http://www.outdoorlanternsonsale.com/dynamo-led/
mechanical LED flashlights?
According to wikipedia (http://en.wikipedia.org/wiki/Dyno_torch), a mechanically powered flashlight (or dyno torch) has a device called the flywheel that can store energy. From this, the user squeezes a handle to operate a small dynamo which supplies an electrical current to a miniature incandescent bulb for it to operate.
My questions are:
1. How much energy does it store in the flywheel?
2. How much energy do we produce every time we sqeeze the handle?
3. Is possible for this mechanism to generate enough energy (with a few modifications if necessary) to make a mechanically powered hand held fan (ex: http://a248.e.akamai.net/f/248/5462/2h/amplestuff.safeshopper.com/images/w0fks5v.jpg)?
Much thanks!
1. the energy is stored in the spinning of the wheel. Kind of like when you coast in your car. The real power is coming from the magnet rolling over the copper coils making a generator.
2. Very little. But if you made the setup better with real bearings and precession gears you could pull a lot more. Maybe around 1/4 watt.
3.Not even close to making the power needed to run a fan. Maybe again with a precession setup. Then i believe you would still have to use the hang pump to charge a battery .Then run the fan off the battery after you pumped it a number of times. More along the lines of hand powered radios.
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