The smile on this man’s face while riding in a mini boat powered by 2 insane electric prop motors is everything I needed to see

Tough break. Interesting forces at play that aren't obvious until something breaks in half!

If you are ever up late at night thinking... 'Why am I doing this?' Keep going because what you're doing is bloody brilliant!

Leave the two vertical fins - they look cool - 50's styling :) You could use the space where the motors were to put some running lights.

Ask the hang glider pilots at Crestline soaring for " broken aero down tubes". These will be 2-4 foot long sections of thin wall, aluminum aerofoil tubing. Use this material to make strong and light vertical sections for your hydrofoil and rudder assemblies. Use another section for the horizontal wing section and add a thin and narrow aluminum bar section to the trailing edge of the hydrofoil and the rudder sections across the entire span to increase the cord. You might also consider a mechanism the allows the hydrofoil to lay close to the underside of the hull in the retracted position; with the vertical supports passing through collars that are a fixed to the either side of the boat. For foil operation; push the vertical supports down through the collars to extend the foil assembly and secure the upper ends with a push pin. If you wanted to "get fancy" you could add a pair of synchronized electric lead screws to the vertical supports to lower or raise the foil assembly "on the fly" Good luck

Perhaps shorten the foils and cant the wings out left and right so you have a V to ride on like a dihedral? Perhaps that would give you a little more stability?

@timtravelnomad

6 ай бұрын

My understanding is V foils are much less efficient than T foils..

@steveobhave

6 ай бұрын

@@timtravelnomad they are but you're working with rotational moments that get worse and worse the higher out of the water you get. Think of it like a wing in the air. You want an ultra stable plane you introduce dihedral, and in extremes polyhedral. Whilst you do get more spanwise flow on the foil with dihedral, you also get improved roll stability. You'll see an awful lot of older and more modern foiling boat designs riffing on the dihedral foil design (more like a big W than a V but the effective forces for lift and stability are the same). I mean you can try to copy the America's Cup AC75 technology but then they have millions behind them and massive fluid dynamics simulation capability.

@timtravelnomad

6 ай бұрын

@@steveobhave it seems to me from previous craft made by this team, that they already have foiling stability solved (at least on small craft) using Ardupilot. They demonstrated stable flight with ardupilot controlling actuators on each of a trifoil design.. even with the ability to adjust roll angles from the remote.. all on Tfoils. E.g they could stably fly along with the foil at a constant height, and a constant roll angle (tilt left, tilt right etc)

Criminally underrated channel. A suggestion for the Boat: consider using toroidal propellers to try and reduce vibrations which will wear on your parts quicker.

@slaapkonijn58

7 ай бұрын

You know that toroidal propellers are not a magic bullet right? They can be better in some circumstances but not all. In this case, he needs to make them himself which is is a project on its own. And also this project might not even benefit from them.

Nice video! 3:20 I recommend buying or building a smokestopper that limits current above a chosen Amperage. It has saved many of my Multicopters and Wings.

So. Much. Sanding. I admire your dedication to composite fabrication. I tried to just modify the front bumper of a race car once and swore to never deal with fiberglass again.

Pretty sure you want V shaped foils that loose lift as they exit the water. Look at the foiling sailboats for inspiration.

You have done a great job building this. I can't wait to see move videos with it.

You never give up, that's the process of going forward step by step.

I for one am glad you didn’t get on it with foils bolted on. I enjoy your videos and don’t wanna see another close call like we did with your ground effect vehicle.

Keep up the great work! I love to see all your projects!

I would use 1 layer chop strand, 3 or 4 layers 1708 biaxal cloth, corecell foam core. Cover with Nylon Peel Ply for a smooth finish. Insert g10 in the foam core for mounting or pivot point blocking. Not cheap but it will never buckle. Cool stuff thanks for the video!

Go man go. You found meaning and it's spreading knowledge to so many people.

Good luck on the next parts of the project!

Cool boat! 😄 I’m super happy to see progress on this 👍

This was super cool! Can't wait to see your improvements

Very cool video I look forward to seeing your progress!

Awesome video as always. However, to be honest, I'm a bit relieved that it didn't work right away. We've been building manned electric hydrofoil boats (but solar-powered) at our university for several years now, and in the design process we often decided against the manufacturing methods you used for the first prototype, because of because they are simple but most likely difficult to process reliably for the high demands on maximum load, stiffness, etc.. So for me it's rather good to see that our assessments were apparently correct.

This is AWESOME. Some Hydrofoils are built with near solid alloy blades and wings as the water beats them at the higher speed and introduces very high forces. A one piece V shaped wing for the front will also give it self balancing effect, as one tip leaves the water so does its flying effect and the deeper side then corrects it again. Also the front can be fixed with some fine tuning then set and forget, with the lifting direction control at the rear also connected to a small float type trailing rod from the front to auto level the boat. Looks like you have enough power to make a water jet setup , intake is at the base of the rear fin channeling up to the jet pump then directly out the back this will also look AWESOME when it's flying.

Very much looking forward to the next steps

Looks promising, good luck on the rebuild

All of your machines are so lovely, it’s a real pleasure to see your craftsmanship as well as technical ability. Keep up the good work

@thewayfaringanarchists8157

7 ай бұрын

I made this comment 8 minutes in lol. It still stands, duck tape or not

Please always add a strong metal cage around propellers, even if the propellers are made of plastic or they are under water. Those can definitely take off a finger and can even end your life if you fall backwards or in the water and the propellers hit your face and neck. It isnt difficult to mistakenly fall over or backwards in a small boat. Please stay safe with your builds

Nice project. Can't wait for an update. Looks like you have a right hand yaw. That's probably due to the fact that your motors are spinning the same direction.

Your channel has gotten so good so fast! Can’t wait for you to hit 100k🎉🎉

Love your videos mate, keep it up

Another awesome project. I love watching your KZread channel.

Gotta say i'm glad to see you're willing to use a $0.05 balloon that you mod in seconds rather than spend an hour and all the resources to print something; it's a failing of a lot of crafters these days that wanna to straight to CAD and 3D printing when a balloon will do the job better in every way...

I can't wait to see this go further. my first thought was the thrust line is about a meter above the lifting surface and the drag line, which can only lead to instability. but you are addressing that with the water prop which is also a lot safer.

Hey! You need a seaplane-like hull with step, or maybe just a not so flat floor: now boat generates too much drag and prevents you from getting up from water.

if the body / fuselage gets out of the water it looks majestic and magic , also in the moments when it decelerates and slowly moves into the water again. Great progress and good luck for this adventure and the 100k subscriber milestone not so far away anymore.

Let’s go 100k 🎉 - this channel will keep going no limit❤️

Man! What a cool project!

This a great learning iteration. Much was accomplished. Repositioning the batteries forward, or adding a rock should correct if there is a CoG issue. This much easer to do than moving foil attachment points. I don't thing the CoG was off (much, if at all). The high pivot point for controlling wing foil pitch foils results in a large travel arc. This forward/aft movement of the foil wings cause the foil to not be aligned with CoG, amplifying control effects. The idea of using a larger fix foil with smaller control wings is a good one. Before replacing the air motors with a water motor, it may be worth testing just a redesigned main foil wing. Making fewer major changes will allow you to better see the effects each change contributes. Multiple baby steps, vs. complicated long jumps.

Awesome build, you might find making a magic wand system like we do for foiling sailboats such as the moths

So close! Great work so far!

Like others have said the front foil could be a V shape BUT make it so as the craft lifts the tips of the foil come out of the water , this means that side will gradually lose lift and the other side will self level if it is more immersed , this should keep it ultra stable and as the craft lifts the drag will reduce making it faster and easier to drive forward

This man makes all the cool projects come to life! I aspire to be half as good as you one day 🎉

nice effort, looks like a good starting point

It flew!!! Damn it, it flew. This was like a Wright Broski moment.

great video. just what I wanted to see, an airboat on foils!! I do hope you try to get around the noise issue with lower rpm props and larger motors.

Very good job Man! Congrat's! Brazil - Ceará - Fortaleza.

5:48 put it on a dolly and hook the boat on the back to a scale, so you can see how much thrust it makes. :)

Seems really cool! In its current form with the props on top, could you add wheels to make it amphibious?

You need to add positive V angle (if you look to front projection) to wings like civil aircrafts., so your wingtips has to be upper than root of the wing. Positive V angle make it self leveling

Your foils look to be 3 times longer than optimal, only just clearing the water with the hull may ad the benefit of some sort of ground effect adding to the lift experienced by the boat as a whole.

Amazing!

oh that servo! ive been looking at that one on amazon longingly wanting a project for it.

You need a bit of dihedral on the main foils. It always tilts to one side until th CG gets out of the projected surface.

As i watched i was like "man, these foils are really thin, hopefully they dont brake and they better be full carbon." Turns out my gut feeling was right 😅 i would probably have considered using existing foils from kitesurfing. Also, i get the idea of controlling the front foils, but is it really necessary? I mean the goal here seems to be in control of the height of the boat above the water. But wouldnt it be enough to just have some vertical rudder in the back to have pitch authority? Just like in Planes? Or Kitefoils? (Well they dont have rudders but pitch authority is acquired by pitching the board as a whole). Anyway i love your projects and dedication, even though it might be a little overengineered sometimes, which actually makes it even more interesting 😂 Keep it goin 🤓

Firstly that looks like so much fun and it was so nice to see it rise out of the water. 😀 It would have been interesting to know how far away it was heard, I'm guessing a mile. But now you're going to drive it from a underwater prop is there enough strength in the stern of the boat to hold the torque from the thrust as well as the lift? 🤔 I suppose it's out with the calculator again. 🥴👍

Legit awesome

Just love your videos.

Great vid

It is such an amazing and ambitious project. I wonder if it wouldn't be easier to make a ⅓ scale model first to iron out the kinks before making the full size craft.

Make the motor trimmable and you might be onto it, you also might want to look at a sea-vee hull or even a stepped hull like a sea plane, you need to break the low pressure under the boat to get out of the hole more smoothly.

Are those 80mm drone motors with 28 or inch props? Beastly. Love the sound. Must make a lot of static thrust tho switching to a strut drive will save headaches and be so much safer. Cheers. Nice build :)

your hydrofoils on the left and on the right should be slanted at a 35 degree angle to ensure balance when turning and when the boat is up and foiling aswell as trying to keep a fixed speed while attempting to get it up of the water just a suggestion

Another amazing think flight project! I am looking forward to seeing the improved water propeller version. Incidendally, I have the same (or very similar) EV battery and want to power a chainsaw with it. But I have trouble finding the fitting 300kv motor to get 12000rpm from the 44V pack. Would you mind sharing your components? BMS, ESC and motors? Thanks!

that's gonna be awesome

Check out the foils of the current Americas Cup boats. The pivot into the water rather than rotate. Also, these sail-rockets have only TWO foils down most of the time.

I sure like this build and the materials used. What's the white spackly-shmoo that gets smeared onto the cut edges of the pink XPS?

I'm excited to see what you create! This was a fun video and the video production quality has gone up a bunch. I absolutely loved the shots where you were riding in the vehicle looking like a kid in a candy shop. Grats on the sponsorship that's a big deal!

When do you do the molded foils, would you throw some clips of how you go about that in the video? I've got some foils I want to make, and I'm still trying to decide what the best way to go about doing it is..

I get a little worried when you're putting your hands anywhere near those massive death blades when the battery is still plugged in.

@ToastyMozart

7 ай бұрын

The seating situation too, leaning or getting thrown back by waves would be fatal.

@__estrogen_

7 ай бұрын

@@ToastyMozart especially with the cg that far back

You were in it at good speed for a air prop powered moment.

I think fixing the foil problem is all you should do first. Maybe add some fan shrouds to help you feel safe. Also maybe some big Dayton style fan blades.

I'm going off-topic with this, but whatever happened to the video entitled "Flying Wing with B-2 Bomber Style Controls (Arduplane)", of April 7, 2021. I saw an article online about it, went to the link and found it was taken down. Can you re-post it or detail why it was taken down? I thought the idea of going rudderless with Arduplane was interesting but can't find the video, even on the Wayback machine. Thanks.

Very Nice Wake, Very Laminar.

Where do find the foam board in so cal? Thanks, great video!

Nice job What do you about instead of using a propeller use a jetboat propulsion system ?

The Gyro should be install in the middle of the point of lift (CG) and center of mass (MC).

that is awesome

You could also seal the electronics with Vaseline or marine grease.

as there are many ready to use foils availible ( mostly for wingfoiling ) i wouls suggest to use at least the mast of the commercial ones as they are far more durable (aluminum extrusions)

Fiber epoxy laminate is strong in tension, not so much in compression, I believe. Any chance to make the core of your foil stems out of metal or wood?

I wish you would include a dramatic reveal of the cost of everything you do... it is interesting for some of us.

wtf this channel is getting better and better fast

Why were the vertical pillars so long?

Awesome.

Do you think some dihedral would help keep it upright?

The joy is in the journey 😅

It's cool! What's the cons and pros compared to non hybrids?

have you considered using a fuselage-type design for the intersection between the strut and lifting foils?

@harken9978

7 ай бұрын

perhaps some V might help too

can't help but smile 😄

@GNARGNARHEAD

7 ай бұрын

aww damn

I wonder if using carbon fiber instead of fiberglass for the foils would be just enough to make them strong enough

Aren’t the foils usually arranged in a V to counteract exactly that side-to-side tipping problem, since then the side that sits lower automatically produces more lift (like with a plane‘s wings, just a lot more aggressive).

@Runoratsu

7 ай бұрын

Like this: www.onmanorama.com/content/dam/mm/en/news/kerala/images/2016/Jul/16/hydrofoil-ferry.jpg.image.784.410.jpg

With these two huge choppers at the back, some triangulation (to the front and to the middle left-right) to hold them would have been a good idea.

How do you control fly height?

Fixed foils in a v from each side and it doesn't need any servos to stay level.

"hey Guys and the three ladies who watch this channel" 😂😂 it's the same for mine

17:00 Intentional Michael Scott moment? 😃

Looks safe

Waiting for the hydrofoil mate haha

Is this how you got your current haircut? Long 80s metal mane before, and then you mounted some giant props directly behind you? 😁

perhaps adding dihedral to the foils might address your instability issue.

Bud, cool project. As a word of caution, your props are open. You build a death / limbs amputation machine. Take is from someone who has been seriously injured by open props.