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Old 09-26-2008, 07:27 PM   #11
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Re: More zany ideas... compressed air and sleeping arrangements

Speaking of bicycle powered generators and such, you might want to take a peek at this. . . http://www.mrsharkey.com/forum/vwtp.php ... sc&start=0
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Old 11-07-2008, 01:23 AM   #12
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Re: More zany ideas... compressed air and sleeping arrangements

Quote:
Look in to manual pump-type faucets for RVs. You work a lever to get the water out of the tank......why pressurize?

I had a countertop hand-pump spigot -- the kind commonly found in RV stores. Major piece of junk. Absolutely last resort.

I now use a 12 V pump -- the standard RV type. Works great. I run it off a single deep cycle battery, and that battery lasted four people fine for a week at Burning Man -- we went thru something like 80 gallons. I have the pump hooked up with the light in the bathroom. Throw the switch on, and we have both light and water pressure. Switch off, and the system is inactive. As mentioned above, you can put an accumulator in the water line to keep the pump from bugging you with frequent cycling.

Electricity is powerful stuff. It takes a lot of muscle to generate an appreciable amount of it. At a nearby science exhibit, they have a hand cranked generator that powers a common household light bulb. I have to use both arms to get any real light out of it.

I once saw an old RV with a bicycle bolted to the back. Instead of a rear wheel, there was a 12 V alternator. Ought to work, but slowly!
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Old 11-07-2008, 03:17 PM   #13
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Re: More zany ideas... compressed air and sleeping arrangements


I like your creative thinking.

But starting a 200 HP engine to run its tiny little air brake compressor does not sound efficient to me. You don't get 200 HP worth of air charging. You only get what that little compressor can do -- maybe one HP worth -- wild guess.

Powering a small compressor OR generator with a small engine is more efficient, because the small engine is operating closer to its maximum efficiency.

And I'm not so sure it is a good idea to start an engine every day for just a few minutes. Starting a cold engine is very hard on it.

I do like the concept of "straight from compressor to water pipe". Sound thinking.

But your last item on this post, about an air motor to power a generator, will not work so well. As was mentioned in an earlier post, air motors consume large air volumes. My die grinder draws down my shop compressor tank faster than any other tool I have.
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Old 11-10-2008, 03:28 AM   #14
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Re: More zany ideas... compressed air and sleeping arrangements


Way in the back of my mind, a little voice is trying to tell me that the common Allison MT643 transmission has some sort of provision for a PTO. Try reading up on it.

Keep the batteries charged, make sure rain and mice cannot in thru the exhaust pipe, and just let it sit. Well, that's my thinking, anyway. I may be wrong. Wouldn't be the first time.
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Old 11-10-2008, 11:16 PM   #15
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Re: More zany ideas... compressed air and sleeping arrangements

hmmm you make me think......why not hook up a little windmill to your air compressor and hope that you're parked in a windy spot that keeps your airpressure up so you dont have to bike to often.
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