Can a HYDROFOIL Fly like an Airplane???

[@Geniusinventor]

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

[@Zimmon375]

And the songs. Just awesome

[@dinhtuan752]

more bots.

[@David.-_-]

I appreciate his hard work. I am able to sleep at night because he figures it all out for us.

[@dinhtuan752]

Also mine

[@iamterfer]

Exactly!! If this dude was my teacher I'd have gone to school more. It's fricken genius how he's educating us about techo science when we think we're just watching him playing with his (expletives deleted) cool toys.

[@TacticalHardlinePro]

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

[@krugtech]

it's crackin me up!

[@SetitesTechAdventures]

I want the music to expand. I was watching Peter Sripols last video and I was wishing it had a song from the only person I have every crowdfunded.

[@koharumi1]

First read this and had no clue what he was talking about. Then heard the song....

[@koharumi1]

Want to see a real life hydrofoil boat? kzbin.info/www/bejne/bYS1eGmMnJt7sM0 This is one in Japan.

[@Hawk7886]

It's a VERY good... Don't even know what to call it - Parody? Reference? Whatever, it's riffing on Bo Burnham's song Jeff Bezos

[@BernardSandler]

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.

[@thomas3793]

I believe the tf35 are computer driven

[@BernardSandler]

@@thomas3793 Thank you so much for sending. It is definitely a sexy craft. But some part of me wants a smaller hack job using accessible technology. Like a little modified hobie cat. Or frankly, even something like a laser with outrigger hulls. Can you imagine being able to cut the waves in something tiny and ludicrous?

[@adit1001able]

Please keep me in the loop if you ever plan to do so.

[@AliBFPV]

Dingys with hydrofoils like the moth, have a mechanical system controlling the trim of the main foil. A wand which bounces along the water pulls a wire that changes the angle on the main flap. You then control the rear elevator with a hand twist grip. In other hydrofoils, there is a newish hydrofoil surfboard with electrically controlled trim control. There’s a video of a dog riding it 🤣

[@BernardSandler]

@@AliBFPV Thank you so much for referencing these! It’s interesting to wonder whether that wand, by tracing the contours of rough water would cause similar problems to the sonar tracing waves. You’d have to mechanically smooth the speed at which it shifts versus doing it using digital filtering.

[@MaxPowersHedgehog]

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

[@RobertKennard]

Solid song, for anyone unaware it's a cover of Bo Burnham's Bezos.

[@MaxPowersHedgehog]

@@RobertKennard I hear the tune, but the wording is all different from the Bezos song. So is this still considered a "Cover" song.

[@RobertKennard]

Christopher Colm I wasn’t really sure what to call it. Maybe an homage. But certainly not a fully original piece. Bo Burnham also has a song Bezo 2. Which is less similar to hydrofoil.

[@MaxPowersHedgehog]

@@RobertKennard Either way it certainly is a catchy tune, and cool that you are aware of this other artist Bo Burnham. Thanks for the nice introduction.

[@koharumi1]

Want to see a real life hydrofoil boat? kzbin.info/www/bejne/bYS1eGmMnJt7sM0 This is one in Japan.

[@cpthomp]

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.

[@snowstrobe]

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 KZbin history.

[@Toast934]

Americas cup is about as scaled up as this tech gets

[@koharumi1]

Want to see a real life hydrofoil boat? kzbin.info/www/bejne/bYS1eGmMnJt7sM0 This is one in Japan.

[@jamesbizs]

You realize he’s just scaling things down?

[@billsheppard9368]

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.

[@robertstewart9989]

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

[@kaijellinghaus5693]

KZbin was very quick to recommend this to me 👀

[@dinhtuan752]

more bots.

[@minecrafter0505]

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.

[@abcdefg4570]

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.

[@Here_is_Waldo]

Where would you fly them?

[@friedtomatoes4946]

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

[@ScrubsIsee]

That sure will be their next project …

[@frog8220]

to regular plane to ram to scram plane. To spaceplane, to rocket.

[@friedtomatoes4946]

@@frog8220 I mean the first three are already in development in Britain. They're working on a plane that goes from regular plane to scram plane to space plane. And ironically at the end it uses rocket engines

[@ruftime]

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

[@tibby934]

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!

[@DanielBallinger]

As a novice wing foiler... if you can get the hydrofoil in the correct part of the wave you can generate much greater lift. Generally up on the leading edge of the wave. Conversely, the trailing edge can decrease your lift.

[@tibby934]

@@DanielBallinger I understand what you mean - you do gain kinetic energy when you "ride" the wave & it'll both propel you forward whilst generating more lift. However, when the waves are relatively small and the waters turbulent, it'll be hard to synchronize with riding the wave as can be seen at 7:47. As a consequence you'll tend to fly and then drop your nose cyclically.

[@koharumi1]

Want to see a real life hydrofoil boat? kzbin.info/www/bejne/bYS1eGmMnJt7sM0 This is one in Japan.

[@leifhietala8074]

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.

[@brendandor]

I think this would make it worse, as there would be more spaces for weeds to catch. A simple wiper that's mostly covered might work, but again introduces more snag points.

[@orppranator5230]

Or make the leading edge razor sharp.

[@DaleStLouis-xb5mx]

Design sponsons to turn 360 degrees. When necessary, slow speed and slowly turn them until clear. Maybe one at a time.

[@olsmokey]

What's wrong with reverse?

[@MoX914]

Seems a bit dangerours, but my first idea was to attach razor-blades to the leading edge.

[@bloitus]

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

[@Hawk7886]

If you liked the song, check out Bo Burnham's stuff, since it's an homage to his Jeff Bezos song from his Inside special.

[@jack-o-wack-o3666]

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

[@FARMERHARDY]

Omg jack o wack long time

[@dinhtuan752]

more bots.

[@ShubhamBhushanCC]

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

[@asliceofloaf1984]

Add in normal flight and ground effect too. Could prove to be a great experiment on the most energy-efficient mode of transportation over water

[@Toast934]

Hydrofoil efficient for low medium speed, planning efficient for high speed

[@GoldenCroc]

@@Toast934 Indeed. I would also think hydrofoils are less efficient on a "light" vehicle relatively ( Or rather, the low weight makes it even more sensitive for speed/efficiency?). I wonder if this vehicle wouldnt be more efficient without the hydrofoils at anything but very, very low speeds considering its low weight with a correctly designed planing hull. Thats not to say its wasted, this is a very fun and good engineering excercise.

[@simongonzalez1793]

I have heard hydrofoil boats are almost 80% more efficient than regular boats. Source: Candela; a hydrofoil company, so not too reliable lol

[@Toast934]

I think under the 30ft size without a need for excessive top end speed, foils are fantastic. However in my own experience in playing with boats if you care about top end speed, you can never get away from the foil drag in the water. Whereas a planing hull will eventually outperform a foil, at around the 30 knot mark. The americas cup boats seem to be an exception to this, however they have immense sail carrying power to push through the relatively small foils they carry. The cup has had issues of making their chase boats (both media and rescue ) go fast enough to keep up.

[@recklessroges]

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.)

[@toddmarshall7573]

Your depth sensor idea would be susceptible to waves. You don't want that.

[@fonesrphunny7242]

I imagine the weed would just stick to the finger and get wrapped around the riser.

[@koharumi1]

Want to see a real life hydrofoil boat? kzbin.info/www/bejne/bYS1eGmMnJt7sM0 This is one in Japan.

[@SocksWithSandals]

You are blessed to have a mate like Colin.

[@inofarr8622]

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

[@inofarr8622]

God dam spambot they're everywhere

[@dinhtuan752]

thanks for your 18+ spam. Again, I have another new YT Spambots Content User: Inofarr for reporting this bot.

[@nmnmnm35]

@@dinhtuan752 can you report my wife for not playing with my ass?

[@moritzbohnenberger3713]

@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!

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

[@cuberyllium]

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

[@runforitman]

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

[@Michallote]

you also have air-driven propellers so it is indeed loosing thrust by going in the same direction

[@chinchinlovs6563]

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

[@dirtshower250]

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.

[@shitfaced6585]

Thank you to rctestflight for posting this video!

[@Frorideism]

Dope Hydrofoil song dude

[@dinhtuan752]

this is a bot.

[@Frorideism]

@@dinhtuan752 What? Naah, Anna seems to be a very special girl! He's(?) a light day with music flowing extravagantly and fun, I mean Anna seems to be a very inspiring princess star person and we all need to understand it. Anyhow, watch her bootyclap some whipped cream in the above link LOL.

[@dinhtuan752]

I mean the bot, pls search for *"youtube spambots."*

[@TheUAVpilot]

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.

[@PuppyKat404]

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

[@crackedemerald4930]

maybe make the arm holdy things angled so it just sweeps them down

[@PuppyKat404]

@@crackedemerald4930 I was thinking that wouldn't work because the hydrofoils have a T point for the weeds to get stuck. But a hydrofoil like the IMOCA 60 without that T junction could be swept back to achieve this! Also you could achieve a tighter turn rate with the IMOCA design at is gives a righting force.

[@crackedemerald4930]

@@PuppyKat404 it could have a little lip where every stucked weed slips off downward

[@kadmow]

@@crackedemerald4930 - J-foils can be shaped to reduce the problem of catching flotsam with continuous aft sweep- probably not perfect.. (pitch control on a blended J-foil involve tilting the whole foil) - a J-foil can also be designed with different regions optimised for lift at different speeds - including supercavitating tips and inherent height limiting - sudden foil ventilation is bad.

[@ryang656]

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

[@owenyacoe5100]

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

[@dinhtuan752]

more bots.

[@owenyacoe5100]

@@dinhtuan752 I know right it’s like every time I comment on anything

[@dinhtuan752]

reporter

[@owenyacoe5100]

@@dinhtuan752 thanks idk why I never thought to report them

[@dinhtuan752]

I use this application on my laptop.

[@XxMadRiverxX]

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!

[@RossHasAdrone]

Waiting for the Spotify album to drop ⏰

[@RossHasAdrone]

JK I BOUGHT THE ALBUM ON BANDCAMP

[@StuArts-Kustoms]

Little boat Big journey is a #1 Hit song for sure

[@dinhtuan752]

more bots.

[@Billydrives]

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

[@jetdekkrslet]

I love the song

[@toddmarshall7573]

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.

[@j6sj7]

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

[@josephkey9680]

Bro! So cool. I just noticed Mount Rainier and I was like OK cool… he lives in Washington. And then that shot of the pusher RC plane in the desert environment… WTF!!!! That is Sentinel Peak in the Saddle Mountains in Eastern WA. I live only 10 minutes away. Small world 😂 I’m a mechanical engineer who works at hydroelectric dams in the area. Thanks for the inspirational and informational videos! WA represent 👊

[@Spocket]

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

[@tesseractcubed]

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. :)

[@charleslambert3368]

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

[@tadw6186]

Maybe add an active seeweed remover? The leading edge could have servo razor scissors or some crazy contraption.

[@ExtremeSquared]

That Bo Burnham Jeffrey Bezos cover slaps.

[@SirWilliamification]

Could have given credits tot je original song though...

[@ExtremeSquared]

@@SirWilliamification Meh. Parody is fair use.

[@dinhtuan752]

more bots.

[@mozkitolife5437]

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

[@MatthewNovoselskiy]

The music!!😂 I can’t stop laughing!!

[@dinhtuan752]

more bots.

[@adraintokyo7994]

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 !

[@JH-tc3yu]

Addictive tunes ¯\(◉‿◉)/¯

[@dinhtuan752]

this is a bot.

[@m01flores]

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

[@Tunneling_]

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

[@WellRoundedWoodsman]

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

[@sparkmanstudios]

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

[@nicjansen230]

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

[@RubyS.1]

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

[@wumboworks]

Your amazing channel is what pushes me through COVID

[@kevinknutson4596]

The music is, as always, 10/10 perfection.

[@BluSTi]

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

[@AimlessMoto]

The above and beyond song crafting really puts the cherrys on these technologically marvelous cakes.

[@arneperpar7994]

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

[@cyrillblache8303]

Hello you can check the original from Bo Burnham, title is Jeff Bezos.

[@FilosophicalPharmer]

Downwind solution >>> RETRACTABLE SPINNAKER!! ☺️👍🏼 (This vid makes me so happy!! Nice work!)

[@ClangandChiill]

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

[@lucaslittmarck2122]

Supercool to get such a good stability from this small of a vessel. I'm thinking a 3m wide and 6m long vessel and this system should work marvelous!

[@MeepMu]

These songs keep getting better and better!

[@wakjagner]

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

[@EatsLikeADuck]

The Colin Fox ad has a definite Strongbad vibe to it.

[@BlehhBlah]

The song just adds to the awesome atmosphere I'm feeling watching this video

[@Jimmy___]

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!

[@Techie_ASMR]

these songs are getting better and better

[@JKDubski]

10:14 COLIN FOX OMG!!! Low key his biggest fan. You are very lucky to have such a talent at your disposal. (Also tell Colin I miss him). Great Video!

[@Nick-lv2zb]

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.

[@saqlesaoul223]

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

[@jonwestman4176]

Your funky beats are low-key addicting

[@randomv3iwer]

Music was the cake in the video The engineering was the cherry on top

[@ChernobylPoptart]

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 KZbin if you're interested.

[@valiantGLX79]

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

[@liamjohnson2474]

I came for the RC but I stayed for THE FIRE MUSIC 🔥🔥🔥🔥🔥🔥🔥🔥 I still hum the sea shanty from the unlimited range kayak video

[@codycarse]

That hydrofoil song definitely had a twentytrucks vibe. love it.

[@Lucaspc99]

Love this video soundtrack, it's simply amazing

[@ericharrison6418]

The song was the best thing I’ve seen today. Make this clip go viral please.

[@jamesdonaghy9143]

If the downwind instability is surprising then I guess you've never wingfoiled. Great vid. Love the music track too.

[@bereftm]

Best song yet, actually made me want to listen to the song with no video

[@Smokkedandslammed]

Colin is the best SoundCloud rapper alive 🙏🙌💯🔥

[@scottquigley3887]

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

[@nickbaddorf2673]

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

[@JanBoothius]

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

[@CapnSlipp]

Here’s another idea- resistance measurement sensors on each of the 3 legs. Basically two open terminals an exact distance from each other (1/4”?) repeated up each leg every inch or so. Apply voltage (low amp, IIRC), read resistance values, and calibrate to tell the difference between a body of water and latent surface water or water spray. And then, of course, sensor-fusion that data with your sonar to minimize errors from either sensor type (basic sensor fusion: average the result values together; slightly more advanced sensor fusion: look at the difference between the conclusion of each type of sensors and throw out values that don’t make sense temporally, and across sensors; advanced sensor fusion: a bunch of calculus and statistics, I guess).

[@emotodude]

This really needs to be a sailboat

[@u4ia420]

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

[@lacucaracha111111]

The downwind issue is because of props. Props push air behind them and pull forward, Heavy downwind counteracts that. You are talking about the sacale of a small cessna trying to take off in a hurricane blowing at it from behind while having the brakes on. -Overcome water resistance, while trying to shovel air back (and itself forward) -while the air around it tries the opposite

[@e-alf-1]

LOL the music, awesome video btw

[@mattbarr2321]

okay that song remake was the highlight of this video, dying of laughter over here

[@narnasqueneth]

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

[@tecnosonicboy]

I don't know if I'm more amazed by the work, or by the the song 😂

[@GeneralLeeStupid1]

A lot of people seem to be overthinking weed clearing. The simplest would be to just reverse the boat for a few feet. The weeds would no longer be pinned to the foils and should be pulled away by the drag of the water. It would come off plane, but thats not too big a deal with how qick it gets up. Also sweeping the vertical spars back would help too.

[@saqibsultantemuri2437]

that 80's Hydrofoil track. Dude, Awesome! oh yeah, the tech is nice too.

[@kianwerner7487]

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

[@zoq2]

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

[@System32F]

I think I have a solution for the sea weed problem try using some very sharp razor blades on the leading edges It would for sure cut through sea weed, Try and design it so they are easily replaceable because they could rust and get dull after some use, If its not good try using a bar that can turn with a small motor on the leading edge, You could activate them every minute or two so when it builds up it would push or roll the weeds away more complicated but probably will work

[@Flieger46]

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