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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."
I was thinking about building an automated solar plane that could stay up for weeks, but apparently it's very hard to do with current tech. There was an article a while back about such a plane, but they cheated by using thermals(bubbles of hot rising air heated by the ground) for lift and only stayed up for a couple days. As the energy to weight ratio of batteries improves, it should become easier.
Solar Impulse is fielding the single-pilot plane, which will be capable of taking off under its own power and flying all night.
If you're flying around the world, couldn't you arrange it so it's always daytime?
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Didja take a look at that website about the solarplane? All kinds of mumbo about "pushing the envelope", and by the language, it's pretty clear that anything resembling construction is a *long* way off.
But, any dolt could take a nice, efficient catamaran, replace the sales with a solar rigging and a trolling motor, load the boat down with some MREs, and start sailing.
Not saying it'd be pleasant, but I'd rather sit on a Hobicat than try to get through the night in an ultralight plane knowing that battery life would just *barely* make it through the night, with almost no margin for error. (and yes, I'm a pilot)
The kind of aspect ratio they're talking about would be mighty difficult to fly, since it would be very prone to flutter, and the difference between the cruising speed and the stall speed would be almost negligable!
Not to mention having to be both very lightweight and also very strong...
Scary!
Better to fuel up a general aviation craft on butanol call it "green" and be done with it! Really, when you read up on it, butanol is some seriously cool stuff.
1) It mixes freely with gasoline
2) It burns like gasoline, in cars unmodified,
3) It can be made from corn, wheat, cheese whey, just about any agricultural product or byproduct.
4) It handles moisture much better than ethanol.
5) It's possible to extract more energy (in BTU) as butanol from corn then as ethanol.
Seriously, the fuel of the future for the United States is here, and it's butanol. (Bio-Diesel is probably more appropriate for Europe, where they have many more diesel cars than the US which is almost all gasoline-powered)
Just as green, and much easier on the pilot!
I have no problem with your religion until you decide it's reason to deprive others of the truth.
Unfortunately a trimaran covered in solar panels is the worst kind of boat to be in during a hurricane, because its got lots of non removable surface area and its very light. A friend of mine was on board his trimaran during Hurricane Georges in 1998 and he was flipped three times.
Sails and masts are likely to be damaged by the wind.
Sails can be removed, and masts are very strong. I was on board my boat during Hurricane Lenny and the strength of the mast and rigging was not an issue. In olden times with weaker rigging it might have been, but they used to take spars down when not in use.
It captures the attention of the masses, and somebody steps up and says 'I want one of those' and somebody else steps up and says 'I want one something like that' and somebody else steps up and says 'I want one of those!' and the manufacturing of solar panels goes into overdrive and the price comes down and the capability goes up and its affordable to make solar powered buses and the city does that and makes them free for use to cut down on the traffic fumes and all of a sudden your life is better.
Ok, its just the first step..
It's no big deal to hit 60-70 in a boat
Its quite a big deal to reach those kind of speeds in a boat. Its not like getting into a car and putting your foot down, think about what would happen to your car if there were 10cm bumps in the road, and 10cm bumps in the water is nothing.
What I'd like to see is an "open source" methodology.
If you want to make something happen in say, Linux, you can look at what someone else has already done, then tweak it to make it do what you need it to do. With our advances in bio-tech, surely there must be a future in bio-engineering some specific plant life to produce high amounts of usable energy. I know that there are bacteria that produce h2 etc. but the scale is insufficient.
What I imagine is, a plant that converts prodigious amounts of energy (ie bamboo can grow 6 feet in a day) and subverting that energy so that instead of producing growth, it produces a chemical that can be used to directly power an engine of some variety. An engine is defined as something that converts energy into work done.
In the end, we need a symbiosis to fulfill our transportation requirements. Back in the days, man used a horse or a cow, to pull a cart. The animal got its food from grazing grass which got its energy directly (but not completely) from the sun.
So why can't we follow that approach ? Utilise a very efficient system that nature has "designed" and subvert it to our own ends. After all, fossil fuels are only stored solar power.
Taking nanotech into account, it may be possible to create a muscle structure that when it is working generates an amount of electrical current. The muscle would get its "nutrition" from the chemical produced by the bio-engineered plant. The plant would get its energy from the sun. We could foster the initial growth of the plant in the ocean or tanks (for safety) much like an algae bloom, so we would only have to fill our "tanks" with a green goop once a month for example. The extra compounds the plant needs to survive (minerals etc) would be provided by the dead goop we have already used (think ginger beer plant). We still have to utilise the electrical energy more efficiently of course, but our motors are getting pretty good.
I realise this is all probably very naive, and I'm not a scientist in any way, at all ! But it seems to me that all our thinking has been towards shortcuts, ie. sun -> solar panel -> power instead of taking the natural route of sun -> plant -> food -> animal -> power.
We need to aim at creating a living system.
Maybe I'm talking out of my ninth planet, but the saying "haste makes waste" seems to apply as solar panels aren't very efficient.
Of course, you could say that my ideal involves many more stages and so is less efficient, but each stage would be as close to maximum efficiency as nature has got to already.
I'll get my coat.