[Ryan Schenk] had a problem: he built the perfect surfboard. Normally that wouldn’t present a problem, but in this case, it did because [Ryan] had no idea how he carved the gentle curves on the bottom of the board. So he built this homebrew 2D-scanner to make the job of replicating his hand-carved board a bit easier.
Dubbed the Scanbot 69420 – interpretation of the number is left as an exercise for the reader, my dude – the scanner is pretty simple. It’s just an old mouse carrying a digital dial indicator from Harbor Freight. The mouse was gutted, with even the original ball replaced by an RC plane wheel. The optical encoder and buttons were hooked to an Arduino, as was the serial output of the dial indicator. The Arduino consolidates the data from both sensors and sends a stream of X- and Z-axis coordinates up the USB cable as the rig slides across the board on a straightedge. On the PC side, a Node.js program turns the raw data into a vector drawing that represents the profile of the board at that point. Curves are captured at various points along the length of the board, resulting in a series of curves that can be used to replicate the board.
Yes, this could have been done with a straightedge, a ruler, and a pencil and paper – or perhaps with a hacked set of calipers – but that wouldn’t be nearly as much fun. And we can certainly see applications for this far beyond the surfboard shop.
In the world of surfing, the equipment available is as diverse and varied as the enthusiasts themselves. Different boards are optimized for different conditions and styles, and the industry continues to innovate towards ever greater performance. [DARK-labs] aim to bring data analysis into the field to help create boards personalised to the individual.
The goal is to use a sensor network embedded in a surfboard to analyze the style of a particular surfer. This data is then used to identify characteristics such as stance and foot preference, which can then be used to optimize a board design to suit. Once a CAD model is created along these guidelines, it can then be CNC machined and turned into a finished board, ready to hit the waves.
It’s a project that we expect will capture the interest of many a surfer, and we wouldn’t be surprised to see the concept take further strides in coming years. We’ve featured some other board hacks, too – this electric build is particularly compelling.
Paddleboards, which are surfboard-like watercraft designed to by stood upon and paddled around calm waters, are a common sight these days. So imagine the surprise on the faces of beachgoers when what looks like a paddleboard suddenly but silently lurches forward and rises up off the surface, lifting the rider on a flight over the water.
That may or may not be [pacificmeister]’s goal with his DIY 3D-printed electric hydrofoil, but it’s likely the result. Currently at part 12 of his YouTube playlist in which he completes the first successful lift-off, [pacificmeister] has been on this project for quite a while and has a lot of design iterations that are pretty instructive — we especially liked the virtual reality walkthrough of his CAD design and the ability to take sections and manipulate them. All the bits of the propulsion pod are 3D-printed, which came in handy when the first test failed to achieve liftoff. A quick redesign of the prop and duct gave him enough thrust to finally fly.
There are commercially available e-foils with a hefty price tag, of course; the header image shows [pacificmeister] testing one, in fact. But why buy it when you can build it? We’ve seen a few hydrofoil builds before, from electric-powered scale models to bicycle powered full-size craft. [pacificmeister]’s build really rises above, though.
[pacificmeister], if you’re out there, this might be a good entry in the Hackaday Prize Wheels, Wings, and Walkers round. Just sayin’.
Continue reading “Fly Across The Water On A 3D-Printed Electric Hydrofoil”
You whippersnappers these days with your 3D printers! Back in our day, we had to labor over a blank for hours, getting all sweaty and covered in foam dust. And it still wouldn’t come out symmetric. Shaping a surfboard used to be an art, and now you’re just downloading software and slinging STLs.
Joking aside, [Jody] made an incredible surfboard (yes, actual human-sized surfboard) out of just over 1 kilometer of ABS filament, clocking 164 hours of printing time along the way. That’s a serious stress test, and of course, his 3D printer broke down along the way. Then all the segments had to be glued together.
But the printing was the easy part; there’s also fiberglassing and sanding. And even though he made multiple mock-ups, nothing ever goes the same on opening night as it did in the dress rehearsal. But [Jody] persevered and wrote up his trials and tribulations, and you should give it a look if you’re thinking of doing anything large or in combination with fiberglass.
Even the fins are 3D printed and the results look amazing! We can’t wait for the ride report.