Dr. Troglodyte wrote
Date: April 03, 2018 07:08PM
>Hello Steve Clayton; you wrote: ”…The average mans weight is approx. 185 to 200 lbs…”
>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 >>constructor.
>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?