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  • Kingsbury K-Drive

    The video below of the Human Power Team’s elliptical drive system is the first time I’ve seen a non-circular power system in motion. Functionally identical to the “K-Drive” of the Kingsbury Kingcycle, the mechanism is first described in 1890, so it might be more correct to call it a “Vietor...

  • Making it Better—Open Source CNC

    CNC routers and laser cutters are now common machines. Not ubiquitous, like a hammer, but they are common enough that I can send a pattern for cutting, or visit a lab and operate one myself. However, they still remain expensive, industrial machines. Makerslide took the idea of a standard aluminium...

  • LaTeX-SVG-to-PDF as git submodule

    I’ve mentioned previously that I’ve got a large project in \(\rm\LaTeX\) and while I was using Dropbox as a pseudo revision control and external backup. However, I’ve since been persuaded that a proper revision control system with meaningful commit message is a better way of tracking progress and changes. So...

  • Print your own John Carter

    I’ve been coming across quite a few references to Edgar Rice Burroughs’ book “A Princess of Mars” over the past couple of months, from being the story behind Disney’s upcoming film “John Carter of Mars”, to being a classic science fiction text that has inspired many creators. So when it...

  • Putting Dotfiles in Git

    If you’re a Windows user, then you probably won’t have come across dotfiles before. For Mac (a form of Unix) and Linux users, dotfiles hold certain environmental settings and customisations, so if you work on more than one computer, you might like a way of sharing your preferences between them....

  • On the Creative Process

    An upcoming deadline for my thesis rewrites in April means I’ll be reducing the time I’m putting into blog posts until then. There’ll be less original content, but I should still have something up every week. Before I started working on Atomic Duck I, like many people, didn’t fully appreciate...

  • European Velomobile Tour 2013

    Bigest problem facing the expansion of the velomobile market is obscurity. There are plenty of people who could see the practical advantages of using a velomobile, and would interested in owning one, but for the low number of velomobiles around the world meaning that very few people have ever heard...

  • Steering Assembly

    I went through the steering pulley arrangement in detail last week, and here’s the whole steering assembly: A005_R002 Steering Assembly Steering Pulley Arrangement Top View Pulley Side Layout Wheel-Side Parts Diagram There’s additional support structure around the pulley mount on the dash panel. As it was, the length of the...

  • Solidly Mounted Steering

    well, not solid, it’s no good if you can’t turn the wheel! Before I show the complete steering assembly, I wanted to show the detail of the steering pulley, where the driver’s end of the steering cables connects to the steering wheel and how all the parts clamp up around...

  • Is it a Car or is it a Bike?

    The correct answer is probably: door number three — “neither, it’s a different vehicle that is somewhere between both of them”. I’ve had a re-read recently of Frederik Van De Walle’s Master’s Thesis “The Velomobile as a Vehicle for more Sustainable Transportation” (freely available to download from his site); and...

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