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A Solar Race Around the World
garzpacho writes "In Switzerland, two teams are vying to be the first to circle the globe in a solar powered vehicle--one team in a boat, the other in an airplane. The boat, a two person trimaran, is the brainchild of PlanetSolar, who hopes to circumnavigate the world In 80 days. Solar Impulse is fielding the single-pilot plane, which will be capable of taking off under its own power and flying all night. Both groups hope to bring greater attention to solar power, which they believe is more appropriate for alternative transportation than for automobiles."
Solar powered airplanes make a lot of sense, since they fly above the cloud layer. During a day flight, they're exposed to a lot of sun. If plane could use this energy to fly, it could cut down on the amount of fuel required to fly. Obviously you'd carry a full fuel load because you don't want to be caught in a bind if the solar cells fail, but imagine the savings if you could reduce fuel consumption by something like 30% during day flights.
Um, correct me if I'm wrong, but isn't the wind "solar powered"? So humankind has been circumnavigating the globe in "solar-powered" boats for many centuries!
Note: I know some wind currents are driven by the earth's rotation, but the earth rotates because it's orbiting the sun, right? Still solar-powered!
Wouldn't it be cheaper, faster, and more efficent to just use a sailboat instead of a solar-powered craft?
-- If you try to fail and succeed, which have you done? - Uli's moose
Ok I'm bored and am going to complain about a slashdot summary - yes I know...
"Both groups hope to bring greater attention to solar power, which they believe is more appropriate for alternative transportation than for automobiles."
What? That doesn't make any sense. How does a plane flying around the world or a boat floating around the world affect my commute? I don't know about you guys but solar vs gas isn't what stops me from driving a boat or plane to work. That would be cool, commutes would be fun instead of boring traffic, though I bet if everyone did it there would be crashes galore (especially the planes). Plus - why do we have to choose solar power or cars - what I want a solar powered car?
To be fair, one of the teams (boats), for some reason seems to make this comparison. I doubt there are many places where what they say is feasable. I don't care how effecient solar boats are - I can't drive one to work and I bet very very very few people in the whole freaking world can (of course, there are some - but then I bet alot of them do so to avoid traffic. It's no big deal to hit 60-70 in a boat and no traffic, not to mention the "fun" factor. I know I would do so in a heart beat).
As to what the parent article said - I don't see why this makes a difference in perception. I find the challenge pretty neat and plan to follow it (no problems there - great geeky/tech story), but making it happen doesn't really change my commute in any way. Jeese, a wind powered boat made a world wide traversal a few hundred years ago (continent to continent a few thousand years ago) - doesn't make wind powered cars any more useful or practical. A solar transversal isn't going to change much either. Again - not that I don't think this is useful or neat (anything that advances our understanding is worth it - I'm fully aware that solving thier problems may lead to some great advances and wish them great success - I want to see our dependancy on oil vanish for a variety of reasons), if thier goal is to raise perception of solar powered commute this isn't the way.
Back to geeking out - my bet is on the plane. Unless it's *really* slow I can't see it beating the boat. Especially given the plane can fly a fairly straight line (even with air space restrictions) compared to the boat. As to which will be made first - my bet is the boat. If the motor fails you still get to float, a plane loosing power is deadly.
------- Sorry about the spelling, I suffer from two problems. Dyslexia makes it difficult to spell well, lazy makes it
Or everyone might go to war, or we might as a result have to switch to nuclear powered cars and dump radioactivity everywhere.
Hybrids are an excellent half step because they provide incentive for car companies to improve electrical transmission technology, something we will need if we want to use practically any other energy source. If current theories about oil demand exceeding supply are true (and I can see no reason why they wouldn't be), oil (and thus transportation) prices are going to simply go up. Delaying that by 10 years might buy us enough to avoid world war III.
On the other hand, I haven't been particularly wowwed by hybrid performance, as our $12k car gets the same milage as a $45k hybrid. Personally I choose to commute by bicycle.
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sun -> plant -> food -> animal -> power
is WAY WAY less efficient than
sun -> solar panel -> power.
sun->plant is something like 1.5% efficient, and still needs to be converted somehow to perform useful work. Compare that to even crappy solar panels of 8% efficiency, where the output is something we can use directly.
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