contra-rotating propellers

A Fully Charged episode on Electroflight, an early-stage project to build a fully electric racing plane that can exceed 300 mph. It features two motors driving contra-rotating propellers.

Tom Scott visits a rotating house near San Diego and explains how electricity, gas and water keep working on the rotating part. It includes a 3D render of the utility connection system.

ContraPoints' 35-minute video essay on incels, examining the community, its worldview and how people get radicalized. It is delivered with theatrical style and an empathetic tone.

A roughly 90-minute video essay by ContraPoints on J.K. Rowling and the controversy around her views on gender. It examines why many LGBTQ people and allies soured on her.

ContraPoints' long-form video response to Jordan Peterson, critiquing his ideas including his use of the term postmodern neo-Marxism. It is delivered in her theatrical essay style.

Nathan Kutz presents the spatio-temporal dynamics of rotating detonation rocket engines, including combustion fronts that behave like solitons. He shows a bifurcation analysis of a multiscale model that captures the main features.

Scott Manley explains rotating detonation engines, how they differ from pulsed detonation engines, and why thermodynamics predicts they beat traditional jet and rocket engines.

A short scene from the film Clerks in which two characters debate whether the independent contractors killed on the second Death Star were innocent victims. It is a comedic discussion of moral responsibility.

Mike Hearn's talk at the 2012 London Bitcoin Conference on the future of Bitcoin, new applications and rebuilding the banking system. He covers lesser-known protocol features such as contracts, escrow and scripting.

Mike Monteiro's Creative Mornings talk "Fuck You, Pay Me" with his lawyer Keith Levine, on contracts, scope creep and making sure designers and freelancers get paid. This copy has Portuguese subtitles.

Scott Manley surveys the research on whether people can adapt to rotating artificial gravity, from early Soviet centrifuge tests to modern studies. He concludes it is an engineering problem and discusses Coriolis effects and station radius.

A hobbyist build-and-experiment video on rotating detonation engines (RDEs), where a continuous detonation wave spins around an annular chamber. The creator 3D prints parts and tests a small engine, while being candid about uncertainty over whether a true rotating wave was achieved.

A TEDx talk arguing that battery electric vehicles are not as environmentally friendly as commonly believed and that the rush to adopt them is misguided. TED flagged it as containing claims that lack scientific support.

Jason Calacanis interviews Peter Thiel at LAUNCH Festival 2015 about contrarian thinking, investing, and building companies such as PayPal, Palantir and Facebook.

A long video essay by Natalie Wynn of ContraPoints on cancel culture, drawing on her own experience of being pile-on targeted by other leftists. It is theatrical and discursive, mixing argument with performance.

Mike Monteiro's CreativeMornings talk on getting paid for creative and freelance work, covering contracts, working with lawyers, and refusing to work for free. It is delivered with blunt humor.

J. B. Rainsberger argues that large integrated tests are a scam: they are slow, fail opaquely, and give a false sense of coverage. He advocates focused collaboration and contract tests at boundaries instead.

Mikey Dickerson's keynote at Velocity NY 2014, one year after the healthcare.gov launch failure. He recounts how a small team rescued the site and what the episode showed about government IT contracting.

A Blackadder the Third scene in which Dr Johnson delivers his dictionary, which lacks Blackadder's invented insults such as contrafibularity.

Veritasium explains magnetism as a consequence of special relativity. Length contraction of moving charges makes a current in a wire attract or repel a nearby moving charge.

Oh The Urbanity! questions the framing that urban planning reforms like bike lanes and traffic calming wage war on suburbanites. It argues that suburban and urban residents alike want less traffic on their own streets.

Hillel Wayne's PyCon 2018 talk on testing beyond pytest and mypy. It introduces property-based testing with the Hypothesis library and design-by-contract with dpcontracts, and shows how to combine them with an existing test suite.

Video of the March 2014 Senate Defense Subcommittee hearing on National Security Space Launch programs. Elon Musk of SpaceX testifies alongside ULA's CEO, a GAO official and a policy expert, on launch contracts and Russian engines.

Essential Craftsman announces the start of a spec house build on a scenic lot, kicking off a long series. The channel covers every step of building a house from the viewpoint of a general contractor.

RimWorld creator Tynan Sylvester explains at GDC 2017 how Ludeon framed the game as a story generator rather than a game. He covers the design methods that came out of that frame.

Freeman Dyson's 2005 Boston University talk on heretical views about science and society. He questions prevailing dogmas, including his argument that climate and CO2 are a land management issue.

Veritasium explains the Dzhanibekov effect, also called the tennis racket theorem, where a spinning object flips unexpectedly about its intermediate axis. The video gives an intuitive account of the underlying rotational dynamics, drawing on Terry Tao's explanation and the original papers.

AdoredTV relays leaks and insider accounts of what it is like inside Intel, including staffing changes and morale. It is a commentary video from 2020.

Tom Scott tours the rotating room artificial gravity facility at Brandeis University's Graybiel lab. It shows how humans cope with rotation-based gravity and the odd effects such as Coriolis forces.

Louis Rossmann criticizes Apple's independent repair provider program as a PR move with invasive contract terms. He argues it does little for independent shops or customers.

Veritasium's Derek Muller visits NASA JPL to see the Mars helicopter Ingenuity before it was mounted on the rover. He explains how it can fly in Mars's thin atmosphere with large, fast-spinning contra-rotating rotors and low mass, and covers power and cold.

Jonathan Blow gives a roughly 90-minute talk, followed by Q&A, on how video games could actually improve education, in contrast to what is currently being tried.

A 54-second clip from the film Office Space in which two coworkers talk about what they would do with a million dollars. The answers contrast blue-collar and white-collar attitudes toward work.

Peter Sripol builds and flies an RC aeroplane whose wings are rotating KFC buckets, using the Magnus effect (Flettner rotors) for lift. It is a hobbyist experiment in unconventional aerodynamics.

The classic Monty Python sketch in which a man visits an Argument Clinic to buy an argument. It is a wordplay-heavy bit about contradiction versus real argument.

A short tour of a UK materials recycling facility showing how mixed recyclables are mechanically and optically sorted. Aluminum, ferrous metal, glass, paper, and trash come out as separate streams.

Micro Men is a 2009 BBC comic drama about the early 1980s British home computer boom. It follows the rivalry between Clive Sinclair and Acorn founder Chris Curry over the BBC Micro contract and the ZX Spectrum.

Rich Hickey's JaxConf 2012 keynote examines what values are and why immutable values matter as information systems grow more complex and data gets bigger. It contrasts places with values and builds the case for immutability.

Not Just Bikes introduces the "stroad", a street-road hybrid common in the US and Canada that fails at both jobs. He contrasts it with Dutch design, where each road has a single purpose, and covers cost, danger and ugliness.

Rich Hickey's keynote on software versioning, arguing that breaking changes are the real problem and that libraries should only grow by providing more and requiring less. It critiques semantic versioning and ties into Clojure spec.