> I guess I wasn't clear when I wrote my questions. What I wanted
> to know was how did they keep the water from leaking out of the
> causeway? What material was used? Were the causeway bottom
> and sides mortared? Slathered with tar? Stones aren't
The Funiculars have, for lack of a better description, have a keel. It is slightly wider and taller than 1/3 the width of the track. I estimated the causeway platform to be 9-10 feet wide each. You would not want the entire bottom surface to come into contact with the causeway, as that would only increase undesirable friction. If you look closely, you will see the same shape and size in the Funicular/Barge pit.
As the Funicular makes it's way down the causeway, it has a front and back section, which allows an oil/water mixture to drain on the track. This would reduce the overall friction. The center section would be a pink grade of polished granite. I show it black? This is historical.
They likely used mortar, though the track did not need to be waterproof. Not when you are applying oil, an instant before you pass over that surface. The Funicular is not a run away train. It would always be under control, and progress no faster than a walking speed. The average walking speed is 3.1 mph. When you run those math figures, you are able to build the Pyramids in the time frame needed.
I will be happy to share those figures with you should you desire. The Funicular you are viewing is capable of moving over 100 tons. In this picture, there are 3 skids with 8 stones each. Each stone is 2.5 tons each, or 60 tons total. You don't see it in this picture, though this Funicular is also pulling
skids full of stones straight up the face of the Pyramid. Both the face of the Pyramid and the causeway are simply two incline plains, and the Funicular has more than enough power to accomplish both at the same time. In a dead lift, it is capable of 117 tons. Water is really heavy.
Post Edited (02-Feb-15 18:20)