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Gravity transit ?

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Gravity transit ?

Postby sciencegirl » Fri 18 Aug 2006, 10:46:46

Imagine if you had one pole 100 meters high and 10 miles away you had a pole 15 meters high. Then you have a cable that connects to both poles. You could attach a cabin on the cable and gravity would move you 10 miles to the 15 meter pole. You wouldn't burn any fuel. Does anyone have any other idea's for peak oil transportation ?
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Re: Gravity transit ?

Postby emersonbiggins » Fri 18 Aug 2006, 10:50:44

Are you serious? What about the energy expended to scale the poles, much less build them?

It'd work great if all you ever wanted to go was downhill. :roll:
Last edited by emersonbiggins on Fri 18 Aug 2006, 10:52:06, edited 1 time in total.
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Re: Gravity transit ?

Postby Niagara » Fri 18 Aug 2006, 10:51:34

$this->bbcode_second_pass_quote('sciencegirl', 'I')magine if you had one pole 100 meters high and 10 miles away you had a pole 15 meters high. Then you have a cable that connects to both poles. You could attach a cabin on the cable and gravity would move you 10 miles to the 15 meter pole. You wouldn't burn any fuel. Does anyone have any other idea's for peak oil transportation ?



2 questions:

1) What if I buy a round-trip ticket for your gondola?

2) Is there an elevator to get me up the 100 meter pole, or do I take the stairs?
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Re: Gravity transit ?

Postby sciencegirl » Fri 18 Aug 2006, 11:03:24

You take the stairs, and the cost for the poles is a one time charge, but the cable would have to be replaced once a year for saftey reasons. Then you have a reverse gondela for the trip back.

The only difficult part is hoisting up the gondela for the return trip, but I am sure a pulley system would make it much easier.

As for what I would charge, maybe 1/2 of what bus fare is.
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Re: Gravity transit ?

Postby emersonbiggins » Fri 18 Aug 2006, 11:10:58

$this->bbcode_second_pass_quote('sciencegirl', 'Y')ou take the stairs, and the cost for the poles is a one time charge, but the cable would have to be replaced once a year for saftey reasons. Then you have a reverse gondela for the trip back.

The only difficult part is hoisting up the gondela for the return trip, but I am sure a pulley system would make it much easier.

As for what I would charge, maybe 1/2 of what bus fare is.


edit: how old are you?
Last edited by emersonbiggins on Fri 18 Aug 2006, 11:16:14, edited 1 time in total.
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Re: Gravity transit ?

Postby sciencegirl » Fri 18 Aug 2006, 11:15:37

In a peak oil world, lardasses would not exist for very long anyways.

I wonder though....If you were to put wings on the gondela if it would reduce the stress put on the cable.
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Re: Gravity transit ?

Postby rogerhb » Fri 18 Aug 2006, 11:19:11

$this->bbcode_second_pass_quote('sciencegirl', 'I')magine if you had one pole 100 meters high and 10 miles away you had a pole 15 meters high.


So how to you maintain the tension so the cable does not touch the ground in the middle?

If the cable does droop you can only go 5 miles.....

Does this also cater for the curvature of the Earth? And friction? And stretching of the cable? And temperature changes of the cable?
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Re: Gravity transit ?

Postby sciencegirl » Fri 18 Aug 2006, 11:28:33

You just need a few more poles for support, that would increase the cable tension.

WHY ask how old I am. Are you trying to say I am being stupid. If it wasn't for idea's we would still be living in the stone age. People thought the lightbulb was stupid, or the train was stupid.

At least I am trying to create solutions.
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Re: Gravity transit ?

Postby emersonbiggins » Fri 18 Aug 2006, 11:29:13

Thanks, but I'll just drive.
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Re: Gravity transit ?

Postby emersonbiggins » Fri 18 Aug 2006, 11:34:50

$this->bbcode_second_pass_quote('sciencegirl', 'Y')ou just need a few more poles for support, that would increase the cable tension.

WHY ask how old I am. Are you trying to say I am being stupid. If it wasn't for idea's we would still be living in the stone age. People thought the lightbulb was stupid, or the train was stupid.

At least I am trying to create solutions.


OK, so you're 14.

You think you're putting a flag anywhere with this idea?

If stairs were so enjoyable for everyone to ascend, the elevator would have never been invented. The energy expended just from climbing the stairs negates any gain from your gondola's trip downhill. You might as well just walk the whole way.
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Re: Gravity transit ?

Postby sciencegirl » Fri 18 Aug 2006, 11:40:38

Okay so you'd rather walk 10 miles rather than climb 100 meters of stairs, my your intelligent. Hope you packed a water bottle with you. You'll need it.
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Re: Gravity transit ?

Postby doomed » Fri 18 Aug 2006, 13:08:59

$this->bbcode_second_pass_quote('', 'I')f it wasn't for idea's we would still be living in the stone age


All the ideas in the world aren't going to mean a hill of beans when humans have used up all the cheap energy resources like we are in the process of doing. We'll be back to that stone age soon enough. :lol:
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Re: Gravity transit ?

Postby Pops » Fri 18 Aug 2006, 14:01:26

I guess the point is there is no free lunch.

You will expend more energy overcoming gravity climbing the stairs, friction in the mechanism and wind resistance than you would in simply walking.

Surprising though it may seem, a million years of evolution has created a very efficient mode of transportation without our intervention.
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Re: Gravity transit ?

Postby clueless » Fri 18 Aug 2006, 14:04:38

Doesn't this fall into the category of "perpetual motion theory", it is impossible to get more energy out of an action than is put into it ?

Is she trolling Pops ?
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Re: Gravity transit ?

Postby Zardoz » Fri 18 Aug 2006, 14:37:18

$this->bbcode_second_pass_quote('clueless', 'I')s she trolling...?

And we're responding...
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Re: Gravity transit ?

Postby mgibbons19 » Fri 18 Aug 2006, 14:44:09

I thought gravity transportation was falling off of something. Ouch.

As others are pointing out, the energy saved going down would be less than expended going up. Think hiking up to the top of the mountain to ski down. fun. but not efficient.

edited for: doh!
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Re: Gravity transit ?

Postby Spartan2 » Fri 18 Aug 2006, 15:08:56

Isn't this the same thing as cable cars?
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Re: Gravity transit ?

Postby sciencegirl » Fri 18 Aug 2006, 15:24:18

It's like cable cars with an engine. My point with 2 poles is that even if one pole was only a few meters higher than the other pole, you can probably even seperate them 100 kilometers, you can travel by gravity, you would build up more and more acceleration as you travelled. Assuming that you had a few additional poles for support.
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Re: Gravity transit ?

Postby sciencegirl » Fri 18 Aug 2006, 15:25:11

like cable cars without an engine...sorry, my bad. I should have proof read
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Re: Gravity transit ?

Postby clueless » Fri 18 Aug 2006, 15:33:02

How about changing your name to ScienceFICTIONgirl ?
Last edited by clueless on Fri 18 Aug 2006, 15:40:47, edited 1 time in total.
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