Transportation Hacks

1528 Articles

3D Printing RC Car Tires To Go Fast

August 30, 2023 by 15 Comments

There’s a bit of a high-speed arms race in the RC world on YouTube these days. [Michael Rectin] is in on the action, and he’s been exploring how to 3D print a decent set of tires to help his RC car reach higher speeds mph.

His first efforts involved experiments with TPU. The tires looked okay, but had very little traction. He later moved on to VarioShore TPU, a filament capable of delivering various properties depending on the printing method. Printing for the softest, and thus grippiest, possible tires, [Michael] whipped up some sporty looking boots for his wheels.

His tires improved over  off-road RC tires in one major way. His design didn’t suffer significant ballooning as the rotational velocity increased. However, the VarioShore material lacked grip compared to off-the-shelf rubber RC tires designed for high-speed use. The commercially-available tires also offered a smoother ride.

[Michael] also demonstrated some neat tricks for high-speed RC driving. He used a modified flight controller to correct the car’s steering in response to perturbations, and put in a scaling method that reduces steering inputs at higher speed. That didn’t entirely stop the carnage though, with some incidents seeing wheels thrown off in big tumbling crashes.

Electric-powered RC cars can go darn quick these days, but you might want to consider jet power if you want to break records. Video after the break.

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Next-Gen Autopilot Puts A Robot At The Controls

August 25, 2023 by 19 Comments

While the concept of automotive “autopilots” are still in their infancy, pretty much any aircraft larger than an ultralight will have some mechanism to at least hold a fixed course and altitude. Typically the autopilot system is built into the airplane’s controls, but this new system replaces the pilot themselves in a manner reminiscent of the movie Airplane.

The robot pilot, known as PIBOT, uses both AI and robotics technology to fly the airplane without altering the aircraft. Unlike a normal autopilot system, this one can be fed the aircraft’s manuals in natural language, understand them, and use that information to fly the airplane. That includes operating any of the aircraft’s cockpit controls, not just the control column and pedal assembly. Supposedly, the autopilot can handle everything from takeoff to landing, and operate capably during heavy turbulence.

The Korea Advanced Institute of Science and Technology (KAIST) research team that built the machine hopes that it will pave the way for more advanced autopilot systems, and although this one has only been tested in simulators so far it shows enormous promise, and even has certain capabilities that go far beyond human pilots’ abilities including the ability to remember a much wider variety of charts. The team also hopes to eventually migrate the technology to the land, especially military vehicles, although we’ve seen how challenging that can be already.

This Car Has Wooden Performance

August 23, 2023 by 40 Comments

If you were to take a look at the car parked closest to where you are sitting, there’s an overwhelming probability that its main structural parts are made of steel. A few might be aluminium and fewer still composite materials, but by and large that’s it for automotive structures. This hasn’t stopped the inventive Russians at [Garage 54] from experimenting though, and in their latest they’ve made a car with a chassis made of wood. Not carefully sawn and assembled wooden structural components, oh no. These are wooden tree trunks and branches.

Of course it’s an opportunity for them to run wild on their very successful schtick of the crazy Eastern European YouTuber, but behind that it’s entertaining to watch how they adapt a drive train — taken we’re guessing from the FIAT 124-derived Zhiguli, or Lada as most of us would know it — to such an unconventional chassis. A lot of wire binding is used, and even then the car has a lot of the flexible about it. We’re not so sure about the differential without oil or indeed the front suspension that appears to be developing a lean, but they do manage to take it out of the forest and onto the road.

Are unconventional and definitely-not-road-legal motors your thing? Here’s another, courtesy of some Dutch lads.

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A series of tubes wound up and down as modules in a metal-framed, free-standing wall. The wall is inside a climate-controlled test chamber with a series of differently-colored tubes running behind the free-standing wall.

Cooling Off The Bus Stop

August 18, 2023 by 49 Comments

If you’ve taken the bus in the summer, you know it can get hot while you wait on your ride, even if there is a roof over the stop. Researchers at the University of Seville have devised a way to keep you cooler while you wait.

As temperatures around the world get warmer due to climate change, keeping cool in the summer is increasingly not just a matter of comfort. For the prototype in a climate-controlled chamber, 500L of water were cooled with a chiller and used as a thermal reservoir to reduce temps in the bus stop during the day. Pumps circulate the water through panels when a rider approaches the stop, cooling the space by ~8˚C (~14˚F) over a 20 minute period. Pumps for the system and lighting for the stop will be powered via solar panels and keep the system self-contained.

The amount of cooling offered by the system can be controlled by the flow rate of the water. The researchers plan to use Falling-Film radiant cooling in the outdoor version to replace the chiller to cool the water at night. They also say the system can be used for radiant heating in the winter, so it isn’t just for hot climates.

If you want to know how to survive a wet bulb event or want a better way to determine your bus route, we’ve got you covered there too.

[via Electrek]

A DeLorean sitting on patchy snow next to a driveway. It's angled away from the viewer to the left showing off the open engine compartment with bright orange high voltage lines coming out of a square metallic charger box.

A DeLorean With An Electrifying Secret

August 16, 2023 by 47 Comments

There are few production cars with as much geek cred as the DMC DeLorean. If you want to kick the nerdiness up a notch without doing a full Back to the Future prop-mod, then the next best thing is to make it an EV.

[Bill Carlson] took a 1981 DeLorean and transplanted the drivetrain from a Chevy Bolt to electrify this ride. With the DeLorean being a rear wheel drive vehicle and the Bolt front wheel, there was some amount of component reshuffling to do. The motor is now in the rear of the car along with the main contactor, charger, and motor controller while the batteries are split between a pack in the original engine compartment and another up front under the hood.

The electric power steering and brake booster from the Bolt now also live under the hood, and the accelerator and steering column from the EV were transplanted into the cockpit. [Carlson] still needs to tidy up the interior of the car which is currently a nest of low voltage cables as well as add the cooling system which will bring this stainless monster up to a hefty 3200 lbs (~1450 kg) versus the original 2850 lbs (~1300 kg). We suspect the total bill came in a bit lower than getting an electric DeLorean Alpha5.

This isn’t the first electric DeLorean we’ve covered here, and if that isn’t cool enough, how about this DeLorean-inspired hovercraft?

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Solar Boat Makes Waves

August 11, 2023 by 11 Comments

The two best days in a boat owner’s life are the day they buy it, and the day they sell it. At least, that’s the common saying among people who actually spend money to buy a boat. [saveitforparts], on the other hand, looks like he’s going to have many more great days on this boat than that since he cobbled it together nearly for free, and he won’t even need to purchase any fuel for it since it runs on solar power.

The build starts with [saveitforparts] heading out to a literal pile of boats in his yard, unearthing an old single-person sailboat, and then fixing the major problems with its hull. With a new coat of red paint, the focus turns to the drivetrain. Propulsion is handled by an electric trolling motor found at an auction for $8 and is powered by an off-the-shelf battery bank provided by a sponsor of his channel. A pair of solar panels (which were traded for) fitted to outriggers keep the battery bank topped off, and there’s plenty of energy left over with this setup to charge drone batteries and other electronics while out on the lake.

[saveitforparts] reports that the single-passenger solar boat is remarkably stable on the water and fairly quick at full speed thanks to its light weight. He even hypothesizes that it could be fished from. The only thing not particularly stable was towing it to the lake, as the rough roads and permanently-attached solar panel outriggers weren’t particularly congruent with each other. If you’re looking for something similar to carry a few passengers, though, have a look at this much larger version.

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Pedal Car Vs Ministry Of Transport

August 9, 2023 by 48 Comments

[Tim] from the “Way Out West” Youtube channels has started a fun project — building a wooden pedal-car heavily inspired by “Bugsy Malone”. The kids-sized gangsters in that movie got around in kid-sized pedal cars. Apparently kid-sized [Tim] just loved the idea, but just didn’t have the skills or tools to try to build one. But the time has come, and he has spent years putting together a workshop, tools, and skills.

The goal is a 4-wheeled vehicle that can actually be enclosed, to keep the driver out of the rain. It would be petal powered, with an optional electric assist. It should be made of simple materials, like plywood and epoxy. The design would be freely shared, and the overall cost hopefully kept low. Come back after the link to find the rest of the story, including the monkey wrench thrown into the works.
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