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!
2007-09-05 00:16:38 · 4 answers · asked by Lena 2 in Science & Mathematics ➔ Engineering
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.
2007-09-05 01:46:44 · answer #1 · answered by Yoho 6 · 0⤊ 0⤋
For the fan, you would be better off
running the fan direct from the flywheel.
(Why accept the inefficiency of the generator
and motor.)
With the energy you could comfortably provide
by hand squeezing a lever, you'd only be able
to run a pretty small fan though.
2007-09-05 05:50:19 · answer #2 · answered by Irv S 7 · 0⤊ 0⤋
Military Grade Tactical Flashlight - http://FlashLight.uzaev.com/?iytm
2016-07-10 22:38:03 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Your heading mentions an l.e.d., yet wikipedia talks about an incandescent bulb.
They're completely different devices.
2007-09-05 13:22:06 · answer #4 · answered by dmb06851 7 · 0⤊ 0⤋