Engineer
Christopher Dunn
Christopher Dunn looks at ancient Egyptian monuments through the experience of a manufacturing engineer. Where a visitor sees a statue or a stone chamber, he asks about processes: how a surface was produced, how its geometry was controlled, what a tool left behind, and what practical function could explain an unusual arrangement of components. His most ambitious answer is that the Great Pyramid was an energy-producing machine.[1]
Three concepts orient his work. Precision concerns the degree to which an object approaches an intended form. Reverse engineering attempts to infer a process or function from a finished object. Resonance describes the strong response a system can have to excitation at particular frequencies. Dunn combines these concepts into a picture of ancient technical achievement. The resulting argument has two main levels: questions about manufacturing, and a proposed power system. Evidence for unusual workmanship does not automatically establish the second.
An engineer's route into Egypt
Dunn's professional background includes machining, toolmaking, industrial lasers, and aerospace manufacturing. His official biography describes an interest in the Great Pyramid stimulated by Peter Tompkins's Secrets of the Great Pyramid. He developed his interpretation through visits, measurements, photographs, and earlier survey records.[1]
The perspective can be valuable because manufacturing leaves a material history. A craftsman's decisions may survive as a corner, groove, asymmetry, or unfinished surface. Such features can be overlooked when attention concentrates on inscriptions or a monument's artistic appearance.
However, modern expertise supplies a set of questions rather than automatic knowledge of ancient answers. Different combinations of labour, materials, tooling, and finishing can sometimes produce comparable results. An engineer's assessment becomes historically stronger when it is joined to archaeological context and an explicit comparison of competing processes. Dunn's most useful challenge is to make the manufacturing problem concrete enough to investigate.
Lost Technologies and the question of capability
Lost Technologies of Ancient Egypt concentrates on the engineering characteristics of monuments and artefacts. Its presentation highlights large statues, hard stone, and features Dunn regards as evidence of capabilities underestimated in conventional accounts.[2]
The important question is what advanced means in a particular case. It might refer to sophisticated measurement, specialised craft knowledge, an effective abrasive process, or powered machinery. These possibilities are not equivalent. A community can develop an exceptionally demanding craft without possessing the same industrial infrastructure as a modern factory.
Consequently, the best investigation begins with the object rather than the adjective. What are its dimensions? Which areas are finished? How much variation occurs across its surface? What sequence would account for both the polished result and the remaining mistakes? This approach allows impressive ancient skill to be recognised while keeping the inference to a particular machine open to testing.
Reading a tool mark
Dunn's illustrated material draws attention to cut surfaces and apparent tool traces at Egyptian sites. He treats some forms as clues to sawing, drilling, or machining processes that deserve closer study.[3]
A tool mark is potentially informative, but its interpretation depends on scale and context. A photograph may omit the larger surface on which a small groove occurs. Later weathering or repair may alter its appearance. The final polish can also remove evidence of earlier stages, leaving only a partial record.
An effective analysis therefore needs documentation that another investigator can examine: the object's identity and location, lighting and scale, a three-dimensional record where useful, and proposed processes capable of producing the observed combination of features. Demonstrating that one modern tool produces a similar mark establishes a possibility. Establishing that ancient makers used that tool requires further evidence. The distinction is central to responsible reverse engineering.
Petrie's core and an instructive suspension
One influential discussion concerns a drilled stone core described by Flinders Petrie. Dunn connected its reported grooves with a proposal for ultrasonic machining. In a public account responding to criticism, he explained that disagreement about whether the marks were spiral or separate rings led him to suspend his assertions pending a sufficiently detailed personal examination.[4]
The account is important because it records a contested observation at the foundation of a larger inference. If the groove is interpreted differently, an estimate of tool movement or feed rate can change. Photographs taken at different angles may themselves complicate the comparison.
Dunn's temporary suspension should not be described as either a permanent abandonment of his entire theory or a conclusive vindication. It demonstrates that a technical argument can depend on something as specific as the geometry of one mark. The strongest continuation would publish reproducible measurements and show how each proposed manufacturing process compares with the entire surface.
The symmetry of monumental sculpture
Dunn's study of Ramesses statues compares faces and crowns through photographs, reversed images, and geometrical overlays. His own presentation describes some measurements as approximate and calls for further three-dimensional scanning.[5]
That qualification matters. A photograph is affected by perspective, lens properties, lighting, and the position of the camera. An apparent match can be suggestive without constituting a complete metrological examination. A carefully registered three-dimensional model can help distinguish symmetry in the object from symmetry introduced by an image comparison.
The underlying subject remains fascinating. Reproducing a demanding form across a large stone object involves choices of reference, checking, and correction. Even if the process proves to have relied on skilled handwork, explaining how it was organised can reveal substantial technical knowledge. The enquiry need not depend on the prior conclusion that the method exceeded every known ancient capability.
Experiments and the abrasive question
Experimental archaeology offers a way to compare these possibilities. Denys Stocks has published work on sarcophagus manufacture and on granite-working tests at Aswan, examining how tools and procedures can work in practice.[6]
The relevant process is more complex than asking whether a soft metal blade can directly cut a hard stone. Abrasive particles, tool shape, pressure, motion, wear, and the removal of debris can all matter. An experiment can establish that a process is feasible, measure its performance, and identify the traces it produces.
It should also state its limits. A demonstration using a small sample does not automatically explain a monumental project. Nor does the failure of one reconstruction eliminate every version of an abrasive technique. The useful comparison is between specified processes under documented conditions. Dunn's challenges are most productive where they lead to that sort of experimental engagement, including results that force either side to revise an assumption.
The Great Pyramid as an integrated system
In The Giza Power Plant, Dunn interprets the pyramid's chambers and passages as components of a technical installation. His model links Earth's vibrations, acoustic resonance, and a proposed conversion into microwave energy.[7] He assigns the Queen's Chamber a chemical role involving hydrogen production and interprets the shaft fittings as possible parts of a liquid-level control system.[12] These are proposed functions within his reconstruction, rather than identified ancient machinery. Dunn explicitly credits the local ancient population with construction; appearances in programmes about ancient aliens should not replace that stated position.[12]
This is a larger step than identifying precision workmanship. A well-made chamber can have mechanical or acoustic properties without having been built as a generator. The historical claim concerns intentional design, operation, and use.
A functioning system needs an energy source, a means of conversion, controls, losses, and an output with an identifiable destination. Its proposed ancient operation should also leave an archaeological setting: components, residues, maintenance, or associated infrastructure. Missing equipment can be a legitimate problem in reconstructing any ancient installation, but hypothesised missing parts cannot independently verify the machine they are introduced to complete. The power-plant proposal needs to be assessed as a whole system.
Resonators, chamber damage, and explanation
In “Following the Evidence,” Dunn gives an account of how features of the Grand Gallery and damage in the King's Chamber influenced his thinking. He proposes that slots could have supported resonating elements and considers whether damage might relate to an energetic event within the structure.[8]
The reverse-engineering approach tries to make several otherwise puzzling features belong to one explanation. That ambition is valuable: a theory should account for more than a single attractive detail. It should also distinguish its predictions from those of structural, constructional, and ritual explanations.
Resonance alone is not diagnostic. Enclosed spaces and solid bodies have characteristic responses to excitation. An investigation must show what excites the system, how strongly it responds, and whether the response can perform the proposed work. Evidence of damage also needs a documented sequence. The fact that a mechanical model can be imagined around an architectural feature leaves the historical function to be established.
What a working demonstration actually demonstrates
Dunn's website documents a fluid-switch model built for a television shoot. In that apparatus, liquid reaching particular contacts switched on a lamp. The description explicitly includes a battery and explains the substitution of a lamp for another component.[9]
This is an especially useful case for distinguishing types of demonstration. The model can illustrate a proposed switching principle. Its visible light does not demonstrate that an ancient pyramid generated the electrical energy, because the described circuit has a modern power source.
That observation does not make the demonstration worthless. Models can clarify mechanisms and reveal practical difficulties. Their value increases when the question they answer is stated precisely. A demonstration of switching, a demonstration of energy conversion, and evidence for an ancient installation are separate achievements. Educational videos should say which of them has actually occurred, allowing viewers to appreciate a successful model without inferring a larger result it was not designed to establish.
Tesla, stressed rock, and a modern extension
Giza: The Tesla Connection develops Dunn's later account of acoustics and energy. In his 2025 discussion, he connects his ideas with Friedemann Freund's investigations of electrical effects associated with stressed rocks.[10]
Dunn makes an important attribution explicit: the pyramid application is his own connection. He states that Freund's research was not inspired by the pyramids and does not present Freund as having demonstrated an ancient power system. That distinction should accompany any reference to the research.
The existence of an electrical response in a material raises an engineering question about usable output. It does not answer it. Scale, loading conditions, efficiency, duration, and collection methods all matter. A historically persuasive explanation would additionally need evidence that ancient builders intentionally employed the effect. Modern physics can suggest a mechanism worth investigating while leaving both the complete machine and its ancient use unverified.
A way to make the debate more productive
The most promising next step is a shared programme of measurement and experiment. Advocates could identify a small number of objects or features they regard as especially decisive, publish the relevant data, and state which results would count against their preferred process.
For manufacturing claims, this could mean calibrated scans, documented provenance, and reconstructions that compare surface form and tool traces together. For energy claims, it would mean a complete, measurable operating cycle with its inputs and outputs accounted for. These are editorial proposals for evaluating the arguments, rather than experiments carried out for this collection.
Dunn's work is valuable where it makes ancient technical achievement a serious question. It becomes less informative when the word precision is allowed to stand in for an entire missing technological history. A university treatment can preserve the force of his observations while asking the larger reconstruction to meet the demands of its own engineering vocabulary.
The question left with the reader
Dunn invites a different encounter with a monument: look for evidence of making and operation as carefully as for evidence of meaning. His perspective brings craftsmanship into the centre of the discussion and encourages respect for the complexity of working stone at exceptional scales.
The central unresolved issue is how far those observations carry his interpretation. Unusual workmanship may warrant additional study without establishing an energy-producing pyramid. A plausible modern mechanism may explain an effect without documenting its ancient use.
For Open Sky University, those distinctions make the subject richer. Readers can explore actual objects, specific manufacturing problems, and ambitious hypotheses together. Dunn's strongest legacy may lie in the precision of the questions he encourages: what was measured, what process could produce it, what experiment can discriminate between alternatives, and what would establish that the proposed technology belonged to the builders themselves?
Research notes and sources
Based on Dunn's public articles, illustrated studies, publisher material, and scholarly experimental records. No pyramid generator was built or tested for this essay. Full books, every documentary appearance, and unpublished measurement data were not reviewed. Analytical engineering tests proposed in the text are this collection's reasoning. Sources accessed 29 October 2026.
[1] Christopher Dunn, official professional biography and research history: https://gizapower.com/gizeh/about-chris-dunn/
[2] Lost Technologies of Ancient Egypt, publisher description: https://www.simonandschuster.com/books/Lost-Technologies-of-Ancient-Egypt/Christopher-Dunn/9781591431022
[3] Christopher Dunn, “Prehistoric Machined Artifacts,” illustrated primary presentation: https://gizapower.com/gizeh/articles/prehistoric-machined-artifacts/
[4] Christopher Dunn, “Petrie's Infamous Core #7,” including his account of suspending assertions in response to a contested observation: https://gizapower.com/gizeh/articles/petries-infamous-core-7-10-04-1999-2054/
[5] Christopher Dunn, “The Symmetry and Precision of the Ramses Statues”: https://gizapower.com/gizeh/articles/the-symmetry-and-precision-of-the-ramses-statues/
[6] Denys A. Stocks, “Stone sarcophagus manufacture in ancient Egypt,” Antiquity 73 (1999), 918–922: https://doi.org/10.1017/S0003598X00065704 ; “Testing ancient Egyptian granite-working methods in Aswan, Upper Egypt,” Antiquity 75 (2001), 89–94: https://doi.org/10.1017/S0003598X00052777 . Accessible abstracts and publication records consulted.
[7] The Giza Power Plant, publisher's account of the hypothesis: https://www.simonandschuster.com/books/The-Giza-Power-Plant/Christopher-Dunn/9781879181502
[8] Christopher Dunn, “Following the Evidence”: https://gizapower.com/gizeh/articles/following-the-evidence/
[9] Christopher Dunn, “Fluid Switch Model Build,” with its explicit modern battery-powered circuit: https://gizapower.com/gizeh/articles/fluid-switch-model-build/
[10] Christopher Dunn, response to Giza satellite-radar claims, dated 22 March 2025, including his discussion of Freund and Giza: The Tesla Connection: https://gizapower.com/gizeh/2025/03/24/results-of-satellite-based-synthetic-aperture-radar-sar-scan-of-the-giza-plateau/ ; publisher description of the 2024 book: https://www.simonandschuster.net/books/Giza-The-Tesla-Connection/Christopher-Dunn/9781591434610
[11] Kunihiro Morishima et al., “Discovery of a big void in Khufu's Pyramid by observation of cosmic-ray muons,” Nature (2017): https://www.nature.com/articles/nature24647
[12] Christopher Dunn, “Evidence of Ancient Electrical Devices found in the Great Pyramid?” (2011), primary statement of his hydrogen/control hypothesis and explicit attribution to indigenous builders: https://gizapower.com/gizeh/articles/evidence-of-ancient-electrical-devices-found-in-the-great-pyramid/
Biography: Christopher Dunn · gizapower.com