PHOTO AND SKETCHES

  • A full scale Egyptian Pulley, limestone, with 12 inch diameter roller, was successfully tested duplicating a 5,000 pound weight lift (52 degree incline) and is shown in the below PHOTO.
  • The first four SKETCHES below show how the stone block on a wood sled could have been pulled up and unloaded at the top.  The first sketch is a simplified cartoon showing the basic operation of the Egyptian Pulley (but does not illustrate loading/unloading the stone).
  • Sketches 2 and 3 illustrate a likely stone unloading technique in which a locking "key," holding the Pulley in (horizontal) position, is removed as the stone/sled reaches the top edge. The stone/sled is then simply pulled over the edge and the Pulley transitions horizontally (in the direction the rope is pulled). 
  • Sketch 4 shows the use of a counterweight and two Egyptian Pulleys to lift the stones during the last stage of construction (with relatively little surface area on top).
  • Sketch 5 is an illustration showing a grooved "rope roll" (approximately 14 inches axial length) found at the Step (Djoser) Pyramid.  The Step Pyramid predates the Great Pyramid by more than 100 years.


PHOTO and SKETCHES

Photo

Sketch 1

Sketches 2 and 3

Sketch 4

Sketch 5