The First Afghan Sports Car Has An Engine You Shouldn’t Mock

In the news today, Afghanistan has made its first sports car, and it’s a sleek and low-slung model with a throaty exhaust note that would get a second look on the Autobahn just as much as it does on the streets of Kabul. Making a modern sports car is an impressive achievement no matter where you do it, but it wouldn’t be something we’d share with you were it not for how the story is being reported. The general tone of Western reporting is focused not upon the car itself, but instead poking fun of it for using a Toyota engine also found in a Corolla.

Anyone who grew up during the Cold War will remember the rhetoric of the era with respect to technology. To paraphrase a little, our planes or rockets were based on the finest and latest high technology, we were told, while theirs were held together with string and sealing wax from the 1940s. This neglected the fairly obvious fact that Soviet probes were visiting all the planets, something they must have had some pretty good tech at their disposal to achieve. This was then explained as the product of their having stolen all our super-advanced Western tech, something we now know that our lot weren’t averse to either when the opportunity arose.

It’s this which is brought to mind by the mirth of the Western commentators at the Afghan car’s supposedly humble engine. It doesn’t matter what you think of the Afghan regime (and there’s plenty there to criticize), the car should be assessed on its merits. After all, it’s hardly as though the engine in question didn’t find its way into more than one sports car that Western commentators might find appealing.

Building A Homemade Ambient Pressure Submarine

About two years ago, [Hyperspace Pirate] set to work on building his own two-seater submarine, because who doesn’t want to have a submarine when you have just moved to Florida? In the linked video (also attached below), he describes the reasoning behind the submarine design. Rather than going with a fully sealed submarine with ambient pressure inside and a hull that resists the crushing forces from the water, he opted to go for a semi-wet ambient pressure design.

What this essentially entails is a fancy equivalent of an old-school diving bell: much as the name suggests, these are sealed except for the bottom, which allows for water to enter and thus equalize the pressure. Although this has the distinct disadvantage of being not dry inside (hence the semi-wet), it does mean that going for a dive is as easy as letting the water in via the bottom hole, and to resurface only a small amount of air injected into two ballast tanks and a pump are all that are required.

So far this submarine has survived a few test runs, which uncovered a number of issues, but diving and resurfacing seems to be going pretty smoothly now, which is definitely a massive plus with a submarine.

(Thanks to [Drew] for the tip!)

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TV personality and maker, Adam Savage, sits on a chair attached to a milk crate on wheels. It is situated inside an assortment of steel tubes forming the legs and body of a strandbeest walking machine.

Human-Powered Strandbeest

Once you’ve seen a strandbeest, it’s hard to forget the mesmerizing movement of its mechanical limbs. [Adam Savage] built a pedal-powered strandbeest in (more than) one day in full view of the public at the San Francisco Exploratorium.

One of the biggest challenges with building strandbeests is the sheer number of parts required to build a walking machine. It becomes clear rather quickly how big of an advantage the wheel is for part count on a device. Add in a few seemingly small design errors, and you might not have any forward motion at all.

[Savage]’s build takes us through all the ups and downs of this process, including lots of wrenching, welding, and more sneakers than Squitter the Spider could wear. The final product is unwieldy, impractical, and beautiful. What more could a maker ask for?

If you need more strandbeest goodness, check out this more practical strandbeest bicycle, this strandbeest Venus rover concept, or Jeremy Cook’s talk about designing strandbeest bots.

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A blue Mercedes SLS AMG sports car body with bicycle wheels. The gull wing is open to reveal the spartan interior and the hood is open to reveal an empty engine compartment since this is actually a bike.

SLS AMG Velomobile

Many gearheads dream of owning a supercar, but their exorbitant prices make them unattainable for all but the most affluent. [Andrzej Burek] decided to make his dreams come true by building his own supercar with a human-powered twist. [YouTube]

At first glance, [Burek]’s SLS AMG looks like the real thing. Pop the hood, and you’ll find this “car” is missing it’s V8 which has been replaced by a beefy speaker pumping out engine sounds from any car you choose. Both driver and passenger can provide propulsion for the sociable tandem, and the power is routed through a differential to the rear wheels. [Burek] decided to install the differential to make installing power assist motors simpler in future revisions of this quadracycle.

[Burek] said it’s taken him four years from buying the first component to the bike’s status in the video after the break. Other than the front and rear bumpers, he built the body himself out of fiberglass to learn how to work with the material. He welded the frame himself as well, and, in a testament to good measurements, the two parts fit together when united despite being built in separate locations. You can checkout more pictures on his Instagram.

If you want some more bike hacks, check out this Open Source Bike Computer or this Exercise Bike Game Controller.

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Building A Giant Remote Controlled Model Airbus A380 In A Year

A year ago [Ramy RC] set out on a momentous challenge: to build a 1:21 scale Airbus A380-800 RC model with functional engines, landing gear and all other details. Recently he finished the project and published a video with a summary of the whole build process (also linked below). The full video series can be found on the Ramy RC channel. The final RC airplane came out at a massive wingspan of 3.9 meters (12.7′), a length of 3.6 meters (11.8′) and a weight of 25 kg. This weight is carried by the full landing gear of multiple bogeys that can retract much like on the real airplane.

A range of materials were used for the body, including carbon fiber and wood, with each part carefully modeled with CAD software and 3D-printed or cut on a CNC cutter. Four ducted fans provide the propulsive power that lift this enormous model airplane into the skies, which is the only part where the noise profile doesn’t quite match that of the real A380. Even so, seeing the airplane taxing, taking off and flying through the skies makes you look twice to realize that it is in fact a scale model and not a real Emirates A380-800, also courtesy of the excruciating amount of detail to the model’s final look, down from the logos to the silver-grey lines.

We’re also quite convinced that the maiden flight of such an exquisite model has to be one of the most terrifying experiences imaginable.

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Developing An Open Source Bike Computer

While bicycles appear to have standardized around a relatively common shape and size, parts for these bikes are another story entirely. It seems as though most reputable bike manufacturers are currently racing against each other to see who can include the most planned obsolescence and force their customers to upgrade even when their old bikes might otherwise be perfectly fine. Luckily, the magic of open source components could solve some of this issue, and this open-source bike computer is something you’ll never have to worry about being forced to upgrade.

The build is based around a Raspberry Pi Zero in order to keep it compact, and it uses a small 2.7 inch LCD screen to display some common information about the current bike ride, including location, speed, and power input from the pedals. It also includes some I2C sensors including pressure and temperature as well as an accelerometer. The system can also be configured to display a map of the current ride as well thanks to the GPS equipment housed inside. It keeps a log in a .fit file format as well so that all rides can be archived.

When compared against a commercial offering it seems to hold up pretty well, and we especially like that it’s not behind a walled garden like other products which could, at any point, decide to charge for map upgrades (or not offer them at all). It’s a little more work to set up, of course, but worth it in the end. It might also be a good idea to pair it with other open source bicycle components as well.

Thanks to [Richard] for the tip!

Replace Your Automatic Transmission With A Bunch Of Relays

A “Check Engine” light on your dashboard could mean anything from a loose gas cap to a wallet-destroying repair in the offing. For [Dean Segovis], his CEL was indicating a fairly serious condition: a missing transmission. So naturally, he built this electronic transmission emulator to solve the problem.

Some explanation may be necessary here. [Dean]’s missing transmission was the result of neither theft nor accident. Rather, he replaced the failed automatic transmission on his 2003 Volkswagen EuroVan with a manual transmission. Trouble is, that left the car’s computer convinced that the many solenoids and sensors on the original transmission weren’t working, leaving him with a perfectly serviceable vehicle but an inspection-failing light on the dash.

To convince the transmission control module that a working automatic was still installed and clear the fourteen-odd diagnostic codes, [Dean] put together a block of eight common automotive relays. The relay coils approximate the resistance of the original transmission’s actuators, which convinces the TCU that everything is hunky dory. There were also a couple of speed sensors in the transmission, which he spoofed with some resistors, as well as the multi-function switch, which detects the shift lever position. All told, the emulator convinces the TCU that there’s an automatic transmission installed, which is enough for it to give the all-clear and turn off the Check Engine light on the dash.

We love hacks like this, and hats off to [Dean] for sharing it with the VW community. Apparently the issue with the EuroVan automatic transmissions is common enough that a cottage industry has developed to replace them with manuals. It’s not the only questionable aspect of VW engineering, of course, but this could help quite a few people out of a sticky situation.

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