Date: April 05, 2018 03:42PM
Steve Clayton Wrote:
> Dr. Trog
> Dr. Troglodyte wrote
> Date: April 03, 2018 07:08PM
> >Hello Steve Clayton; you wrote: ”…The
> average mans weight is approx. 185 to 200
> >This statement references no informed
> source for the above assumption. Studies* indicate
> the body mass mean for “Non-elite”
> >>males at Giza during the Old Kingdom to be
> 62.2 kg (132.72 lbs), a negative difference of
> nearly 60 pounds [average] per
> >Calculations influenced by the posted
> information are approximately 31% in error.
> >*Egyptian Body Size: A Regional and
> Worldwide Comparison, Michelle H. Raxter,
> University of South Florida, 2011
> Hello Dr. Troglodyte,
> I am happy to have you chime in. The exercise is,
> to see how practical using an (shaduf) inverted
> lever, is when attempting to lift an average
> Pyramid stone. As the stone is 5,000lbs. (2.5
> tons) and the poll is 20 ft. long. The fulcrum
> point is at 75 percent. As you can see in the
> drawing below, converted to inches, it requires
> 1,666 lbs. to reach equilibrium. Using your
> ancient Egyptians @ 133 lbs., it would require
> 12.5 men hanging from the rope. Correct me if I am
> wrong, the Pyramid steps are only 2.5 - 3.0 feet
> wide. Placing a counterweight on one end, as used
> in a Shaduf, is impracticable, as you will need to
> lift that counterweight, using the opposite end.
> The levers mechanical advantage is now working
> against you.
> Possibly, there is some other method or
> combination, which would work better? If you only
> have 2.5 feet on on end, it drops down to 5 men.
> Still, you need to control the lift. The pole is
> over your head. How is that accomplished?
Hello Steve Clayton:
We have had a similar discussion previously. The general answer remains…
Here, specifically, a number of erroneous assumptions regarding the ”means and methods” have been made. Petrie (Corrected Great Pyramid Course Elevations and Plate 8) illustrates the largest course of the Great Pyramid, above the base courses, is the 35th (+/- 49.5 inches thick average). This course represents approximately 50% of the stone required for the entire Pyramid’s construction. Likely to this level earthen and mud brick ramps were utilized to maneuver (‘lift’) the bulk of the large core and casing stones.
Above the 35th course, the majority of the stone units are approximately one (1) cubit high [Petrie] and weigh approximately one (1) ton [see Smith’s ratio, h:w:l = 1.0:1.33:2.0 cubits]; approximately 45.77% less than the speculated 5,000 pounds above (”…5,000lbs. (2.5 tons)…” The employment of ‘Shadfu crews’ (assuming the application) would have been most productive above this level.
Regarding these proposed Shadfu crews, the presumption of a single crew, of any size, is lacking; as is the area of the necessary staging zones (”…steps…only 2.5 - 3.0 feet wide…”). Two (2), perhaps four (4), crews (working on two levels of +/- 1 cubit apart vertically) could potentially operate independent machines on a single stone, simultaneously. Staging zones, placed strategically, would enable transportation at numerous locations on the structure.
Hi Dr. Troglodyte,
> Above the 35th course, the majority of the stone units are approximately one (1) cubit high [Petrie] and weigh >approximately one (1) ton [see Smith’s ratio, h:w:l = 1.0:1.33:2.0 cubits]; >approximately 45.77% less than the >speculated 5,000 pounds above (”…5,000lbs. (2.5 tons)…” The employment of ‘Shadfu crews’ (assuming the application) >would have been most >productive above this level.
Ref: An Egyptian Cubit = 20.6"
Switching over to 1 ton stones, would be a 60% reduction in weight, ie. 2,000lbs. See below: 286 lbs. of force, is better, especially if they employed a counter weight. The counter weight, still needs to be lifted each time, for re-attaching another stone. Let's say a 100lb. counter weight. This is more reasonable, though we still have a 52 degree incline, with only a 20.6" (Egyptian Long cubit) shelve. This is not enough room to stand on and/or work. If the pole runs down the center of the sheIve, can you walk to the other end, which is now only approx. 10" to maneuver. Are we now claiming the casing stones were only 20.6 " high, to match Petrie's estimate? And besides, how did they lift all the casing stones? The casing stones negate 5 men crews. Were the casing stones only 20.6" tall, or did they stack the cubit stones on top of each other? That should be visible, as most of the casing stones are missing.
Edited 1 time(s). Last edit at 07-Apr-18 15:36 by Steve Clayton.