Yes Stokes, the experiment you linked where you said this proves that Petries findings were wrong. The same experiment thats completely different to your Russian video results. So which one is the true and correct result because they are all different.
This is a blatant lie show me where I linked to anything pertaining to Stokes.
There it is again the personal jibe. You can't discuss anything without resorting to personal jibes trying to make out that anyone who disagrees is stupid.
No I said you were inept and I will cease making such comments when you no longer provide the ammunition.
I did recognize the core and I showed you that it wasn't produce by a flywheel drill as you claim but a machine with a split copper pipe.
That core was produced by Nikolay Vasyutin the same ones that actually do use a flywheel and the results are completely different to your pic and Petries core. I mean you are calling me inept and stupid for not recognising things and yet you cannot recognise that your own core undermines your whole arguement
Once again here is the core from the same Russian scientist using the flywheel.
View attachment 358267
View attachment 358265
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They look completely different. The core you linked was made by a machine drill and a split copper pipe which caused the light uniform and horizontal (not spiral) lines. Its a completely different method and result which is bad science.
Here we go yet again.
First of all, a comparison between the 2010 and 2016 tests.
Both experiments used a split tube design and yes, the 2010 used a low speed drill as the drive, so why did I use 2010 image?
The answer is very simple the 2010 image is much more detailed because it is a close up image allowing analysis.
So while you babble on about the use of a low speed drill instead of a flywheel invalidates the analysis, it is the copper and abrasive that largely determines the striation pattern.
The main point however is the average pitch/turn is 0.075’’ which using Dunn's logic is way beyond the performance of any modern granite cutting drill of around 0.004”/turn which is complete nonsense.
As mentioned previously you cannot use pitch as an indicator for feed rate when the SD is high as it is for the Petrie sample.
Hence Dunn’s conclusion is emphatically wrong.
There it is again, this extreme mocking of different views like they are stupid. You now begin all you posts with such language and many times I end up showing you were mistaken.
Ah Petrie also said the same and Dunn was just confirming this. So we have two people coming to the same conclusion. What do you mean by Dunns drilling equipment. Dunn did not do any drilling. He was confirming Petrie's findings that due to the spirals it could be estimated that the drilling of core 7 had a fast feed rate.
The spiral shows the drill cut into the granite 1 inch for every 60 inches of spiral thread. Thats how they estimated the feed rate.
Like I said 10 times now its not the pitch that is determining the feed rate but that the grooves spiral down. Each spiral lands lower on the core than a horizontal striration. So each rotation is cutting in deeper than a horizontal line. The pitch may vary slightly between the two but its the spiralling of the pitch that is what is measured as to the feed rate because the spiral shows a deeper cut into the granite than a horizontal pitch.
So 10 horizontal pitches will not go down the core as low as 10 spiral pitches regardless of the variations in the pitch because the spiral cuts and landing lower down the core each turn. I have explained this several times now.
The most startling feature of the granite core Petrie describes is the spiral groove around the core indicating a feed rate of 0.100 inches per revolution of the drill.
Most people know of the great construction achievements of the dynastic Egyptians such as the pyramids and temples of the Giza Plateau area as well as the Sphinx. Many books and videos show depictions of vast work forces hewing blocks of stone in the hot desert sun and carefully setting them...
www.ancient-origins.net
I’ve heard it all before, and confirms you don’t know what you are talking about.
Firstly since Dunn assumes the pitch is fairly constant, the equation
Feed rate = Pitch x RPM applies hence the feed rate is very much dependent on the pitch.
Secondly your description as vague as it is, is describing pitch and the larger the pitch the more it will deviate from the horizontal which should be self explanatory and not require your use of word salad involving spiralling pitches and horizontal pitches.
Your doing it again calling me stupid and what I point is rubbish before you even prove your point and most of the time your wrong.
So your having a go at me for pointing out bad science. You cannot provide results to prove your case from tests that may use completely different methods or equipement to the Egyptians. Thats bad science.
Your also not acknowledging that a machine did this and not a flywheel which is another inconsistency with method. So far you have posted the Russian experiments and Stokes experiments all using different methods and equipment ie machine, bow drill and flywheel drill and split and unsplit copper pipes. Thats not good science.
In case you didn’t understand the first time around, simply showing one method where the pitch/turn which greatly exceeds the limits of modern granite drilling tools is enough to show Dunn’s conclusion is nonsense.
You claim the split copper pipe doesn't cause the nicks and yet logic tells us that an open cut has edges on both sides which will nick the sides when it wobbles. Otherwise please provide evidence that the split will not cause the nicks. You make unsubstanciated claims.
Your 'logic' is based on willful ignorance copper has a Mohs hardness 2.5-3.0 and granite 6-7.
I'm sure even a primary school kid would understand copper will not nick granite.
You are also very quite about the machine that was used and not a flywheel and that the results from the actual flywheel show a completely different result to your pic.
Repeating myself again it only requires one method to debunk Dunn's hypothesis.
Ah so now your appealing to fixed point cutting just like Petrie and Dunn said. Yet you were attacking them as whackos. The abrasion of Corrundum will not stay fixed for continious spiral cuts and will quickly be ground into pulp.
If corrundum did cause the deep cuts then why do other tests with corrundum not produce the same horizontal lines as your pic.
Here are cores using corrundum as the abrasive that have not left lines like your core.
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Expedition Magazine | Ancient Egyptian Stone-Drilling
Now we have gone back to quote mining refer to post #11 for the response.
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Click to magnify and you will see not lines like your example and this is from the same scientists using the flywheel method and corrundum abrasive. If you look at the corrundum abrasive its like a paste and the grains are tiny and cannot cut deep grooves up to 1/100th to 1/500th of an inch.
Anyway regardless of what rationalisation you want to use the proof in the results which show its completely different to your example and there are very few lines on the core and its mostly abrased away as would be expected.
Where did you get this image from it looks nothing like 2016 sample.
The striations in the hole are particularly striking and makes a mockery of your argument the 2016 experiment does not produce deep grooves.
And I have explained to you that the corrundum does not cut deep into the granite as it is grit it quickly is ground into pulp. The fact all the other results using corrundum do not produce the lines or deep cuts but rather light stratches is evidence for this above.
Not all of them. You make out you absolutely know the way you dictate to me what is and is not. So far your evidence does not support your claims.
The copper tubes had fixed cutting points so of course there will be copper. The copper tube was the tool as there was no other metal to use as the drill. But as the evidence shows there must have been
fixed cutting points embedded in the copper that could penetrate deep and cut through quartz as easily as feldspar.
Loose corrundum aabrasive will not produce the same results as shown in the many tests using corrundum.
As Petrie stated.
This essential principle- that the cutting action was not by grinding with a powder, as in a lapidary's wheel, but by graving with a fixed point, as in a planing machine-must be clearly settled before any sound ideas of the methods or materials can be arrived at.
Reading Tool Marks on Egyptian Stone Sculpture
Maybe points made from hard minerals like corundum, microcrystalline varieties of quartz or other gemstones could be embedded in another material like copper or wood and used as a graver. All of these hypotheses require further investigation, including the consideration of contemporary gemstone carving technologies around the region.82
Reading Tool Marks on Egyptian Stone Sculpture - Rivista del Museo Egizio
For someone who plays the victim card with claims of being labelled stupid, you are insulting the readers and my intelligence with this blatant piece of deception.
Be very careful what you write as the search function will catch you out.
You have made it very clear there is absolutely no evidence of copper being used in drilling holes in granite and when the evidence shows otherwise suddenly there is a 180 degree turn as if it supports your position.
What a pathetic turn of events.
There you go again. You keep belittling me and I keep showing your name calling is unjustified. Even if I was wrong you don't call people who truely believe what they do as deluded because it disagrees with your view. I have shown that you are wrong several times but I don't say your deluded. This debate has been going on for over 100 years and there is no resolution so how can you be calling people deluded when there is no absolute answer.
Except as I jhave said many times now that the pitch was spiral and deep cutting through quartz deeply up to 1/100th to 5/100 of an inch deep in Petries core number 7.
Your examples and others I have linked are light strirations and horizontal surface lines. Completely different.
No they are not completely different, given the high quality image of the striations inside the hole from the 2016 experiment which are clearly not light scratches and I might be able to analyse.