GordonP
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Re: Stone shifting 4
Sep 07, 2003, 21:16
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The mysterious Aubrey holes? Now that would be interesting.
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BlueGloves
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Re: Stone shifting 4
Sep 07, 2003, 21:52
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Why not try a little one ?
http://www.themodernantiquarian.com/image.php?image_id=10325
There's plenty of B & B around (etc).
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Steve Gray
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Re: Stone shifting 4
Sep 08, 2003, 01:32
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Maybe we can get a full-time job re-erecting the stone circles of Britain. ;-)
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Steve Gray
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Re: Stone shifting 4
Sep 08, 2003, 01:39
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Aw come on, goffik, cheer up. Wasn't quite sure how to interpret that one, that's all.
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goffik
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Re: Stone shifting 4
Sep 08, 2003, 07:11
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Heh! Sorry about that - Awnly jokin and all that..!
It's one of them there moments when you want the "delete message" facility!
I just felt silly, slightly under the spell of wine..!
I never ever mean any offence, so hopefully none is ever taken
G
x
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nigelswift
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Re: Stone shifting 4
Sep 08, 2003, 07:29
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"I never ever mean any offence..." I'm exactly the same, so it leads me to say stuff on here thinking people can see the smile on my face but sometimes they can't and they think I'm being aggressive. People here are such prats...
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goffik
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Re: Stone shifting 4
Sep 08, 2003, 07:40
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Heh!
Said with a smile, I hope! ;o)
I know what you mean - oh, the troubles with modern communication, eh?
G
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nigelswift
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Re: Stone shifting 4
Sep 08, 2003, 09:05
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So you think getting the stone to walk the plank would be highly dangerous? Fair enough. Although I have to say the concept didn’t frighten me at all as I thought “100 yards away, behind a wall, I’m bound to be OK”.
But is there some part of stone rowing worth looking into, i.e. is there any mileage in some sort of controlled descent? If there was a post or posts placed in the hole, leaning at a pretty steep angle, and you rowed the stone forward until it was almost ready to topple, then by placing a very small weight on it you could cause it to tip slowly until it was lodged against the pole, halfway through it’s descent. At that point, by putting more weight on it, and/or pulling the pole a little more upright, you could eventually cause it to complete it’s descent, and it would have no choice but to be guided into a near vertical position because of the presence of the pole on it's right and the lip of the hole on it's left, certainly enough to make the hauling-up process easy. It seems to me if you got the pole angle right, and it was strong enough, you could get a high degree of control and predictability. In particular, you could eradicate most of the slippage that normally kicks in in the second part of the stone's descent, and forces the tower to be fairly high..
If this is garbage, put it down as a valid contribution to brainstorming, as it’s an aspect we haven’t discussed.
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nigelswift
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Re: Stone shifting 4
Sep 08, 2003, 09:08
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Steve, you and Gordon have totally lost me. A diagram would be great.
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Steve Gray
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Re: Stone shifting 4
Sep 08, 2003, 10:23
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Suppose that you have a large block of stone 1 metre thick, just balanced over the edge of the tower so that its centre of gravity is 1mm beond the edge. It would very slowly begin to topple, but as soon as it starts to move, the centre of gravity moves too because it is half a metre above the pivot point. By the time the stone has rotated by 30 degrees, the centre of gravity has now moved from 1mm to 251mm, so now you've got a considerable turning moment. This makes it very difficult to arrange any kind of controlled descent if you want to end up with the stone at 70 degrees or more.
The angled timbers are a nice idea, but would have to be very strong if you intended them to stop the angular momentum of the stone. Presumably the top end would be supported by the tower. So the tower would have to be able to withstand the side load (7 tons static, but considerably more when stopping the rotation) without the benefit of a vertical load to hold it all together. This is the problem I was discussing with Gordon in relation to his idea of levering off the tower. I prefer the idea of letting the ground stop the stone, and that's why I wanted an angled entry slope to the hole so that the stone could enter deep into the hole while still rotating. Fortunately the Earth has enough mass to stop a 40 ton stone without too much ado. ;-)
I have to go out now, but I'll try to do post some drawings of the proposed methods later on.
Keep up the brainstorming. It's good to have different ideas in the melting pot. Even if an idea is not immediately applicable, it may give rise to one that is.
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