Transportation Hacks

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There’s More In A Cardboard Box Than What Goes In The Cardboard Box

March 8, 2022 by 14 Comments

The cardboard box is ubiquitous in our society. We all know what makes up a cardboard box: corrugated paper products, glue, and some work. Of course cardboard boxes didn’t just show up one day, delivered out of nowhere by an overworked and underpaid driver. In the video below the break, [New Mind] does a deep dive into the history of the cardboard box and much more.

Starting back in the 19th century, advancements in the bulk processing of wood into pulp made paper inexpensive. From there, cardboard started to take its corrugated shape. Numerous advancements around Europe and the US happened somewhat independently of each other, and by 1906 a conglomerate was formed to get the railroads to approve cardboard for use on cargo trains.

By then though, cardboard was still in its infancy. Further advancements in design, manufacturing, and efficiency have turned the seemingly low tech cardboard box into a high tech industry that’s heavy on automation and quality control. It’ll certainly be difficult to think of cardboard boxes the same.

There also numerous ways for a hacker to re-use cardboard, be it in template making, prototyping, model making, and more. Of course, corrugation isn’t just for paper. If corrugated plastic floats your boat, you might be interested in this boat that floats due to corrugated plastic.

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the active foil flying across the water

Hydrofoils Love This One Simple Trick

March 4, 2022 by 8 Comments

Earlier in the year, [rctestflight] created an active hydrofoil RC craft but found the actual performance very lacking. Luckily for him and for us, he continued to tweak it and one tweak suddenly turned it from a nightmare to a dream.

That tweak was adding ArduPilot’s airplane model. The design had three servos, which each actuated the angle of a foil underneath one of the three pontoons. The ship propelled itself via some propellers mounted near the top. If you know much about ArduPilot, you notice that active hydrofoil boat doesn’t show up on the list of supported platforms, and you’re right. [rctestflight] points out that the three servos actually function as a plane underwater. The front two are ailerons and the back one is an elevator, all things that ArduPilot knows how to handle with a tightly controlled loop except for one thing; there’s no altitude data.

So he stole a trick he developed earlier for his ground effect plane and used a distance sensor to let ArduPilot know how to adjust things. He used a sonar sensor instead of lidar as it works better with water and he was pleasantly surprised when he took it out on the lake and it just worked wonderfully. The original goal with the active stabilization was to have the efoil immune to choppy waters, and we’re sad to say that it didn’t quite reach that lofty target. The single sonar sensor follows the wave in front of it beautifully but can’t handle the complex waves being thrown at it. Perhaps some sort of sensor fusion algorithm could provide the necessary data to be truly resilient. But we love watching the foil glide across the water and it is hard to remember that it’s actively flying rather than just floating that way.

Others have tried and failed to 3D print a hydrofoil while others have succeeded. We love that [rctestflight] came back to finish the fight and came away a champion. Video after the break.

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The Antonov An-225 Seems To Have Been Destroyed After All

March 3, 2022 by 49 Comments

Something that probably unites most Hackaday readers is a love of machines, particularly unique or interesting ones. In the world of aircraft for example, we’ve run several stories about those which push the edges of the size envelope, be they the Hughes Hercules troop carrier, the Scaled Composites Stratolifter space launcher, or the Antonov An-225 Mriya cargo plane. This last machine has been in the news for all the wrong reasons over the last few days, with reports emerging that it may have been destroyed in the fighting around its base at Hostomel near Kyiv. There has been some uncertainty around this news as it has alternately been claimed to have been destroyed or to have miraculously survived, but now a set of photographs have emerged showing what appears to be the An-225 burning in its damaged hangar.

The An-225 is a unique aircraft not only in the sense that there is no other model quite like it, but also because it was manufactured for the special purpose of being the transport carrier of the Soviet Union’s Buran space shuttle, and thus only one airframe was completed. Its characteristic twin tail served to avoid the turbulence that would have resulted from a Buran mounted on top of its enormous fuselage, and the six engine configuration required to move such a behemoth was in part the clue to identifying it in the photograph. Those readers who were lucky enough to see it take off or land in person will attest to its impressive physical presence, while the rest of us remain sad to have missed that chance.

It seems crass to talk about the destruction of an aircraft when compared to the scale of the unfolding tragedy in Ukraine, but we think perhaps our British and French readers who grew up with Concorde in the sky will understand the power of such a machine as a source of pride. We hope that the Antonov company will return to the design of huge cargo aircraft in peacetime, and Ukranians can again have pride in a monster aircraft that the rest of us will drive for miles just to watch taking off or landing.

The issue of which aircraft is the world’s largest can be a complex one, as we’ve explored in the past.

Header image: Vasiliy Koba, CC BY-SA 4.0.

From Hoverboard To Scooter

February 28, 2022 by 4 Comments

I’m sure anyone who had seen Back To The Future was more than a little disappointed when “hoverboards” started appearing on the scene. They didn’t float and they looked fairly ridiculous for anyone over 12. But they have the huge advantage of being cheap and easy to find. [Made By Madman] breaks down a hoverboard for parts to make an incredible custom electric scooter.

The first step after breaking things down for parts was to break the wheel hub motors. He pulled out the axle and started machining a new one using the lathe and a milling machine. A quick temper later, he had a sturdy steel axle. An adapter for a disc brake was milled that could attach to the wheel. The TIG welder came out to weld up a box out of some aluminum to hold the electronics. The wheel had a bracket welded on with a spring shock absorber to help smooth the ride. The fork was machined on the lathe and belt sander, but actual shocks came from an old bicycle. To attach the fork to the frame, [Madman] bends a piece of bar stock into shape; like a madman. The handlebars were taken from the bicycle and the fork was extended up to an adult height.

A quick test ride in the alley showed that the back shock wasn’t strong enough, so he swapped it with a strong one. All the parts got a powder coat. Electronics wise, it has a standard speed controller and a custom battery made from 18650 cells wired up in a 13s6p configuration and bundled together into a package. After a significant amount of wiring, he took it for a test drove and we love seeing him zip around the streets in the snow.

So many parts here are machined to press-fit tolerances and then welded on. The skill, videography, and effort that went into this were just incredible. If you’re feeling inspired and don’t have a lathe on hand, perhaps this 3d printed scooter might be a bit more your speed. Video after the break.

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Drift Trike Puts A New Spin On Things With Ice Wheels

February 25, 2022 by 6 Comments

A drift trike is a small sturdy tricycle with a powered front wheel and rear wheels with low friction so that you can drift. They’re fun but there are tons of them. Nowadays, if you want to make your own drift trike that stands out, you have to put your own spin on it. And in terms of extra spin, what better way to do it,than to use ice for the wheels. [Sam Barker] started by breaking down an old used BMX bike. A front-wheel hub motor wasn’t available so he had to make some modifications to use his rear-wheel one as a front wheel. After tweaking the seat to put more weight on the front wheel for better traction, it was time to get started on wheels.

Rather than using straight ice, he settled on using a composite. Inspired by Pykrete, he swapped the wood pulp for cotton fibers. After weighing out different percentages of fiber to water, he had a half dozen or so different samples to test. What he found was that anything about 2% was quite strong to the point where smacking it with a hammer didn’t do much. Happy with the results, he 3D printed a mold to hold the ice as it hardens. [Sam] pulled it out a little too early only to have the some of the unfrozen middle leak out. He refilled the mold and got a second wheel going. After waiting for it to fully freeze, he had one and a half wheels and it was time to go for a spin. We appreciate the furze-esk music during the drifting as he is a clear inspiration throughout all of this. We love seeing the tire skids on the pavement, knowing they’ll evaporate soon.

It’s telling that wheels lasted longer than the frame. He admits he just got his MIG welder, so perhaps next time with more practice his tacks will be a little stronger. [Sam] has a love for making electronic vehicles as he’s made a monowheel, a bicycle, and now a tricycle. Perhaps some sort of giant four-wheeled inline skate is next? Other drift trikes don’t go the route of reducing friction but instead focus on delivering so much torque to the wheels that they can’t help but slip. Video after the break.

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This Minibike Will Land You In Hot Water

February 13, 2022 by 32 Comments

The minibike is an American phenomenon which fascinates those of us from countries in which such contraptions are illegal on the road; they seem to deliver bucketloads of low-octane fun in which we are unable to participate. [HowToLou] has one, and as it’s something for use in the Great Outdoors it naturally requires some means of fixing a brew. His solution to the need for a mug of boiling water in out-of-the-way places? A gravity-fed heat exchanger for the exhaust pipe, fed from a reservoir made using an upturned bottle.

As can be seen in the video below the break it’s a simple enough piece of work but surprisingly effective. A piece of small-bore copper tube is passed through a cork into the bottle, then wrapped round a piece of pipe which forms an exhaust The resulting heat exchanger is insulated, the engine started, and the cork loosened just enough to cause a bit of water to flow. The result – a good flow of hot water for that morning coffee.

It may not be the most practical of water heaters, but it’s certainly a bit of fun even if it might not work with all the minibikes we’ve covered.

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3-Wheeled Electric Skateboard Does Things Differently

February 9, 2022 by 6 Comments

Typically, electric skateboards drive one or more wheels with brushless motors, while keeping everything mounted on otherwise fairly-standard trucks to maintain maneuverability. However, [swedishFeetballs] decided to go a different route, building a 3-wheeled design using some interesting parts.

The build relies on a large combined hub motor and wheel, similar to those you would find on a hoverboard or some electric scooters; this one is a Xiaomi part sourced from eBay. It’s controlled via an off-the-shelf electric skateboard speed controller that comes complete with its own remote.

The hardware is all bolted up to a custom skateboard deck built from scratch to accept the large single rear wheel. Up front, a regular skateboard truck is used. Batteries are mounted under the deck. Reportedly, the board has a top speed of 15 mph, which unsurprisingly matches that of the Xiaomi M365 the hub motor is sourced from.

It’s a neat way to build an electric skateboard, and to be honest we couldn’t be more curious as to how it rides. Unfortunately, only a few seconds of footage is available, but we’ve embedded it below for your watching pleasure!

Meanwhile, you might also be curious as to the benefits of a half-track skateboard. Video after the break.

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