for what it is (Score:4, Insightful)
At 43mph, they're entirely at the mercy of local weather conditions. And "without using a single drop of fuel"? Tish. Factor in the fuel used by the support crew as they fuss around it. Don't like that? Then let's see them do it without support.
Even with fantasy efficiency, there's no mass-to-surface-area that could make this a commercially viable form of transport, ever. It's a beautiful folly, and an impressive exercise in materials science, and should be enjoyed on that basis. The PV aspect is essentially a gimmick though.
Fine. Then use it as a crop duster. Hell, make solar-powered drones for that matter. Plenty of pointless demand for those damn things to justify the fuel savings (well, kind of).
The point is not every form of flight is specifically designed to haul the obese (m)asses and their 200 pounds of first-world essentials around. Try opening your mind a bit as to some of the uses this kind of hardware could provide, especially autonomously.
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haha, it couldn't carry the pesticide for crop dusting, the thing is practically useless.
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Of course it could carry the pesticide, but this aircraft is not designed for that. Lose the weight of one of the pilots, lose the weight of most of the batteries, and it would have plenty of lift capacity to haul several hundred pounds of payload.
There's a different issue, though, and that is if a 208 foot wingspan plane is practical for dusting a field, and the answer is obviously no. But the same technology could be used in a smaller aircraft that carries a 40 pound sack of dust, and autonomously pilot
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Even with fantasy efficiency, there's no mass-to-surface-area that could make this a commercially viable form of transport, ever
It doesn't have to be commercially efficient for the government to use one as a 24/7 drone watching for dissidents.
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This is how America has become a nation of creative eunuchs: myopic focus on near-term profit. Commercial viability? Why the hell would you expect a beyond the bleeding edge technological adventure to be commercially viable? Hell, Columbus' voyage was not commercially viable, although it ultimately brought fabulous weatlh to Spain. The Wright Brothers' Kitty Hawk plane wasn't commercially viable, but it made the brothers rich men. The civilian space program was not initially commercially viable, it was
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Yes, but it was a stupid attempt that maritime experts (the Portuguese) wouldn't dream of considering.
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It had a monetizing plan that was incorrect in almost every particular. The only virtue to Columbus' plan was that it convinced someone to underwrite his expedition, which was spectacularly poorly managed.
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Absolutely. The Fleischmann–Pons device was not commercially viable, although it ultimately.... no, wait....
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Who needs it for transport? This could be a good alternative to cell towers, weather satellites, and so on.
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Wright's plane wasn't commercially viable too.
Obligatory pun (Score:2)
I'm sure the founders are hoping this idea will take off!
The good thing is... (Score:4, Funny)
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It has a battery though, and it could be lithium-ion based...
"To show the world 'power of green technology'" (Score:2)
I like the optimism. I love the plane.
But the optimism is rather misplaced. Let's be realistic: by their own words, it takes wings the size of a jumbo jet's (A340) to hold enough solar cells to fly one person at 43 miles an hour, while also having to be extremely light. Even if we assume only needing half or a quarter of the duration/endurance, say 3 hours of night travel, or even no night travel so no batteries and just day time use on cell power, that's still a fairly large amount of cells taking up a lot
I can see a business case for this (Score:5, Insightful)
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How do you deal with night?
Sure altitude can be used to store power, gain altitude during day, glid down at night, but will that last the whole duration?
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The same way it currently does, by storing power in the batteries during the day.
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Which right now requires landing, so that clearly is not an option.
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Where does it say that?
TFA says "Excess energy is stored in 4 lithium polymer batteries that provide backup power for night flights."
On the project website, it talks about gliding down during the night to conserve energy from battery usage, and cruising up during the day.
I can't find anywhere that says it needs to land to charge its batteries.
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My mistake, you're right.
Just so you know you're not supposed to read the article before commenting. It makes you look like a noob if you actually read the article.
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Yeah, I know. but that part bothered me especially if it was true. So I had to go verify it.
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No it doesn't. What part of non-stop do you not understand?
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Maybe you need to stop being so ignorant. Things have to get done at night, like bridge repair or a whole world of things that cannot be done during the day. Those folks doing that work need communication and services too.
On top of that, the whole world is not one timezone.
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ok, but how is it better than a satellite?
rhetorical question, because i already know the answer. the satellite needs expend almost no energy to maintain position, whereas the aircraft needs to fly, and if something breaks it crashes. the main advantage is speed of deployment, thus lending itself as a temporary solution. but in the end, the satellite, unless completely unfeasible, is the superior solution.
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Re:"To show the world 'power of green technology'" (Score:5, Insightful)
Did Lindbergh, or Earhart do anything practical with their feats? Did Gagarin, or Glenn, or Armstrong?
Not really. But they did keep the public's mind on things which otherwise it may not have. This can be used as a diversion, but it can also be used to help drive technology forward.
Maybe some people decide to put solar panels on their house. Maybe it drives some investors imaginations into funding the technology (or the government) and advancing the art. Maybe some kid sees it and gets inspired. Years later he goes to Harvard and makes an advance that makes solar energy more feasible as an energy source.
My point is, you cannot sit in your basement being all cynical, stroking your neckbeard, and saying it doesn't work, so there is no point. People NEED to get out and try. They need to capture imaginations.
By the way, I do not mean to say that YOU have a neckbeard or live in a basement, but am talking about that general cynical attitude often found here. An attitude that I contribute to more often than I like to admit.
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their accomplishments actually did have practical value, showing it was possible to fly across the ocean. but they also didnt oversell what they did.
and that's essentially what im saying, is that these guys are overselling their project; that solar power as a practical propulasion system has almost no place in airplanes, because the energy density and engineering design required to use it simply arent there.
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I've heard a couple of interviews with this guy, and they are not overselling. Not by any stretch.
Theya re completelty upfromnt aout the realities.
People like doing things oin the edge. The same guy piloting the place also did hot air balloon trips..around the world.
" system has almost no place in airplanes"
becasue what they learn can't be applied elsewhere?
Stopping bitching becasue some is doing something adventurous.
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UM, billions of dollars comes from the practical application of technology developed for the Apollo mission. The Apollo mission as paid for itself more then 13 times over.
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UM you say that with a lot of confidence. More that 13 times over? How precise is that? I think you'll find it's pretty hard to enumerate the value of technology transfer from the space missions. Most of it was pretty good tech for, er, space. Not so much really bled out into other sectors. It's all pretty hard to quantify and any estimates are pretty woolly.
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There is a solution to this;
Use solar derived electricity to crack water, then use this combined with CO2 derived from whatever source you like to make jet fuel. Or just make biodiesel and refine that into jetfuel. If you can get away without having to meet the JetA specs it should not be that hard. Turbines are pretty flexible.
An article about this tech:
http://www.gizmag.com/air-fuel-synthesis-gasoline-from-air/24739/ [gizmag.com]
Yes, it is a very lossy process, but the energy density of liquid hydrocarbons is hard to
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Because turbines can be bought now, find me such a fuel cell that I can buy. Also storing H and O completely destroys the entire energy density storage of my plan. To make matters worse storing H2, is a huge PITA. It embrittles metal, leaks through everything and likes to pool in structures under roofs making it a hazard in buildings not designed for it.
Ornithopter (Score:2)
Solar powered aircraft (Score:2)
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that's pretty much what these "solar craft" are, a glider with wings big enough to hold enough solar panels for a teeny tiny motor. a non-practical farce that does not advance any state of the any art.
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Why is it a farce? hmm?
You people must be the most boring people in the world in your real life. Someone decided to do something adventurous. You people just whine.
They aren't doing making any claim, and the admit that you can't make a practical PV aircraft. These are people who like to travel the world in hot air balloon.
"that does not advance any state of the any art."
why does it have to?
That said, what cells are the using? what did they learn from wiring it up? How are the dealing with the harsh conditio
First? I think not. (Score:3, Informative)
http://www.solar-flight.com/sunseeker/index.html
During August of 1990, The Sunseeker crossed the country in 21 flights, with 121 hours in the air.
First this century, perhaps.
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They didn't mention that it was the first. There is one difference though. This solar plane can fly all night. The Sunseeker had no rechargeable batteries to do that.
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My first thought it that it might be the first non-stop cross-country flight. Not so.
"The cross-country tour will begin in the Bay Area and end in New York, with stops in Phoenix, Dallas and Washington DC in between. Solar Impulse will also land in either Atlanta, Nashville or St. Louis, with the plane and its pilots set to stay in each locale for about a week to ten days to talk about the project before moving on."
http://www.engadget.com/2013/03/28/solar-impulse-across-america/ [engadget.com]
Solar, mobile cell towers (Score:2)
I remember that this was a driving motivation for the technology. If a solar powered aircraft could launch cell tower processing and hold it aloft long enough on battery power (at night), then this would be a great idea. Especially in rural parts of the country where being able to shift positions to service local needs would be great.
Cheating (Score:1)
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Oh no, the Apollo missions launched from a southerly location in the US to increase the boost from the earth's rotation! The worthless cheaters! We haven't really put a man on the moon until we've launched from Maine, and picked up burgers at a drive-through in California on the flight out!
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Hey, look, the plane is awesome. I wish them luck, they will need it with 43 mph air speed.
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Alright, so a closer analogy would be saying Charles Lindbergh's non-stop transit of the Atlantic in a fixed-wing plane in 1927 was a sham, because he relied on the West to East jet stream --- Dieudonné Costes was the first to manage the more difficult Paris -> New York return flight in a heavier-than-air craft in 1930.
40hp = small motor scooter? (Score:2)
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Cute toy (Score:2)
Solar impulse is an over hyped, overly complex sailplane. That it uses new materials and can stay up all night is not an astounding accomplishment. The endurance record for an unpowered glider is over 56 hours and the distance record is 3,008 kilometers. Look ma no solar panels.
I get frustrated when I go to the Solar Impulse web site. It is like wading through vats of PR slime trying to find real information on how the aircraft really works. What are they trying to hide? Case in point, they say they have re