Greased metal on wet wood rails, making pyramids.

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Discussion Overview

The discussion revolves around the methods used by ancient Egyptians to move large stone blocks, specifically focusing on the use of wooden sleds with greased metal runners on wet wooden rails. Participants explore various theories and materials that could potentially reduce friction in this process, as well as the practical challenges involved.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that wooden sleds with flat greased metal runners on wet wooden rails could provide a low coefficient of friction, but question the efficiency of such a system.
  • One participant mentions a theory involving semi-circular wooden bits placed on the blocks to facilitate rolling, noting that they heard about this from a documentary, but expresses uncertainty about its validity.
  • Concerns are raised about human pushers or pullers potentially kicking up loose ramp material, which could increase friction and wear on the wooden rails.
  • Another participant questions how the wooden pieces would be secured to the blocks, suggesting the use of leather straps or other methods, and discusses the logistics of rolling the blocks onto flat surfaces.
  • A possible solution to the friction issue is proposed, suggesting the ramp could be paved with woven plant material or stone, and considerations are made about worker conditions, such as footwear and the placement of the ramp for shade.

Areas of Agreement / Disagreement

Participants express various theories and concerns, but there is no consensus on the most effective method or material for reducing friction in moving the stone blocks. Multiple competing views remain regarding the methods and challenges involved.

Contextual Notes

Limitations include assumptions about the materials available to the ancient Egyptians, the effectiveness of proposed methods, and the practical implications of human labor in the process.

Spinnor
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Of the materials available to the ancient Egyptians for moving large stone blocks, wooden sleds equipped with flat greased metal runners which might ride on parallel wet greased wooden rails gives a low coefficient of friction? It may not be easy to use such materials to make an efficient working system?

Are there other combinations of "common" materials which might have had a lower coefficient of friction?

Thanks for any help!
 
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Have you heard the theory about putting 4 semi-circular bits on each of the blocks and rolling them? I thought that was pretty clever though I have no idea if it's true or not. I heard about this on a documentary on TV. The people claimed to have found these wooden bits inside a pyramid.
PyramidRoller-05.jpg
 
One of many possible problems, the human pushers or pullers would likely kick up any loose ramp material onto the wooden rails and increase friction and wear? Unavoidable?
 
Q_Goest said:
Have you heard the theory about putting 4 semi-circular bits on each of the blocks and rolling them? I thought that was pretty clever though I have no idea if it's true or not. I heard about this on a documentary on TV. The people claimed to have found these wooden bits inside a pyramid.
PyramidRoller-05.jpg

That is clever! Can't see the weakness of such a system right away.
 
What is holding the wooden pieces on to the block? I bet taking a side off and rolling it onto the flat is a little scary!

If I recall correctly one theory is they used water and fine silt to create a grease.
 
Nihilist said:
What is holding the wooden pieces on to the block?
Possibly leather straps circling the wheel in a deep groove?
I bet taking a side off and rolling it onto the flat is a little scary!
The block could be supported on lengths of cordwood while the "wheels" and the dowels are removed, then the block rolled along on a series of cordwood logs serving as rollers.
 
Spinnor said:
One of many possible problems, the human pushers or pullers would likely kick up any loose ramp material onto the wooden rails and increase friction and wear? Unavoidable?

A possible solution, "pave" the ramp with woven plant material or use stone? Would workers have worn sandals or gone barefoot? Set the ramp in the shady north side of the partially completed pyramid for cooler workers and feet?

Thanks for any thoughts!
 

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