Cladking:

Egyptologists theorize(d) that the sub-chamber was the original design prior to any pyramid being constructed. Once built then there was a design change...a theory and a very week one at best.


a) To begin...the tunnel-grotto was dug from the top downward...not reverse; likewise with the descending passage.

b) The cross sectional view from east to west of the grotto and its associated tunnel shows it dropping vertically and parallel to the descending passage. But, from the north-south view it bends southward and finally connects to the D passage near its base.
The connection is unique...allowing hot "used" air to pass along the roof of the descending passage up toward the entrance being replaced by colder air dropping down from the grotto and its tunnel...IOW a self-ventilating system.
That's good to a certain point...to the end of the D passage.

When the horizontal section was dug then ventilation equipment had to be available, otherwise the sub chamber would have never been completed.

c) There are several important factors associated with this segment of G1 that have never been addressed simply because we "assume" that the designers of the site knew little math. Fortunately the designers gave us an indication that an association definitely exists between this pyramid and the other two.

1) The angular length of the descending passage, measured along its floor, is 201 Rc; equal to the width of G3 (201.3Rc)...!

2) The horizontal distance from the centerline of the pit in the sub-chamber to the descending passage entrance is 205.8Rc; equal to the half-width of G2 (205.6Rc)...!

Two measures referenced from the entrance of G1 and both relate to the base measures of G2 and G3...yet these two pyramids that are “yet-to-be-constructed” are assumed not to have been in the original design.

That's only the beginning of what archeologists will claim as "coincidental" measures of the sub-chamber design.

Is it not odd how Petrie provided these fixed reference points without realizing their connection to the other two structures? His numbers tell us the story immediately...they are simple facts...no theories required.

That is what the Giza group is all about...we have to look deeper and analyze closer.
No "shooting from the hip" theories allowed.

Fact:
The grotto is mathematically positioned with reference to the "completed" pyramid...that's why its location at the surface was set north of the lower connection point to the DP.


Best.
Clive