Tag: engineering

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Ancient Web: Douglas Self Collected Vehicles With Not Enough Wheels

The history of transportation contains a surprising number of inventors who looked at a normal vehicle and decided the main problem was that it had too many wheels.

Visit Douglas Self’s N-wheel vehicle pages

Douglas Self’s Museum of Retro Technology documents those decisions with the same mixture of engineering curiosity and dry commentary that runs through the rest of his site.

The result is a gallery of machines that tried to balance, steer, stabilize, or simply survive with fewer contact points than common sense might recommend.

Engineering by subtraction

The collection branches into monowheels and related machines where the rider may sit inside or around a giant wheel, as well as stranger arrangements that blur the line between bicycle, car, gyro vehicle, and mechanical dare.

Some concepts were serious engineering projects. Others look as though their inventors reached the prototype stage before asking the obvious question.

What happens when you brake?

That is the fun of Self’s museum.

It does not treat failed or eccentric technology as useless. A bad transport idea can still reveal what engineers were trying to solve: weight, stability, traction, steering, compactness, mechanical simplicity, or the dream of doing with one wheel what everybody else required four to accomplish.

The pages also preserve the visual evidence that makes these designs understandable. Patent-style drawings, old photographs, captions, dates, and short technical notes let the visitor compare solutions across eras.

Self’s larger Museum of Retro Technology is full of similar branches where engineering wandered somewhere interesting even when industry eventually chose another path.

That is a particularly good fit for the web.

A printed encyclopedia has to justify the space spent on an unsuccessful one-wheel automobile. A personal website can give it an entire page because the author thinks it is fascinating.

CacheRat’s 1,967 Ancient Web Domains research list includes specialist technical sites because they preserve the roads engineering did not take, not only the machines that won.

Four wheels became ordinary.

Fortunately, the people who disagreed left photographs.

Return to Douglas Self’s unusual vehicle archive

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Ancient Web: NiagaraFrontier Documents the Summer America Turned Off a Waterfall

For several months in 1969, one side of Niagara Falls was mostly switched off.

Visit NiagaraFrontier’s dewatered American Falls chronology

The page documents the temporary dewatering of the American Falls from June 12 through November 24, 1969, when a cofferdam diverted most of the American channel toward Horseshoe Falls so engineers could inspect the exposed rock face and talus.

It is one of those historical events that sounds exaggerated until the photographs and day-by-day notes start piling up.

A geological experiment at tourist scale

The project grew out of concern about erosion, rockfalls, and the long-term appearance of the American Falls. Congress authorized study work, the International Joint Commission became involved, and engineers eventually created the dry conditions needed for drilling, mapping, rock sampling, and slope investigation.

The chronology records construction details, survey work, drilling platforms, debris removal, tourist-access plans, and the practical problems of working beside one of the world’s most famous waterfalls.

It also preserves the grim side of exposing a riverbed. Human remains were recovered from the talus after the water was diverted.

Visitors eventually received limited access to part of the dry channel through a controlled walkway. For a short period, tourists could stand on ground that was normally under the Niagara River.

That makes the page useful in several directions at once: civil engineering, geology, environmental history, tourism, regional history, and the politics of altering a major natural landmark.

The photographs matter, but so does the chronology. A dramatic before-and-after picture cannot explain why a drilling platform appeared on a certain date or what engineers were measuring there.

Static local-history pages often preserve exactly that connective tissue.

CacheRat’s 1,967 Ancient Web Domains research list contains many sites where local researchers documented events too specific for broad history books.

NiagaraFrontier turns a bizarre photograph—an almost-dry waterfall—back into a sequence of decisions, machines, workers, tests, and dates.

Return to the 1969 American Falls chronology

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Ancient Web: HDTV Primer Modeled TV Antennas Instead of Trusting the Box

Antenna packaging has always had one technical weakness: the marketing department gets to print numbers on it.

Visit HDTV Primer’s antenna comparison page

HDTV Primer took the problem in a different direction. Rather than trusting manufacturer gain claims, the site’s author modeled a long list of commercially available TV antennas and published graphs showing how their performance changed across channels.

The page dates to October 2009 and reads like somebody got annoyed enough with antenna advertising to build the comparison they wanted to see.

Raw gain, net gain, and the part the box leaves out

The models were produced with NEC-4/EZNEC4-style antenna simulation software. The site explains why modeling can be useful: physical measurements are affected by surroundings, while a simulation can compare antennas in controlled free-space conditions.

More importantly, the page distinguishes between raw gain and net gain.

Raw gain describes how much energy the antenna captures in a direction. Net gain accounts for power lost because the antenna and transmission line are not perfectly impedance matched.

That difference produces some wonderfully inconvenient graphs.

The site compares indoor loops, log-periodic designs, Yagis, four-bay and eight-bay arrays, old Channel Master antennas, Winegard models, Antennas Direct products, VHF/UHF combination antennas, and rabbit ears. Several discontinued models remain in the charts, which has made the page more useful with age rather than less.

There are also practical discussions of beam width, side nulls, VHF performance from nominally UHF antennas, and why some published gain figures should be treated cautiously.

This is old-web technical culture at its best: not a product roundup, not affiliate links, and not a single “best antenna” answer.

It is somebody showing the curves.

CacheRat’s 1,967 Ancient Web Domains research list contains many specialist pages where the useful thing is precisely this kind of stubborn measurement and explanation.

The antennas have changed. ATSC has changed. The underlying RF problems have not.

Return to HDTV Primer’s antenna comparisons

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Ancient Web: The Test Card Gallery Remembers When Television Had to Show Its Work

Before television channels filled every unused second with programming, shopping, trailers, or somebody shouting about politics, they sometimes showed the machinery.

Visit The Test Card Gallery

Darren Meldrum’s site collects the tuning signals, test cards, clocks, captions, and other engineering images used by broadcasters when there was no normal program on the air.

These pictures were not decorative placeholders.

They were tools.

A picture designed to reveal what was wrong with your picture

Test patterns gave engineers and television repairers a stable visual target for checking geometry, aspect ratio, focus, convergence, grayscale, color response, resolution, alignment, and other parts of the broadcast chain.

The famous BBC cards are only one branch of the subject. The gallery also reaches into ITV material and test images from other countries and systems.

Some patterns are mostly circles, lines, gratings, blocks, and frequency wedges. Others became cultural objects in their own right because viewers saw them for years during off-air hours and trade transmissions.

Contemporary web references show the gallery was already being passed around online by 2000 as a place to find old BBC and international test patterns. That detail matters because the site is now preserving two histories at once: the broadcast engineering material itself and an early-web community that thought these technical screens were worth collecting.

They were right.

A test card captures the assumptions of a television system in one image. What resolution mattered? What shape should the picture be? How should circles appear? What tones and colors needed checking? What did a broadcaster expect a technician to diagnose from the screen?

CacheRat’s 1,967 Ancient Web Domains research list includes pages like this because ordinary technical artifacts are often the first things official histories omit.

The programs got archived.

Somebody also needed to save what appeared when there was no program.

Return to The Test Card Gallery

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Ancient Web: The University of Illinois Put Concrete Into a Web Course

Concrete is so ordinary that it takes a materials-science website to remind you how weird it actually is.

Visit the University of Illinois concrete module

The module was developed and revised during Materials Technology Workshops at the University of Illinois at Urbana-Champaign from 1993 through 1995. University professors, high-school science teachers and undergraduate students worked on it as a curriculum aid for teaching materials science and technology.

The resulting site is much more than a definition of concrete.

It contains historical timelines, scientific principles, laboratory activities, a glossary, equipment grids, quizzes, references, videos, and classroom exercises. Teachers were explicitly encouraged to use the whole module or lift individual experiments from it.

A construction material becomes a chemistry lesson

One section starts by asking students what concrete actually contains and why it hardens.

The answer leads directly into hydration: water reacts with cement so crystals form and interlock, binding the aggregate into a solid mass. From there the module asks why concrete is stronger in compression than tension, how setting can be accelerated or slowed, and what materials belong in the mix.

Then it gets gloriously specific.

Students are asked to brainstorm concrete applications ranging from roads, bridges, dams and sewer pipes to canoes, caskets, missile silos, nuclear-waste containment, furniture and even proposed lunar-base applications.

The module’s age is visible in some infrastructure statistics and projections, but that does not erase the educational design. The valuable part is the sequence: start with a familiar material, break it into components, explain the chemistry, test it in the lab, then connect the science back to things students physically encounter.

The project also preserves a particular moment in early educational publishing. This was classroom material translated onto the web before online courses became software platforms of their own.

CacheRat’s 1,967 Ancient Web Domains research list contains many university pages like this where the original teaching structure remains more interesting than a modern redesign would be.

The concrete module still teaches because the material science underneath it has not become obsolete.

A sidewalk remains chemistry with gravel in it.

Return to the concrete module

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Ancient Web: Mulsanne’s Corner Explains Race Car Aerodynamics

Mulsanne’s Corner opens with the line “Answering the questions that no one else is asking,” then backs it up with enough race-car engineering material to make a casual Le Mans fan regret clicking during lunch.

Visit Mulsanne’s Corner

Michael J. Fuller’s site says it was created on August 1, 1998. The layout still recommends an 800Ă—600 screen resolution. The contents, meanwhile, range across decades of prototype racing: Audi R8 and R10, Bentley Speed 8, Toyota GT-One, Porsche 962, Jaguar XJR-14, Nissan prototypes, Panoz, Courage, Lola, Cadillac, Peugeot and plenty of cars that require a fairly committed motorsport brain to recognize.

The car pages are only part of it.

There are engine sections, interviews with drivers and engineers, historical pieces, technical regulations, scale-modeling references, Le Mans trap-speed data, and a race-car aerodynamics database.

Numbers instead of adjectives

Motorsport writing can turn into a fog of “aggressive aero” and “advanced design” very quickly. Mulsanne’s Corner is useful because it often gets specific.

The archive includes downforce and drag figures, aero balance, chassis regulations by year, technical drawings, development history, and explanations of concepts such as diffusers and wing endplates. One long-running feature asks why the Mercedes-Benz CLR became airborne at Le Mans in 1999.

The site also preserves rulesets that would otherwise be annoying to reconstruct. Its chassis-rule index stretches through years of ACO, FIA and IMSA regulations. For somebody researching why a particular prototype looks the way it does, that context matters.

And somehow this is not merely a fossil. The homepage shows updates in 2026.

What a specialist site can become

This is one of the best arguments for letting a personal website become absurdly specific.

No general automotive publication is likely to maintain a quarter-century cross-reference between obscure prototype chassis, historic rules, aerodynamic data, interviews and engineering notes. A focused independent site can.

That specificity is also SEO without the embarrassing part. Search for a particular chassis designation or technical question and there is a good chance the useful page is already sitting here.

Mulsanne’s Corner is one stop from CacheRat’s larger Ancient Web research corpus.

Explore the 1,967 Ancient Web Domains research list

If the phrase “1993 IMSA GTP chassis rules” sounds interesting rather than alarming, you have found your website.

Explore Mulsanne’s Corner

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Ancient Web: The Jet-Powered Beer Cooler

Some old websites preserve important standards or vanished software. This one preserves a man building a jet engine because his beer was too warm.

Visit the Jet Powered Beer Cooler

Simon Jansen’s page dates the project to 2001, and the premise is laid out with the kind of clarity modern product teams spend three meetings trying to achieve: an all-day session in the shed requires beer, and warm beer is unacceptable.

Ice was apparently insufficient. Refrigeration was apparently too ordinary. Jansen remembered that an expanding liquid draws heat from its surroundings, looked at an LPG cylinder, and arrived at the obvious next step.

Burn the gas through a homemade jet engine.

Extremely unnecessary engineering

The engine used a car turbocharger for the compressor and turbine, with a homemade combustor completing the arrangement. Jansen then used the rapid LPG consumption to chill the cylinder sitting in water with the beer cans.

According to the page, the engine could run up to 100,000 RPM, with exhaust temperatures around 500°C and noise above 125 dBA. After roughly five minutes, the beer went from 11°C to 2°C.

There was also a PVC pipe involved at one point.

It went badly.

The page became popular enough to hit Slashdot in July 2001, prompting Jansen to add a few notes for the sudden audience. They include a recommendation against using the same technology to cool an overclocked AMD processor and the compact update: “Sorry Mum.”

This is exactly the kind of thing the personal Web was good at. A person had an idea, documented the build, took pictures, wrote down what failed, and published it without first determining whether it had a scalable market.

Was it essential knowledge? No.

Was it useful engineering documentation mixed with personality, photographs, physics, and glorious misuse of workshop equipment? Absolutely.

The broader CacheRat Ancient Web list contains 1,967 sites from this same archaeological dig: serious references, technical archives, personal obsessions, and pages that mostly exist because somebody thought the Internet needed them.

Explore the 1,967 Ancient Web Domains research list

The cooler page is still online, complete with the warnings, measurements, bad PVC decision, and plans for an afterburner/sausage sizzler.

Read the Jet Powered Beer Cooler page