> You obviously do not have the experience to
> understand the questions.
I would think I am doing quite well, thank you.
> How much rock do you cut away before you check?
Ah, I see here a question perhaps only a panel of Einstein dopplegangers could understand. Perhaps I am too stupid to understand what such a question is asking.
Here's my inexperienced attempt at responding to the question about an amount of stone removed before checking the work. (Wow, it's amazing I was even able to write the previous sentence.) :
The amount of stone removed is irrelevant. Only that when you lay one end of straight edge against the already-cut passage and the other end against the newly excavated portion, the straight edge would be angled away from the passage line. This would tell you more excavation is required. Continue excavating until the straight edge is straight.
Incidentally, Jon, have you ever used a straight edge?
> How do you know how much rock to cut away, you
> cannot project a line into solid rock.
Don't need to. See above.
> What is your datum?
> You cut some rock away check with the straight
> edge and square, You've overcut , what do you do
> glue some rock back in there?
Not necessary. There are overcuts (though small) in the passage. The passage is not laser smooth (which is the only way to qualify your conundrum). Google some pictures of it.
> The length of the straight edge is hugely
> Try this.. take a one foot ruler .. Draw a
> straight line one foot long. Slide the ruler along
> six inches, draw another line repeat fifty times.
> How straight is the 25 foot line. That's
> cumulative error.
Perfectly straight. Just came back from my shop having tried this experiment. No problem. Do you conceive of these queries with a mind's eye, or do you actually try them first?
> I think this is the whole point. Many
> egyptologists with virtually zero understanding of
> engineering techniques grossly underestimate what
> is necessary to achieve an end result.
I am neither an Egyptologist nor engineer. And argument from or against authority is so passe. Please, the questions you ask require a little bit of working knowledge. And yes, Jon, I am quite the handy carpenter.
> I don't know how to make shoes. If I need shoes I
> go ask a shoemaker. Shoemakers know everything
> there is to know about making shoes. I know
> nothing about making shoes. I have a great deal of
> respect for shoemakers.
How about people who use straight edges, squares and levels?