Can a HYDROFOIL Fly like an Airplane??? 

Came for the engineering, stayed for the one-off music as always!

Can we all take more to appreciate the work this man is doing to entertain and educate us. Thank you very much!

Actually applauded my screen with that first test sail under automated trim control. Just beautiful. Gods I would love to see that system on a full sized sailing dinghy. Keep sail control and tiller in the hands of the skipper and let the system manage attitude/altitude. Thank you for all of your incredibly original work.

The Hydrofoil song is great like the previous tunes you have created and added, thank you. This sets you apart along with your capabilities.

"Sonar is notorious for being noisy" You don't say... lol

Some racing sailboats have something called a kelp cutter - it's a razor that can move up and down a groove on the front edge of the keel to cut any sea-weed. That could be an option for you.

Man, there's some serious research going on here... would love to see this find it's way into something scaled up. All topped of with what is quite possibly the greatest song in RU-vid history.

RU-vid was very quick to recommend this to me 👀

can we give him credit for the song thats cool keep it up and love to see you got it fixed

Man, I love Ardupilot. Such a great and easy-to-use software. Thanks for inspiring me to build my own long-range random RC creations and UAVs.

Came for the amazing build's...stayed for the epic tunes!

When the rig was upended in the water, it looked like it might be signifigantly tail heavy (center of gravity aft of center of lift). Borrowing from aeronautical practice, for a plane to be auto-stable in pitch, the CG needs to be slightly forward of the CL, with the tailplane pushing down to balance the nose weight. Ergo, self-stability in pitch. If the CG is too far aft, the pilot is tasked with horsing the elevator to maintain pitch. No doubt you know all this already, but I just thought it might be worthwhile to experiment with CG location.

Great job Daniel! I always look forward to Colin’s take😎

love seeing the videos man! always great quality! keep up the good work!

The level of ingenuity is amazing. So cool to see the development process. And definitely stayed for the rctestflight bops

I've been a subscriber since 150 subscribers. I'm so happy to see how far you've come man. Keep up the great work!

LMAO, the songs are just getting better and better! Love it! Oh also the aircraft is pretty preeetttyy cool! :D

You could add razor blades to cut sea weeds ! That's will be METAL !!!!!

Man. I love your videos. I always forget about the songs until they show up. I'm gonna put it on my list to buy that record. You guys are great. Thanks for all of this.

Dope Hydrofoil song dude

You stated that the vessel struggled going down-wind - I'd assume that waves pushing from behind would effectively reduce the net velocity vector which would then reduce the lift produced. You'd need excess thrust to account for down-wind effects to stay relatively levelled. You also mentioned that sea-weed would produce drag and choppy waters can be harder to navigate - I think only scale would be able to reduce the impact of these effects. Regardless, great project and ideas, really excited to have seen how an automated hydrofoil vessel navigates this effectively!

It would be cool to build a boat that goes from normal boat to hydrofoil to ground effect plane

@rctestflight the rough water test is pretty impressive. It looks like the foils leave the water in the vally of the wave sometimes causing the nose to drop with no more lift. driving upwind vs downwind changes the frequency of waves passing the vehicle by a lot when the boat travels around wave speed. differences between up- and downwind could be in the reading of the sonar or behavior of the flight controller. LOVE YOUR WORK!

This man doesn’t only make awesome rc vehicles but he has also written an amazing song!

You could try to add water level sensors to the pylons for the wings. That should be way more accurate than the sonar and allow for higher resolution.

This might be difficult to implement but maybe on a larger scale: for clearing seaweed, incorporate rollers on the leading edges of sponsons and wings, and when the motor amperage vs. ground speed skews too high, briefly power all the leading edge rollers to just roll off any weed that has wrapped around.

I think your catchy and creative songs are becoming my favorite part of your videos

You are blessed to have a mate like Colin.

Waiting for the Spotify album to drop ⏰

I love the song

Thank you to rctestflight for posting this video!

absolutely brilliant, your videos make me smile. Keep going with the great work, cheers, Nigel

I'd love to see some efficiency test in hydrofoil mode vs normal floating mode

7:45 I'd guess because, while its airspeed is the same, its water speed is much slower so it can't get the same lift from the same throttle input

Super cool video with surprisingly stable results; great work! Colin also rolls in with another absolute banger as usual.

You make me miss Washington so much, I moved away and its nice getting to see the views of home on top of the hydrofoil

I think that the seaweed could be cleared by having a thin "finger" extending in front of the riser from the hydrofoil that was on a freely rotating bearing, (so that it simply rotates out of the way to release the seaweed behind the foil.) The engineering challenge is keeping the finger in front of the foil, most of the time. (I thought about having three fingers and hope that it would passively settle with two dragging behind to keep the third in front of the foil. Rather than height, you could add a depth sensor to each of the risers, (tube that is open at the bottom that reads pressure - as the vessel sinks the pressure increases - this would isolate measurement from the water surface and also have passive dampening.)

Ngl the song for this one actually slaps. Freaking bop my guy.

I love the brilliant people with the smallest budget. You get the most ingenious creations!

There were some beautiful shots of that beast - and loved that song haha - so glad I found your channel

Now hear me out, I’m not an engineer and my RC experience is limited. BUT adding a function on the ESC with a “self cleaning” system, say like some razor blades on each upright that cycle them selves when the posts get gunked up with seaweed. Razor blade (or whatever it may be) cycles itself down the posts and cuts/pushes the seaweed off. I imagine with there being resistance on the seaweed through the water a blade would cut threw it pretty easy.

The music!!😂 I can’t stop laughing!!

another incredible project and can i just say i REALLY appreciate the music too! bravo!

I lose it every time you just perfectly segway into a musical number related to the video. Top tier content man, keep it up!

Idea: long range hydrofoil mission with automatic seaweed removing capability Maybe something like a wire that normally sits at the front of the legs to catch the weeds and can be moved to discard them

Could you reduce sensor twitchiness by combining sonar through a low pass filter with z axis acceleration double integrated through a high-pass filter?

Your prototype represent the potential to forever change the naval travel experience for everyone! Brilliant

A friend of mine built one of these very similar to yours about 15 years ago, except his had small forward outriggers that stayed in the water and linked mechanically to the front hydrofoils to keep the ride height consistent.

Loved this. I'm thinking if Nicola Tesla had Colin's music to highlight his experiments, the world would be a different place today.

That Bo Burnham Jeffrey Bezos cover slaps.

I remember watching your videos as a kid, and the one I always came back to was the modifications to the Walmart RC car. Good times

Always happy when I see you have uploaded a new video!

Regarding the seaweed problem, attach razors to the leading edges. That should cut through most seaweed, and maybe even fishing line.

Addictive tunes ¯\(◉‿◉)/¯

I remember seeing (and hearing!) the Boeing 929 coming out of Renton, north up the lake. Pretty rad machine!

That. Is amazing. Looks so freaky moving through the water. Cool, man!

Great job. That was some serious science. Millions were spent to cover the same ground.

Wow, fantastic project 👍 Thanks for sharing your experience with all of us 👍😀

I bet by November Daniel will have a super-cavitating self navigating rc sub drone. Seriously, always fantastic engineering.

I was really enjoying the video.. Then the song, and wow, amazing talent! In all seriousness, definitely some of the best RU-vid content.

Came here to say that Colin's music has launched an already amazing channel into pure legend. Hydrofoil BUMPS!!!

At 4:05 when the song starts.... it's just pure gold my dude, great video!!👍👍👍

These songs keep getting better and better!

Your amazing channel is what pushes me through COVID

The independent range sensors are also creating roll oscillation. As one increases height, it dips the opposite side.

By far my favourite YT channel. In addition to finding innovative solutions to real-world challenges it’s also highly amusing with its understated wit and humour … and the genius move to create their own backing music - nice touch !

It's another great video from you ❤️ Thanks for the great videos Regards from Denmark 🇩🇰

This is so cool! And the music is top notch!

Pretty sure this was my first video from you. I was digging the video, then the music started. Honestly, it was amazing and very unexpected.

Please Daniel release the official song on spotify!!! ITS BANGER

Your funky beats are low-key addicting

The song is just so good it's over shadowing your hard work.

I've got a hypothesis why it's harder to go downwind: The top layer of water gets dragged along by the wind a bit, creating a current on the top layer, but only 10 cm deep. This means the (airspeed-->) waterspeed is higher when you descend, meaning more lift. More lift + adjustments by the computer = too much lift

You nailed it! Big time! Congratulations!

Amazing work as always! Very impressive and entertaining results. For your next boat project, you should consider attempting an autonomous sailboat mission. Put that wind to work for you!

That landscape looks gorgeous 👌🏼

That's just plain impressive! Great innovation!

Great idea to show some of the ardupilot "logic"/background !

great music and fantastic work again Daniel.

That song made my day, I loved it, big Flight of the Concords vibes

So cool! You mentioned problems with it going downwind, I think this is because it then "stays in the wave" and sort of surfs down it, rather than going through the waves. I presume when going through the waves, the bumps are not large enough to throw off the sonar long enough to cause issues

"Hydro-Hydrofoil" will officially be stuck in my head all day, I love it

This is SOOO cool! Now you need to use the same system on a hydrofoil, rideable kayak.

This is actually very impressive !

This reminded me of a pwc Yamaha made in the 80s the OU-32... They only made one but imho it was ahead of its time. It looked like it was hard to get on plane but when you did it was pretty awesome.. Anyhow I was thinking it could actually be a viable pwc now with your flightcontroller/lidar setup. It may be something you want to take on for a future project. There's some old vids of it here on RU-vid if you're interested.

an absolute BANGER after a good bong hit, you guys aint ready for this

WOW! You're right across from Seattle. Love the content. SUBSCRIBED!

these songs are getting better and better

Interesting: I am working on a hypothetical design for a foiling boat and have settled on hydrostatic pressure sensors. I have seen physical feedback levers that skid over the water, this, and manual control in foiling boats. Your boat’s small scale doesn’t help the feedback, mechanical or otherwise, especially given the short time interval. It is interesting to see so many different solutions to similar problems. :)

Seeing the footage cut in from the Ekranoplan 2 and solar glider, along with the sunset shots towards the end of this video made me realise that you have the best B-roll (A-roll?) in the game. I've been watching your channel for a long time but it just never occurred to me because you have a very low key vibe. I guess that based on your job and wealth of experience that it makes sense you would have good footage and particularly good drone footage but I just wanted to give credit where it's due!

Insane work again! I guess, if you go downwind, your hydrofoil will move with the water and this creates less lift.

Amazing project and song as always!

All of this! Thanks for sharing.

What an amazing design! The song is a bonus 👍

incredibly satisfying to watch

Building little gas motor cars as a kid, some were three wheeled. I quickly learned that steering from the back with one wheel was unstable. The car wanted to flip around and tricycle. You would get the same effect riding a tricycle backwards. Now you see three wheel motor cycles (and even EV's). But the "all" steer with the two front wheels. I suspect you would get better directional stability if you steered with the front two foils and left the rear foil fixed.

Hydro-larious! Well done, interesting & entertaining!

literally saving for this amazing song

Great craft, and your video was great, fun to watch.

Well done m8ty that looks great I was hoping you would get back to this project