Supersonic Flight May Finally Return To US Skies

July 24, 2025 by Tom Nardi 51 Comments

After World War II, as early supersonic military aircraft were pushing the boundaries of flight, it seemed like a foregone conclusion that commercial aircraft would eventually fly faster than sound as the technology became better understood and more affordable. Indeed, by the 1960s the United States, Britain, France, and the Soviet Union all had plans to develop commercial transport aircraft capable flight beyond Mach 1 in various stages of development.

Yet today, the few examples of supersonic transport (SST) planes that actually ended up being built are in museums, and flight above Mach 1 is essentially the sole domain of the military. There’s an argument to be made that it’s one of the few areas of technological advancement where the state-of-the-art not only stopped moving forward, but actually slid backwards.

But that might finally be changing, at least in the United States. Both NASA and the private sector have been working towards a new generation of supersonic aircraft that address the key issues that plagued their predecessors, and a recent push by the White House aims to undo the regulatory roadblocks that have been on the books for more than fifty years.

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The Death Of Industrial Design And The Era Of Dull Electronics

July 23, 2025 by Maya Posch 191 Comments

It’s often said that what’s inside matters more than one’s looks, but it’s hard to argue that a product’s looks and its physical user experience are what makes it instantly recognizable. When you think of something like a Walkman, an iPod music player, a desktop computer, a car or a TV, the first thing that comes to mind is the way that it looks along with its user interface. This is the domain of industrial design, where circuit boards, mechanisms, displays and buttons are put into a shell that ultimately defines what users see and experience.

Thus industrial design is perhaps the most important aspect of product development as far as the user is concerned, right along with the feature list. It’s also no secret that marketing departments love to lean into the styling and ergonomics of a product. In light of this it is very disconcerting that the past years industrial design for consumer electronics in particular seems to have wilted and is now practically on the verge of death.

Devices like cellphones and TVs are now mostly flat plastic-and-glass rectangles with no distinguishing features. Laptops and PCs are identified either by being flat, small, having RGB lighting, or a combination of these. At the same time buttons and other physical user interface elements are vanishing along with prominent styling, leaving us in a world of basic geometric shapes and flat, evenly colored surfaces. Exactly how did we get to this point, and what does this mean for our own hardware projects?

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The Epochalypse: It’s Y2K, But 38 Years Later

July 22, 2025 by Lewin Day 44 Comments

Picture this: it’s January 19th, 2038, at exactly 03:14:07 UTC. Somewhere in a data center, a Unix system quietly ticks over its internal clock counter one more time. But instead of moving forward to 03:14:08, something strange happens. The system suddenly thinks it’s December 13th, 1901. Chaos ensues.

Welcome to the Year 2038 problem. It goes by a number of other fun names—the Unix Millennium Bug, the Epochalypse, or Y2K38. It’s another example of a fundamental computing limit that requires major human intervention to fix.

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Power Grid Stability: From Generators To Reactive Power

July 22, 2025 by Maya Posch 41 Comments

It hasn’t been that long since humans figured out how to create power grids that integrated multiple generators and consumers. Ever since AC won the battle of the currents, grid operators have had to deal with the issues that come with using AC instead of the far less complex DC. Instead of simply targeting a constant voltage, generators have to synchronize with the frequency of the alternating current as it cycles between positive and negative current many times per second.

Complicating matters further, the transmission lines between generators and consumers, along with any kind of transmission equipment on the lines, add their own inductive, capacitive, and resistive properties to the system before the effects of consumers are even tallied up. The result of this are phase shifts between voltage and current that have to be managed by controlling the reactive power, lest frequency oscillations and voltage swings result in a complete grid blackout.

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Fixing Human Sleep With Air Under Pressure

July 21, 2025 by Lewin Day 69 Comments

By and large, the human body is designed to breathe from birth, and keep breathing continuously until death. Indeed, if breathing stops, lifespan trends relatively rapidly towards zero. There’s a whole chunk of the brain and nervous system dedicated towards ensuring oxygen keeps flowing in and carbon dioxide keeps flowing out.

Unfortunately, the best laid plans of our body often go awry. Obstructive sleep apnea is a condition in which a person’s airways become blocked by the movement of soft tissues in the throat, preventing the individual from breathing. It’s a mechanical problem that also has a mechanical solution—the CPAP machine.

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Why Apple Dumped 2,700 Computers In A Landfill In 1989

July 21, 2025 by Lewin Day 55 Comments

In 1983, the Lisa was supposed to be a barnburner. Apple’s brand-new computer had a cutting edge GUI, a mouse, and power far beyond the 8-bit machines that came before. It looked like nothing else on the market, and had a price tag to match—retailing at $9,995, or the equivalent of over $30,000 today.

It held so much promise. And yet, come 1989, Apple was burying almost 3,000 examples in a landfill. What went wrong?

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A Field Guide To The North American Cold Chain

July 17, 2025 by Dan Maloney 22 Comments

So far in the “Field Guide” series, we’ve mainly looked at critical infrastructure systems that, while often blending into the scenery, are easily observable once you know where to look. From the substations, transmission lines, and local distribution systems that make up the electrical grid to cell towers and even weigh stations, most of what we’ve covered so far are mega-scale engineering projects that are critical to modern life, each of which you can get a good look at while you’re tooling down the road in a car.

This time around, though, we’re going to switch things up a bit and discuss a less-obvious but vitally important infrastructure system: the cold chain. While you might never have heard the term, you’ve certainly seen most of the major components at one time or another, and if you’ve ever enjoyed fresh fruit in the dead of winter or microwaved a frozen burrito for dinner, you’ve taken advantage of a globe-spanning system that makes sure environmentally sensitive products can be safely stored and transported.

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