Many cities around the world routinely struggle with smog. Apart from being unsightly, heavy air pollution has serious negative health effects, both in the short term and with regards to long-term life expectancy. Over the years, governments have tried to tackle the problem with varied tactics around the world.
When talking about smog, Brussels is not one of the cities that comes first to mind. Regardless, the local government has developed its new climate plan that seeks to abolish fossil fuel vehicles from its streets by 2035. The scheme has a variety of measures that will be staggered over the coming years. It’s part of a broadening trend in transportation, and something we’ll likely see more of around the world in coming years.
If you’ve spent any time at one of the larger European hacker camps over the last few years you’ll have seen the invasion of little electric vehicles sporting hoverboard motors as an all-in-one propulsion system. German hackers, in particular, have incorporated them into the iconic Bobby Car children’s toy, and ca be seen whizzing around looking slightly incongruous as adults perched on transport designed for five-year-olds.
[Peter Pötzi] has created just such an electric Bobby Car, and his one is particularly well-executed with a 3D-printed steering column extender and four motors for full 4WD rather than the usual two. A steering wheel-mounted display has a neat enclosure, and is fed SPI from the ESP32 that runs the show via an RJ45 patch cable. Many of these builds use hoverboard motor controllers with hacked firmware, but this one instead takes a set of off-the-shelf VESCs. Control comes via a set of Xbox 360 trigger buttons mounted to the underside of the steering wheel.
The result is typically self-contained as are all the Bobby Car builds, with the added bonus of the extra power of four motors rather than two. We’re not so sure that 4WD gives it off-road capabilities though, but having seen these vehicles perform some nifty maneuvers in the past perhaps it’ll lend extra traction on corners.
With the latest craze of electric vehicles, it might be tempting to take an old project car and convert it from gas to electric. On the surface, it sounds simple, but the reality is there are a number of pitfalls. It would be nice if you could find a drop in engine replacement that was ready to go. According to Swindon Powertrain, you’ll be able to soon.
Based on their existing powertrain that can convert a Mini to EV, the transverse powertrain weighs 70 kg and if it can fit in a Mini, it can probably fit in nearly anything. Specifically, it’s 60 cm wide and 44 cm deep — that means it could fit easily in a roughly two foot box. The height can be as little as 28 cm. The company talks about fitting it on a quad bike or even a loading platform. It can be thought of as sort of an electric “crate engine” — a common term for a ready to install powerplant that, as the name implies, arrives in a crate.
The powertrain with a single-speed transmission, cooling system, and inverter weighs in at 154 pounds and generates up to 110 horsepower. We aren’t sure what the expected battery pack is, but presumably, it will be somewhat flexible.
It’ll be interesting to see how people will integrate these if and when they become available as planned in June of next year. Can you drive a differential? Can you use two or four, each driving a different wheel? Turns out we might just be car designers after all.
If you want to see what they did with a Mini, look at their E Classic which claims an 80 MPH top speed and a range of 125 miles. We’ve looked at conversions before. If a conversion is not your thing, you could try to go Open Source although that project doesn’t seem very active.
With climate protests and airline strikes occurring around the world, there is more awareness than ever before for the necessity of environmental sustainability. More importantly, there is more discussion around the immense carbon footprint left by the airline industry, perhaps one of the largest contributors to climate change worldwide.
The Slovenian-based Pipistrel ALPHA Electro is one of the leading electric planes today, with bragging rights as the world’s first mass-produced electric aircraft. While NASA may have announced their X-57 Maxwell, the plane is still undergoing testing for its first planned flight in 2020. The ALPHA Electro, marketed as a trainer plane for flight students and recreational flyers, features a 34’6″ wingspan and low running costs.
The two-person flyer is equipped with a 60 kW electric motor, with a cruising speed of about 157 km/hr. A 21 kW battery provides the plane with enough energy for a 55 minute flight, with a half hour reserve, and takes about an hour to charge back up. An additional perk of flying an electric plane is the low noise and zero CO2 emissions, which allows the flights to take place near large cities with exhaust and noise emission standards.
With airplanes, a majority of the fuel is used for takeoff and landing, making short haul flights particularly troublesome – compare 107 lbs CO2 flying from New York to Boston versus 62 lbs CO2 driving. While refraining from frequent flights is still the best idea for reducing your carbon footprint, we’re hopefully headed towards more environmentally-friendly options for air travel.
It should probably go without saying that the main reason most people buy an electric vehicle (EV) is because they want to reduce or eliminate their usage of gasoline. Even if you aren’t terribly concerned about your ecological footprint, the fact of the matter is that electricity prices are so low in many places that an electric vehicle is cheaper to operate than one which burns gas at $2.50+ USD a gallon.
Another advantage, at least in theory, is reduced overal maintenance cost. While a modern EV will of course be packed with sensors and complex onboard computer systems, the same could be said for nearly any internal combustion engine (ICE) car that rolled off the lot in the last decade as well. But mechanically, there’s a lot less that can go wrong on an EV. For the owner of an electric car, the days of oil changes, fouled spark plugs, and the looming threat of a blown head gasket are all in the rear-view mirror.
[Mastro Gippo] recently purchased a wall mounted charger for his electric car that looked great and had all the bells and whistles he wanted. There was only one problem: the thing burned up on him. Looking to find out how this seemingly high-end piece of hardware gave up the ghost so easily, he took it apart and tried to figure out where things went wrong. While he’s not looking to sling any mud and actually name the company who produced the charger, he certainly has some choice words for whoever green-lit this particular design.
With the charger open, there’s little doubt that something became very toasty inside. A large swath of the PCB has a black char mark on it, and in some places it looks like the board burned right through. After a close examination, [Mastro] is of the opinion that the board heated up to the point that the solder actually liquified on some connections. This conductive flow then shorted out components below it, and things went from bad to worse.
But where did all the heat come from? [Mastro] was stunned to see that a number of the components inside the charger were only rated for 30 amps, despite the label for the product clearly stating it’s good for up to 32A. With components pushed past their limits, something had to give. He wonders how such a device could have made it through the certification process; an excellent question we’d love to know the answer to.
The worst part is, it looks like the designers might have even known there was an overheating issue. [Mastro] notes that there are heatsinks bolted not to a component as you might assume, but directly to the PCB itself. We’ve seen what happens when designers take a cavalier attitude towards overheating components, and the fact that something like an electric vehicle charger was designed so poorly is quite concerning.
By and large, automakers have spent much of the last century trying to make cars quieter and more comfortable. Noise from vehicles can be disruptive and just generally annoying, so it makes sense to minimise it where possible.
However, the noise from the average motor vehicle can serve a useful purpose. A running engine acts as an auditory warning to those nearby. This is particularly useful to help people avoid walking in front of moving vehicles, and is especially important for the visually impaired.
Electric vehicles, with their near-silent powertrains, have put this in jeopardy. Thus, from July 1st, 2019, the European Union will enforce regulations on the installation of noise-making devices on new electric and hybrid vehicles. They are referred to as the “Acoustic Vehicle Alert System”, and it’s been a hot area of development for some time now. Continue reading “Electric Cars Sound Off, Starting July 1st”→