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Makes no account for the 2nd gallery-like void, discovered a few years ago. Most (maybe all?) GP construction estimates never seem to account for the internal voids, just stacking stones flat. And with the newly estimated 2nd gallery, no telling what else the GP has inside!!!😮

Any ramp theory must deal with the amount of work done against friction. The most efficient would be straight up the sides, or at least up a ramp much steeper than the commonly assumed small ramp inclinations. The work against gravity, mgH, remains the same, but the work against friction increases as the inclination decreases: WORK = m*g*H * [1+mu*cot(theta)], where mu = coefficient of friction and theta = inclination angle. Also, since sliding friction is usually less than static friction, especially when lubricated, a quick steady pull without stopping up the sides would require much less energy than a long intermittent motion up a gently sloping ramp. Of course, the force needed to go up a steep slope is greater, but force is just proportional to the number of workers. FORCE = m*g*[sin(theta) + mu*cos(theta)]. Of course, here I am assuming sliding motion. Rotational step movement is something else again.

I think the blocks on the outside of the pyramids are a cover up of whats inside, what would it look like without all the blocks covrring it up

27 years of ropes and wood ramps? What sort of rope and wood did Egyptians have to work with?

Yeah, getting the stones up the ramp is tough, but once you get the stones up how does the hydraulic life set the stones in EXACT place?

I've enjoyed both your videos...but you might want to look into using a spellchecker more often.

The granite blocks used for the ceiling of the kings chamber no doubt rose with the pyramid, one course at a time.

Do the other pyramids on the plateau exhibit an internal ramp😊

If you used ramps and ropes, then you would probably use a pulley system going up and over, and down the other side with a counterweight

Very interesting! I was wondering if there was a 3rd ramp to place the last triangular stone at the tip of the pyramid? Probably, to descend from the end of the pyramid, they used the same ramps that they ascended?

Multiple pulleys when dragging the blocks up would act like a giant snatch block would it not? What an amazing video!

I've always thought the sheer fact (yes quite literally a fact in this case) that a lot of the rooms/chambers in the various pyramids/temples/structures have objects/artifacts within them that are either too big or just about the same size as the tunnels leading to them kinda necessitates the internal structures/rooms being built first.

Super work Declan! Have there been chevrons discovered at 85m and 115m previously? Also, what is the filler material for the core so you think? Cheers, Kirk.

Yeah the more you think about it the shafts make sense for construction

With all due respect and not being a sensationalist... you are a fucking genius! This is the most thought-out, logical explanation for the construction of the great pyramid. My only regret is that you have but 2 videos to enjoy on TH-cam.

Imagine the pride these men felt constructing this wonder. You have just finished your harvest & the Nile has been bountiful again this season. You then head off with your son & two brothers for the journey to Giza. You are soon jointed by many others leaving their village - called upon to work on the pyramid for the earthly embodiment of the gods - the pharaoh. Pretty epic story to tell the grand-kids. 😂

If egyptians built the great pyramids theyd be extensive written evidence about how who why etc. There isn't. Also consider the fact that the only actual pyramid there's evidence egyptians built that comes close to the gyza ones is the bent pyramid, and thats a failed attempt. I dream of the day the truth is finally acknowleged, that many of the big ancient civilizations who we credit as the first organized societies only developed in the ruins of much older forgotten ones. Ie. Aztecs, incas, Egyptians .etc trying to copy the construction styles and reusing the materials of ruins they settled in for their own cities. Cheers.

The top portion does not works.

What logs and ropes and handle 80 ton blocks???? Clearly there more to the picture that what history tells us. They had some kind of advanced technology that we dont understand

What is the mistake in this theory? It is very logical. The logic says, use the least energy. Using the body of the pyramid as the ramp is very smart, and logical since you do not have to build than later destroy outer ramp.

Megafauna ofcourse jeez...

The great void is real!

The problem with the mystery of how pyramids were built was that it was always attempted to be answered by historians and not engineers. Here we have an engineer who applied physics to explain why steep ramp was used and a simple, yet effective construction method that makes a TOTAL sense and it is pretty much proven now by the discovery of the internal ramp. Internal ramp clearly explains the position of every chamber. Simply wow Sir

One guy applied physics and great amount of simple logic and has solved the mystery alone - I love the internet haha. This is the most plausible explanation ever, construction was enormous but had to be fairly simple - sort of cut and cover.

Quite simple, rope, roller's and sweat.

Hey , i am a retired construction engineer. The way i would do the pyramid is to go straight up the sides using a counter weight method. I would use 30 crews on the east and on the west sides. My estimate is it took 20,000people, 12 years to build, Its the confirmation of the high civilization of ancient Egypt.

But as the block gets higher less men would be able to pull the load up until only two guys are left. Unless they used the post method and walked down the stairs as they pulled it up.

Dude just randomly throws out the most logical great pyramid construction techniques on all of youtube and then just peaces out, lol.

Elevated knowledge with a catchy soundtrack.

Great! You made the most brilliant video about the construction of the Great Pyramid of Khufu on TH-cam. Your hypothesis is the best I've ever seen! It is completely plausible from a structural, logistical, and archaeological point of view. Please make more videos about your construction hypothesis for the Great Pyramid (and other pyramids of the 4th dynasty). The world needs to know about your hypothesis

And what is the effect of using the Nile to pull the strings

I've a theory that they used big tug boats tied to the blocks using canals around the pyramids to lift them

Great work, totally consistent with muon scan. The only question is: how did they put in place the pyramidion?

Awesome video man! 5:55 matches perfectly with this: th-cam.com/video/Mx2i5o55xxQ/w-d-xo.html

What about the last 30 meters?

they should have left the internal ramp. makes it so you can go to the top.

One way to truly be sure is just to redo it ourselves

Seems more probable than an spiral internal ramp. This method also allows clear sighting down the sides to ensure the pyramid does not go out of alignment as construction nears the top.

Question: why did they gradually closed the grand gallery instead of immediately with a smaller ceiling ? The must have used it for a longer period while being closed gradually ? Any ideas ? That is why probably Houdin's theory uses the counter-weight method.

Yes!! Brilliant. This is exactly what I had in my mind too when meditated around the Houdin's theory yesterday. Reconstructing the pyramid with animation course by course helps alot to solve this because it's visible. The visual guide is priceless. I don't think this is the final solution , but we are pretty close. Hopefully new evidence will be found in the coming years and will shine a brighter light on this issue.

It is quite possible

how to build the pyramid in 9 months: th-cam.com/video/nlchEBh7RHM/w-d-xo.html Your thoughts on this?

Mesmerized by the animations,thanks,and also I think it's a sound theory

The order of operations seems logical. However, it wasn't a tomb, nor was it built by the Egyptians 4,500 years ago. It dates to the last Ice-Age. Humans have been around for 100,000s of years. Gobekli Tepe and many other sites show megalithic construction 11,000 years ago. There is no reason to think earlier civilizations didn't have the ability to do so. We know the Egyptians did not have the tools.

Jean Pierre Houdin's theory 2011 is the best to date. This video is very good but Houdin shows many signs of proof of the Grand Gallery being a Counterweight pulley work area for the lifting of the Kings Chamber granite stones

You might be onto something with your theory. I'm going to bookmark this video and come back a few years later.

great explanation, i think they could use a counterweight sistem. Just a box that can be filled with sand at the opposite end of the stone can make the work much easier, so you dont need 1200 men too pull the rope.

I still couldn't understand shit tbh (at least how the blockas ate maneuvered into place which is the basic action of ptramid construction).

I think they used wood scaffolding

This is a very good theory particularly with what the actual evidence on site suggests. However, there are a few things that still need addressing: 1.) the top 30m of the pyramid is a difficult proposition. The video shows some scaffolding & either tracks or ladders without any explanation for how those blocks would have been hoisted or lifted & placed. I have a hard time imagining 2.5 ton blocks being pulled up a 55 degree slope with so little room for manpower. 2.) the casing stones were not addressed in the video at all. I guess the assumption is that they were placed bottom to top as the main construction was completed. But recent studies of the top 30m of the khafre pyramid show a top down pattern which excludes any external ramps. But also makes it hard to imagine how the blocks were brought up to the very top and then placed moving down. Maybe the top section of the pyramid was constructed in an entirely different pattern than the base and center sections? 3.) the survey marks around the pyramid show nothing other than an 8 acre planned layout. Also, the pre construction leveling of the surface is finite. This indicates that the full construction was planned in advance & the internal structure with an “as needed” size idea may not be viable. I do think the internal ramp with steeper slopes idea is far more likely than anything else. Just a few fine points that still need answering.