Quotulatiousness

July 14, 2022

Frontier Blacksmith: A Day in the Life – Decorative Blacksmithing

Filed under: History, Technology, Tools — Tags: , , — Nicholas @ 02:00

Townsends
Published 26 Mar 2022
(more…)

July 12, 2022

Shoe Repair: The Work Of The Cobbler – Historical Buckle Shoe Repair

Filed under: History, Technology, Tools — Tags: , , — Nicholas @ 02:00

Townsends
Published 21 Mar 2022

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July 11, 2022

Canadians deserve better than “core network maintenance problems” for critical cell phone and internet services

Filed under: Business, Cancon, Government, Technology — Tags: , , , , — Nicholas @ 05:00

Our internet service provider, Rogers, suffered a major network failure early on Friday morning, taking down not just wired internet services, but also cable TV, and cell phone services and causing knock-on issues that utterly disrupted many emergency 911 services, government websites, banks (including ATM and point-of-sale terminals) and many more. I subscribe to both Rogers internet and Rogers cell phone services, but fortunately my wife has a different wireless phone provider so we weren’t completely offline all of Friday and most of Saturday. Michael Geist and his family weren’t as lucky:

Like many Canadians, I spent most of the massive Rogers outage completely offline. With the benefit of hindsight, my family made a big mistake by relying on a single provider for everything: broadband, home phone, cable, and wireless services on a family plan. When everything went down, everything really went down. No dial tone, no channels, no connectivity. Work was challenging and contact with the kids shut off. It was disorienting and a reminder of our reliance on communications networks for virtually every aspect of our daily lives.

So what comes next? We cannot let this become nothing more than a “what did you do” memory alongside some nominal credit from Rogers for the inconvenience. Canada obviously has a competition problem when it comes to communications services resulting in some of the highest wireless and broadband pricing in the developed world. Purchasing more of those services as a backup – whether an extra broadband or cellphone connection – will be unaffordable to most and only exacerbate the problem. Even distributing the services among providers likely means that consumers take a financial hit as they walk away from the benefits from a market that has incentivized bundling discounts. Consumers always pay the price in these circumstances, but there are policy solutions that could reduce the risk of catastrophic outages and our reliance on a single provider for so many essential services.

First, there is a need to better understand what happened and why. Rogers CEO says the problem lies with maintenance to the core network, which caused some routers to malfunction. But that’s just tech talk. Canadians deserve answers that explain not only how this happened, but how we find ourselves in a position where malfunctioning routers at one company cause a nationwide payment system to go down, government services to be taken offline, and emergency services to be rendered inaccessible. It is one thing for my household to make a mistake, but another for Interac to do so. That means conducting an open CRTC process into this outage alongside a Parliamentary hearing on the broader issues since this is a matter that requires both regulatory and political response. There is no need to wait: these hearings must happen this month with the goal of identifying the scope and source of the problem along with potential policies that might mitigate future harms.

Neither the CRTC nor the current government has shown much inclination to challenge the big telcos. CRTC Chair Ian Scott has reversed years of a consumer-focused Commission into one more comfortable supporting the big providers, while the government has been far more interested in sabre rattling or shaking down Internet companies than taking on big telecom. Yet as we were reminded on Friday, the linkage to the availability of essential services – payments, health care, government services – runs through the telcos, not the Internet companies.

This is the second object lesson in concentrated power in a small number of government-approved hands this year. Our first wake-up call was when the government prompted chartered Canadian banks to cut off some of their customers from all financial services even though no crimes had been committed and no charges were laid. It’s not clear how many people were affected, but arbitrarily denying people access to their bank accounts and credit cards should have rung alarm bells for many people. Now, we’ve been shown how dangerous it can be to allow a very small number of companies to divide the mobile phone and internet service market between them and use the power of government to keep out potential competitors. Will enough Canadians notice?

July 10, 2022

Seven easy steps to fix military procurement

Filed under: Bureaucracy, Military, Technology, USA, Weapons — Tags: — Nicholas @ 03:00

CDR Salamander wrote these for the US military, so some of them are far out-of-scale for tiddlers like the Canadian Armed Forces, but the spirit is still valid and relevant:

1. No weapon system presently under production will be allowed to stop production until its replacement is under production itself.

2. Acknowledge we have lied to ourselves for decades actual magazine requirements in war (use “new” lessons from the Russo-Ukraine War for the tender to save face — whatever works) — and accelerate/restart production of everything from ASW weapons to strike weapons of all types.

3. Acknowledge that we do not have enough weapons — specifically anti-air and land attack — on our warships. Every war proves this and recent experience tells us this.

4. If I take away your access to satellite VOX & DATA and you cannot navigate and fight, you are not a wartime asset and your funding sent somewhere useful.

5. Accelerate capacity for repair away from fleet concentration areas, preferably afloat. Maximize production of sealift and begin the process to replace the C-5M.

6. If your combat unit does not have organic, robust unmanned ISR under the command of your unit’s commander, you are worthless in the war to come and you will have such a capability by FY25 or you will be disestablished.

7. Pass the Salamander Bill: no General of Flag Officer shall, for a period no less than 5-yrs from retirement date, receive compensation of any kind or anything of value from any publicly or privately held company that does business with the federal government, nor shall they serve in any non-paid positions with same.

Yes, #7 is important. If you have not realized why in 2022, you are part of the problem.

June 27, 2022

High Altitude Research Project and the Martlet Launch Vehicles; Gerald Bull’s dream of a space gun

Filed under: Cancon, History, Military, Space, Technology, USA, Weapons — Tags: , , , , , , , — Nicholas @ 04:00

Polyus Studios
Published 26 Jun 2022

Support me on Patreon – https://www.patreon.com/polyusstudios

In 1968, 7 countries were operating satellites in orbit, while only 3 countries had the ability to launch one themselves. But they were on the verge of being joined by a Canadian university. Starting in the early 1960s, Montreal, Quebec based McGill University developed and began testing an ambitious concept to place small satellites into orbit. It was the culmination of decades of pioneering work across multiple fields. It was the High Altitude Research Project and the Martlet orbital launch vehicle.

Music:
Denmark – Portland Cello Project
Your Suggestions – Unicorn Heads

Chapters:
0:00 Introduction
0:28 Bull’s early career
3:00 Birth of the Program
7:47 Getting HARP off the ground
10:52 Martlet 1
13:26 Early Martlet 2
15:41 Martlet 3
18:05 Enhanced Martlet 2s
21:40 Other HARP Guns
24:19 Quest for an Orbital Capability, the 2G-1
27:53 Satellite Delivery Model, Martlet 4
30:27 Advanced gun research
31:30 Hard times for HARP
32:30 Bull’s Ambition Gets The Best Of Him
35:28 Legacy of the HARP Project

Look at Life — The Jumping Jets (1965)

Filed under: Britain, Germany, History, Military, Technology, USA, Weapons — Tags: , , , , — Nicholas @ 02:00

PauliosVids
Published 20 Nov 2018

The revolutionary vertical take-off capacity of the RAF Kestrel.

[Wikipedia: “The Hawker P.1127 and the Hawker Siddeley Kestrel FGA.1 are the British experimental and development aircraft that led to the Hawker Siddeley Harrier, the first vertical and/or short take-off and landing (V/STOL) jet fighter-bomber.

“Development began in 1957, taking advantage of the Bristol Engine Company’s choice to invest in the creation of the Pegasus vectored-thrust engine. Testing began in July 1960 and by the end of the year the aircraft had achieved both vertical take-off and horizontal flight. The test program also explored the possibility of use upon aircraft carriers, landing on HMS Ark Royal in 1963. The first three aircraft crashed during testing, one at the 1963 Paris Air Show.

“Improvements to future development aircraft, such as swept wings and more powerful Pegasus engines, led to the development of the Kestrel. The Kestrel was evaluated by the Tri-partite Evaluation Squadron, made up of military pilots from the United Kingdom, the United States, and West Germany. Later flights were conducted by the U.S. military and NASA.

“Related work on a supersonic aircraft, the Hawker Siddeley P.1154, was cancelled in 1965. As a result, the P.1127 (RAF), a variant more closely based on the Kestrel, was ordered into production that year, and named Harrier – the name originally intended for the P.1154 – in 1967. The Harrier served with the UK and several nations, often as a carrier-based aircraft.”]

June 26, 2022

QotD: Breaking the trench stalemate with strategic air power

The first efforts at strategic bombing were made in WWI, though once again the technology wasn’t ready. The range for fixed-wing aircraft was still very limited; the aforementioned Farman F.50 had a range of only 420km, nowhere near enough to really bring entire countries under the threat of bombing. Dirigibles – zeppelins – could manage much longer ranges and the Germans did attempt to bomb British cities with them starting in 1915. The problem was that once aircraft powerful enough to climb to the zeppelin’s altitude were developed, the slow and fragile zeppelins were sitting ducks: lighter than air airships could hardly be armored, after all. Moreover, the bomb loads of zeppelins had always been far too low to make effective strategic bombing possible beyond the initial shock of it.

What no one could have known in WWI was not merely that the technology for effective conventional strategic bombing wasn’t ready, but that it would probably never be ready. Interwar air-power theorists, seeing the potential of strategic airpower to bypass the trench stalemate by flying over it began to try to work out how this would be done. Giulio Douhet (1869-1930) argued that future wars would be fought and won in the air, with fleets of bombers using high explosives and chemical weapons to massacre enemy civilian centers, until civilians forced their governments to surrender. Douhet was not alone; his vision of airpower as shared, for instance, by the “father of the RAF”, Hugh Trenchard (1873-1956).

This concept, “morale bombing” as it is sometimes called, probably deserves its own post discussing its failures. But in brief, the concept was tested, with far larger amounts of bombs than Douhet or any other interwar theorist could have ever dreamed of, during WWII. The argument by air theorists that high altitude bombers could not be stopped was proved false when the British did exactly this, stopping German bombers over Britain in 1940. Moreover, terror bombing against civilian targets in Britain didn’t lead to surrender, but hardened resolve. Likewise, “morale” bombing against German targets by the allies didn’t lead to surrender, but hardened resolve. Later efforts to demoralize the North Vietnamese through a American bombing campaign in the Vietnam War didn’t lead to surrender, but hardened resolve. More recent efforts to demoralize or destroy terrorists and the Taliban through the use of airpower hasn’t lead to surrender, but rather hardened resolve. Likewise, efforts by the Syrian regime to defeat various opposition groups in Syria through the use of chemical weapon-based terror bombing didn’t lead to surrender (siege-and-starve tactics did), but hardened resolve.

It turns out the fundamental premise of the entire idea of morale bombing – that being bombed will make people want to stop fighting – was flawed. Morale bombing has been, depending on how hard you squint at the US air campaign over Japan in WWII (including the use of nuclear weapons) successful either once (out of many attempts) or never. In most cases, the sustained bombing of civilian centers has been shown to increase a population’s willingness to resist, making the strategy worse than useless.

The case for strategic bombing against industrial targets is marginally better, but only marginally. While airpower advocates, particularly in the United States promised throughout WWII that bombing campaigns against German industry could lead to the collapse of the German war machine, in the end many historians posit that the real achievement of the campaign was to lure the Luftwaffe into the air where it could be destroyed, thus denying the German army of air cover and close air support, particularly on the Eastern Front. Some dimunition of German industrial capabilities was accomplished (though it is not clear that this ever approached the vast resources poured into producing the large numbers of extremely expensive bombers used to do it, though the allies had such an industrial advantage over Germany, forcing the Germans to fight in expensive ways in the sky was a winning trade anyway), but the collapse of German industry never happened. As Richard Overy notes, German industrial output continued to rise during strategic bombing and only began to fall as a result of the loss of territory on the ground. Needless to say, “strategic bombing can sucker the enemy into wasting their close air support” was not the result that airpower advocates had promised, nor could it have broken the stalemate.

I don’t want to oversimplify the continued debate over the efficacy of strategic airpower here too much so let’s just say that the jury is still very much out as to if strategic airpower works even with modern technology; it certainly wouldn’t have worked with WWI era technology.

Bret Devereaux, “Collections: No Man’s Land, Part II: Breaking the Stalemate”, A Collection of Unmitigated Pedantry, 2021-09-24.

June 23, 2022

The government believes that anyone opposed to Bill C-11 is “spreading misinformation”

Filed under: Cancon, Government, Liberty, Media, Politics, Technology — Tags: , , , , — Nicholas @ 03:00

Happily for the Canadian government (if not for Canadian internet users), if Bill C-11 gets passed, they can sic the CRTC on those critics … isn’t that convenient?

Last week, shortly after midnight in Ottawa, the House of Commons Heritage Committee concluded its deliberations on the Online Streaming Act, which will grant a federal regulator authority over the global Internet.

You may think putting the Canadian Radio-television and Telecommunications Commission (CRTC) and its nine government-appointed commissioners in charge of the entire online world is a good thing. Or you may think it’s a bad thing. But I’m guessing we can all agree that Bill C-11, the world’s most extensive internet regulation legislation so far, is a Thing.

And you’d think a thing that big would be deserving of respectful, honest debate and thoughtful review. If there’s something in the legislation that is bad in a way that isn’t intended, you’d want it caught and fixed, right? We are, after all, about to grant authority over 21st-century communications to people in charge of something called The Broadcasting Act. An act that was passed in 1993 to make sure nothing terrible — like people preferring NFL over CFL football or the Oscars over the Genies — results from watching too much American TV. Given that thousands of successful Canadian free enterprise Tik-Tokers and YouTubers fear new rules will disadvantage them in favour of the CRTC’s certified cultural broccoli, you’d think that’d be worth a think.

But you’d be wrong.

[…]

But then Liberal MP Tim Louis of Kitchener took this government’s truth-torquing communications strategy to a breathtaking level of self-righteous fantasy — one that dripped with contempt for all but he and his clan.

He calmly rose in the House of Commons and quietly accused C-11’s critics of deliberately spreading “misinformation” — a chilling threat given the government’s plans to deal with he same in “Online Harms” legislation later this year.

Louis did not even try to say, as did Mendicino’s deputy minister, that there was a misunderstanding of some kind. He did not attempt to make it clear that there are people who — as reasonable people often will — disagree. He did not dismiss the bill’s critics as being overwrought, incorrect and yet honourable. He stood up in the House of Commons and, barefaced, declared that views, lived experiences and legal analyses — including the testimony of CRTC Chair Ian Scott — are “simply untrue”. In other words, it’s all #fakenews.

And we are all liars.

June 20, 2022

Claude Chappe and the Napoleon Telegraph

Filed under: France, History, Technology — Tags: , , — Nicholas @ 02:00

The History Guy: History Deserves to Be Remembered
Published 2 Mar 2022

The development of technology for speedy long-distance communication dates back to antiquity, and reached its pre-electronic peak in the telegraph before Samuel Morse’s telegraph. Before wires crossed the world, Napoleonic France could send a message from Paris to Lille, a distance of some 250 kilometers, in ten minutes.

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This is original content based on research by The History Guy. Images in the Public Domain are carefully selected and provide illustration. As very few images of the actual event are available in the Public Domain, images of similar objects and events are used for illustration.

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June 18, 2022

“Fusion is 30 years away and always will be” … how much progress have we made toward practical fusion energy?

Filed under: Books, History, Science, Technology, USA — Tags: , , , — Nicholas @ 05:00

One of the readers of Scott Alexander’s Astral Codex Ten has contributed a review of The Future of Fusion Energy by Jason Parisi and Justin Ball. This is one of perhaps a dozen or so anonymous reviews that Scott publishes every year with the readers voting for the best review and the names of the contributors withheld until after the voting is finished:

Fusion is the power which lights the stars. It is the source of all elements heavier than hydrogen in the universe. Wouldn’t it be great if we could use and control this power here on Earth?

I predict that we will get fusion before 2035 (80%) or 2040 (90%). I am a professional plasma physicist, a fusioneer if you will, so I probably know more about this subject than you, but am likely to overemphasize its importance.

The Future of Fusion Energy is the best introduction to fusion that I know. I can confirm that the information it contains is common knowledge among plasma physicists. My parents, who are not physicists, can confirm that it is accessible and interesting to read.

Things are changing fast in fusion right now, and The Future of Fusion Energy is already out of date in some important ways. I will summarize our quest for fusion as it is portrayed in the book, describe what has happened in the field since 2018, and make some predictions about where we go from here. The predictions are my own and do not reflect the opinions of Parisi or Ball.

 
 

Why Don’t We Have Fusion Already?

There is an old joke:

    Fusion is 30 years away and always will be.

What happened? Why has fusion failed to deliver on its promise in the past?

By the 1970s, it was apparent that making fusion power work is possible, but very hard. Fusion would require Big Science with Significant Support. The total cost would be less than the Apollo Program, similar to the International Space Station, and more than the Large Hadron Collider at CERN. The Department of Energy put together a request for funding. They proposed several different plans. Depending on how much funding was available, we could get fusion in 15-30 years.

How did that work out?

Along with the plans for fusion in 15-30 years, there was also a reference: “fusion never”. This plan would maintain America’s plasma physics facilities, but not try to build anything new.

Actual funding for fusion in the US has been less than the “fusion never” plan.

The reason we don’t have fusion already is because we, as a civilization, never decided that it was a priority. Fusion funding is literally peanuts: In 2016, the US spent twice as much on peanut subsidies as on fusion research.

June 17, 2022

The dark side of Tim Berners-Lee’s statement “When something is such a creative medium as the web, the limits to it are our imagination”

Filed under: Health, Media, Technology — Tags: , , , , — Nicholas @ 03:00

In The Critic, Tom Farr wonders about the wider meaning of the Eugenia Cooney story:

Eugenia Cooney in 2016.
Photo by Lilg54g – CC-BY-SA 4.0 via Wikimedia Commons.

Journalist and author Mandy Stadtmiller shared a new article last week on her excellent Substack series Rabbitholed entitled: “Why is Jeff Bezos Allowing Millions of Teenage Girls to Watch the Severely Anorexic Influencer Eugenia Cooney Slowly Kill Herself On Stream?”

The article itself received widespread attention for its harrowing coverage of the story of Eugenia Cooney, a 20-something Twitch streamer and YouTuber, who has built a global fanbase off vlogs featuring her cosplaying, and giving makeup and beauty tips amongst other things, as well as her distinctive early 2000s emo aesthetic.

Cooney is also severely anorexic. As Stadtmiller’s article succinctly explains:

    Cooney’s horrific skeletal appearance is documented lavishly by her sick and enabling mother, Debra Cooney, who is seemingly keeping her daughter trapped and isolated at home with almost no contact with the outside world outside of the online predatory men who pay her daughter tips to spin around, crawl around on the floor, act like a cat and show how weak she is when trying to lift things.

Whilst Cooney’s story warrants attention, that isn’t the purpose of this article. In order to understand fully the social apparatus that allows and encourages Cooney’s mother to disturbingly parade her young daughter around for tens of thousands of digital voyeurs, no better explanation can be found than the one that actually answers Stadtmiller’s original question: Just why is Jeff Bezos allowing millions of teenage girls to watch Eugenia Cooney slowly kill herself on stream?

Whilst Jeff Bezos could and should be skewered for his role in amassing grotesque, Scrooge McDuck levels of wealth at the expense of anyone with the temerity to want to use the toilet during their working hours, in this instance he is merely a symptom of a deeper rot that has taken hold of our society, aided in part by the explosion of the internet in the late 90s.

Sir Tim Berners-Lee, the founder of the World Wide Web, once said: “When something is such a creative medium as the web, the limits to it are our imagination.” Berners-Lee was not wrong, but it would be unfair to stick him with the responsibility for what the depraved depths of some individuals’ “imagination” have conjured up in the subsequent decades since the web’s mass adoption.

Those of us who grew up in the 90s and early 2000s — ostensibly the first generation to be exposed from an early age to the internet in its more rudimentary form – will surely remember the sporadic emergence of individual “shock videos”: from the fairly benign (“Meatspin”, anyone?) to videos of murder (“Three Guys One Hammer”), the internet was a developing digital territory that its early adopters were still testing the limits of. These videos were occasionally linked to entire websites that would host videos depicting varying degrees of degeneracy, but they operated mainly in the darker corners of the web, reliant on people sending links to each other on MSN with a description that would lull the recipient into a false sense of security in order to get them to click on it.

Such content ran, if not explicitly then certainly conceptually, parallel to another early-2000s meme: Rule 34. In short, Rule 34 stated: “Rule #34 There is porn of it. No exceptions.” It doesn’t really require Einstein’s intellect to parse what was meant by this aphorism: as the porn industry was finding its footing in the new digital age, the type of pornographic content that was readily available was also breaking new ground. Initially, those shock videos existed in a slightly separate orbit to that of more mainstream pornography, but their intersection was by no means a rarity, even in those early days. This somewhat grimly operates as the perfect example of Berners-Lee’s observation that the creativity fostered by the internet is only constrained by our collective imaginations.

QotD: The work of the blacksmith

Filed under: History, Quotations, Technology, Tools — Tags: , , — Nicholas @ 01:00

There are a few basic behaviors of iron that fundamentally control what blacksmiths are going to do with it in this stage. To begin with, we need to introduce some terminology to avoid this coming confusing: a given piece of metal can be hard (resistant to deformation) or soft; it can also be ductile (able to deform significantly before breaking) or brittle (likely to break without deformation). This is easiest to understand at the extremes: a soft, brittle material (like a thin wooden dowel) takes very little energy and breaks immediately without bending, while a hard, ductile material (the same dowel, made of spring-steel) bends more easily under stress but resists breaking. But it is also possible to have hard brittle materials (pottery being a classic example) which fiercely resist deforming but break catastrophically the moment they exceed their tolerances or a soft, ductile material (think wet-noodle) which bends very easily.

(I should note that all of these factors are, in fact, very complex – far more complex than we are going to discuss. In particular, as I understand it, some of what I am using “hardness” to describe also falls under the related category of yield strength. Hopefully you will all pardon the necessary simplification; if it makes you feel any better, ancient blacksmiths didn’t understand how any of this worked either, only that it worked.)

Of course these are not binaries but a spectrum. Materials have a degree of hardness or ductility; as we’ll see, these are not quite opposed, but changing one does change the other – increasing hardness often reduces ductility.

The sort of things that pre-modern people are going to want to be made in iron are going to have fairly tight tolerances for these sorts of things. Objects that had wide tolerances (that is, things which could be weak or a little bendy or didn’t have to take much force) got made out of other cheaper, easier materials like ceramics, stone or wood; metals were really only used for things that had to be both strong and relatively light for precisely the reasons we’ve seen: they were too expensive for anything else. That means that a blacksmith doesn’t merely need to bring the metal to the right shape but also to the right characteristics. Some tools would need to finish up being quite hard (like the tip of a pick, or the edge of a blade), while others needed to be able to bend to absorb strain (like the core of a blade or the back of a saw).

Bret Devereaux, “Collections: Iron, How Did They Make It, Part III: Hammer-time”, A Collection of Unmitigated Pedantry, 2020-10-02.

June 11, 2022

The steam engine — one of the keys to the industrial revolution — was actually pretty late to be invented

Filed under: Europe, History, Science, Technology — Tags: , , — Nicholas @ 05:00

In the latest Age of Invention newsletter, Anton Howes gives the first part of what promises to be a fascinating deep dive into steam engine development pre-dating the commonly accepted chronology of its invention:

What did I discover that so shocked me? When researching my last post on the inventors surrounding Prince Henry in the 1610s, and because I’ve been looking into the history of energy at the urging of Apoorv Sinha and others at Carbon Upcycling, I had a read through the published work of one of the inventors, Salomon de Caus.

De Caus often features in histories of the steam engine, as someone who in 1615 wrote about and depicted the expansive force of steam — heat up water in a copper vessel with a narrow tube coming out the top, and see how water or steam can be made to rise! He was even briefly known as the “true”, French inventor of the steam engine, because of a nineteenth-century hoax.

To historians of science and technology today, however, de Caus’s illustration is pretty unremarkable. He usually just gets a brief name-check, more or less copy-pasted from older histories. This is because the expansive force of steam would turn out not to be all that important in the development of the steam engine, as we’ll see, and because it was ancient.

3D animation of an aeolipile or Hero’s engine.
Animation by Michael Frey via Wikimedia Commons.

Hero of Alexandria, writing sometime in the first century, had already exploited the fact that when you boil the water in a metal vessel with a long, narrowing spout, the steam will come out with quite some force. This aeolipile, as it was sometimes called, was known and used throughout the middle ages and well into the seventeenth century. Sometimes it was shaped a bit like an alchemist’s retort, and known as the “philosophical bellows”. Other times, it was shaped as a human face, the steam issuing from its mouth — like the Greek god Aeolus, blowing the wind.

This was no mere toy, but found plenty of practical use. The spout of the philosophical bellows was often directed at a lamp’s flame, to have a sort of blow-torch effect. It was used, for example, to do finer tasks like bending glass pipes, or in fine metalwork — there are loads of accounts of this throughout the fifteenth, sixteenth, and seventeenth centuries, with some authors even talking about its merits relative to other instruments, suggesting real-life use. Its heat could, apparently, also be used to get fires going in wet weather, or from damp wood (provided you had some dry wood on hand to get the aeolipile itself going).

It could also be put to more sophisticated uses. Hero explained how the principle of thermal expansion — of either water or air — could be exploited to spout steam or even wine onto an altar’s fire to make it flare, to make water issue from a fountain, to make miniature dancers rotate and jump up and down, and to push air through bird-shaped automata to make them sing. A 1630s English version claimed to make the figure of a dragon hiss.

It could even be used to do some light mechanical work. Hero described a version that might make a hollow ball spin, by having the steam issue from bent nozzles. He even described a version where water could be forced by steam from one container into another, which would pull on a weight to open some doors. Taking his idea and running with it, engineers from at least the fifteenth century onwards wrote about directing the aeolipile’s narrow spout at miniature turbines to turn a roasting spits above a fire — suggested in Italy in Leonardo da Vinci’s notebooks, and in a 1551 Ottoman manuscript by Taqi ad-Din — or to do light industrial work like stamping ores and minerals into powders.

The principle of using heat to expand air or steam was even tried for much heavier-duty tasks. In 1605, the French inventor Marin Bourgeois developed an air-powered gun — known as the “wind-gun” — which used air that was pumped and compressed into the barrel. Within just a couple of years, having heard of the demonstration before the French court, and after paying a visit to Bourgeois, the mathematician David Rivault began experimenting on how the same effect might be achieved by heating water in a cannon. In the same decade, the Spanish military engineer Jerónimo de Ayanz y Beaumont also tried to use the expansionary force of steam to drive water up and out of mines — essentially, an industrial version of what Hero had done with fountains.

June 8, 2022

The Story Behind the Dambuster Raid – WW2 Special

World War Two
Published 7 Jun 2022

The thousand-bomber offensive was about to begin as Air-Marshall Harris was assembling his forces. Yet one man was to challenge his strategy. The aircraft designer Barnes Wallis thought: “What if there was a way to destroy Germany’s industrial might not by simply dropping thousands of bombs over its cities, but by a precision strike against its dams?” For this, a new kind of bouncing bomb was to be delivered.
(more…)

June 1, 2022

How To Kill A U-Boat – WW2 Special

World War Two
Published 31 May 2022

How to kill a U-Boat? The threat of the illusive and nearly undetectable submarines had been on the mind of every Allied naval planner since the Great War. As the Kriegsmarine once more unleashed its wolfpacks to the high seas, it became a race against time to find a way to stop the deadly stalkers from beneath the surface.
(more…)

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