I typed a long reply to your posting, Nigel. Then I clicked "Post Message" and it disappeared into oblivion. I will try to summarise what I said:
Originally I thought the pivot log would work like an axle, but your idea of notched logs strapped to the back of the block is probably better. The pivot log could be fixed and the notches rotate around it until they reach some angle at which they slip off.
I also mentioned the unfinished obelisk at Aswan which was abandoned because it cracked while being quarried. The Egyptians were obviously confident that they could erect this 1100 ton stick of granite otherwise they would not have gone to all the trouble of quarrying it. Several attempts have been made to raise obelisks and one that I saw on TV some years ago used a pivot log lashed to the stone. The attempt was almost a disaster since the log slid on its track as well as rolling. Also, as the stone pivots, its centre of gravity moves beyond the pivot point and makes the descent much more difficult to control.
I am rapidly coming to the conclusion that we should keep things simple and just allow for slippage.
 Reply | with quote | Posted by Steve Gray
30th August 2003ce
12:34 |
Stone Shifting 2 (nigelswift, Aug 26, 2003, 17:00)- Re: Stone Shifting 2 (Jane, Aug 26, 2003, 17:16)
- Re: Stone Shifting 2 (Steve Gray, Aug 26, 2003, 17:46)
- Re: Stone Shifting 2 (GordonP, Aug 26, 2003, 20:44)
- Re: Stone Shifting 2 (FourWinds, Aug 27, 2003, 11:24)
- Re: Stone Shifting 2 (nigelswift, Aug 29, 2003, 09:10)
- Steve's idea to fix a pivot log under the stone (nigelswift, Aug 30, 2003, 08:24)
- Which Method? (nigelswift, Aug 31, 2003, 07:09)
- Pi in the sky (baza, Aug 31, 2003, 17:44)
- Re: Stone Shifting 2 (jimit, Sep 01, 2003, 19:39)
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Head To Head 
Do we Eliminate Slippage or Live with it? (nigelswift)