Ok. Thanks for the long explanation - and sorry to have doubted about your motivations. It's quite a lot to digest in a single read, so maybe I'll add more comments later on, as I understand all better.
I will most likely never in my life try that, so worry not about the risk, at least regarding me. I think everybody knows that lifting heavy weights and getting under them can be extremely dangerous. Even today with our modern cranes, steel chains and all that... there are deadly accidents now and then.
Still, I fail to undrstand the key issue (probably because I'm not too versed in physics or engineering). You say:
Quote
devised a safe working system of working the capstone near to balance to give me compound lifting. I now had a lift system that gave 100-1 against normal levering at 15-1, due to the cubic mass gain of the stone against its dimensions this now allowed me to lift 100+ tonnes.
I really don't understand how you change those proportions. I know though that famous sentence of... who was that Greek? Archimedes? Pithagoras? Well, whowever, the one who said: "give me a pivot point and I will move the Earth". So I do believe it can be done... but I fail to understand the logic. My fault probably.
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Regarding the use of oxen (and transport in general), I'd like to say the following:
1. About lubricating the path, as it's modernly done as (tolerated or not tolerated, unsure about the exact rules) "cheat" in Basque stone-hauling competitions, the key is to pur the lubricating agent after the oxen and before the stone, as the animals do naturally. Of course this allows only for a single group of animals working at one time and not for a "caravan" of stones. Anyhow, I just mention as a possibility. AFAIK, the animals don't seem to slip on the pebble road in any case.
2. A sufficiently organized/wealthy entity (such as the state, quasi-state or religious organization that created monuments like Stonehenge) could perfectly, I think, arrange, for successive groups of oxen to carry the stones by turns, so the real daily limit for transport can perfectly be of many miles. It's just a matter of organization (and of having enough cattle and drivers).
3. Another possibility could be the use of canals (or natural waterways where available). On first thought one could think that such elements if existent would be known (as the possible pebble roads and the like) but that's not necesarily the case. In a distant but related example, when reading on the Chalcolithic city of Zambujal (Torres Vedras, Portugal) some years ago there was no mention whatsoever about a canal, some years later I found
this site on its more recent excavations and it mentions (among other stuff) the discovery of a "marine branch" that seems to have been essential for the settlement. What I mean is that we don't know everything: just what we have discovered and nothing more and this may apply to waterways, simple pebble roads or whatever.