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AkradantousAdoxastous
 United Kingdom
Electric Dirigible Printer Friendly Version
Standard airships use helium in order to be buoyant. And hot air balloons use heat to reduce the density of the air. However, it seems plausible that electrically charging a volume of air would result in it self-repelling leading to increased pressure. If the air is sealed in a balloon, the increased pressure would lead to increased volume and therefore decreased density.
So using a simple spark plug, or any electrostatic generator capable of ionising the air, to ionise the air within a normal balloon will cause it to rise. Hopefully should be easy to test this theory, and if it works it can easily be scaled up to blimps.
Why is this better than a normal dirigible? Because helium is rare, expensive and it leaks.
Reward: This idea is free to use, if it works.
 

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Tarde
 Australia
Solar powerd shade drone Printer Friendly Version
This Is just to keep sunlight for those walking in the sun and wish for shade in unshaded areas.
Pros: Self sustaining, long-lasting when needed.

Cons: Noisy, weight/power outage.


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Steve
 Austria
GPS Shirts & License Plates Printer Friendly Version
I'm sure this has happened to others as well: You're in an unknown neighborhood, basically lost, but there are a few cars, bikes or even pedestrians around who seem to know where THEY are going. If one of them had the same goal as you, you could simply follow them. But then, how would you know...?
Here's where GPS shirts and license plates come to play. The license plate idea is kind of easier to implement: This would be a display beside your actual license plate which is attached to your real GPS in the car, and so the folks behind you can see where you're going.
The shirt would work similarly, with the place you're heading to displayed on the back of the shirt (either automatically via GPS, or to be inserted manually). Of course, it is nice to imagine this idea in an analogous and visual way - nowadays, however, you'd be more likely to implement it virtually: Create an app, have people enter their routes, and off you go.
Reward: One of those.
 

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