Your wing is actually better than you know because there is a special high lift coefficient only possible at the surface of water where you can have a higher angle of attack without stalling because the surface of the water curves down without detaching behind your aerofoil, unlike the stall in bulk air or liquid. By operating just below the surface with a big wing, you have the ultimate flexibility for angle of attack range, not possible anywhere else in aerodynamics! Congratulations, you're operating in a unique domain where no bigger or deeper hydrofoil can go: the ultimate sweet spot for all aerodynamics.
This is interesting, almost like ground effect for a traditional wing, except ground effect increases efficiency whereas you are saying in this domain there is an increase in maximum lift coefficient. Based on the large wake when the foil is shallow, unfortunately this appears to be a high drag domain.
@@dash0173I dream of creating personal transport for inter island travel. I live behind the beach in Koh Samui, Thailand trying to teach Thai people about solar power. The Opener Blackfly is faster!
@@eamonia i once painted a 4m rc glider in chrome😅 holy 💩, what was that haha. The suns reflection made me blind when i thermalled haha🤣 i had to scale it down to the wingtips and the cockpit😅
Amazing. When you said powered wheelchair for the sea it made me think how cool this would be for persons with disabilities as a sit down version. The slow, docile speed would be perfect. I’m trying to make a daily usable, off-road wheelchair as we speak and you’re def an inspiration.
@@ArmchairDeity It would definitely be better in a sort of recumbent seating position to lower the center of gravity and make things a little less unsteady in the seat
@ it would need a few things… the wings need to be able to be lifted up against the bottom of the board for shallow water. Automatic pitch control would be nice. Seating up off the deck is essential (getting up/down is my issue, I can’t use my knees like that anymore), and the propulsion needs to be able to be powered by both the battery and by turning a generator with a hand or foot crank. And possibly include a fore AND aft wing for solid stability…
@@ArmchairDeity in previous videos he used lidar sensors for automatic pitch control over the water. The amount of power output seems like it would exceed the wattage of a hand or foot crank, unless you make Peloton leaderboards or something
5:10 that board needs pedals for direction and a butt emplacement, with a back rest. That way, you can leave your hands free for activities and use your back to control pitch, while steering with your feet.
Or just fit it with a stabiliser, rudder, flight controller, decent seats, autopilot... And sit back and relax while it cruises you across the lake to your new favourite fishing spot 😂
9:26 can be solved by wing sweep. I had a feeling during the build it was gonna be majorly pitch sensitive. I would think a 15° wing sweep would dampen out the pitch sensitivity.
I was thinking a greater sweep would help with stability without adding a stabiliser. Although greater sweep would likely induce more roll during differential thrust turns
The jugs are normally crab pot buoys. Either illegally crabbing (they purposely pull the bouy underwater to avoid being seen, but they can still pull them with a hook), or they didn't use enough line, and the tide sank the buoys. Sometimes, they are also used and sank to mark mooring anchors for the short term so that the line doesn't sink when replacing a mooring ball.
Learning to ride it as it is just like Wrights' 1903 Flyer. They had to continuously horse it in pitch (using the canard) because the main weight was BEHIND the CG. Same problem with the 1905 Flyer. They didn't achieve auto-stability until they got main weight FORWARD of CG. To thier great credit, they had become expert at "horsing" it in pitch, just as you're doing. Had they achieved auto-stability first, they woulda missed all the fun learning.
Not sure what your talking about. Tail heavy aircraft is pitch sensitive and a killer. I learned the hard way back in the day when we built our own models . Maybe you got it backwards, being nose heavy would make you want to horse up on the canard.
Daniel, have you considered adding a small canard on a shorter mask at the front of the board? A canard would help with pitch stability and help keep the main wing from stalling as could be positioned to stall first, or come out of the water if alpha got too high. Could experiment with size of canard from very small to small. Another option is adjusting canard angle based on how close it is to the water surface (a mechanical float arm, or using sonar). Adding wing dihedral would make tips come out of water when riding higher, which should allow to cruise faster (or a gull style .. down hedral inboard, with up hedral past mid-span). For added height and fun, could build a bi-wing hydrofoil. Add smaller wing below the larger upper (solar) wing. Can start slow, and climb higher to go fast and be more maneuverable. You could have the worlds first, and largest bi-foil!
I had the same idea ,but checked the comments first , I sort of had a picture of it with seating and slow stable cruise for us not so young water lovers who hate the noise and speed of jet skis
I was thinking, if you ever wanted to try to make one that is speed oriented, and wanted it to looks "science fiction." I'd recommend building a reverse trike foil. 2 jet plane shaped foils in front, 1 in back - all powered with water jets. You'd basically be riding on 3 underwater jet planes flying in formation. :D
You may have inadvertently hit upon something unique here -- an e-foil design that is not only more approachable due to its slower speed and more docile handling characteristics, but also one that is cheaper & simpler to build because of its lower power draw requirements!
You should check out if a negative sweep of the wing to make it less prone to changing cg. The open class gliders as the eb28/eb29 are very sensitive regarding changes to the center of gravity. The Arcus or DuoDiscus with negative sweep are more robust to not optimal cg positions. Maybe be check out if this also applies to your hydrofoil. Thanks for the great video
put the wing to the top it will be very stable. and it needs bigger size to work in the air than water. then you might fly! let's call this project 'airplane'
I've been watching since the Slow Trainer Depron Builds, Cargo Condo - The E-Foil Board could be out of Subnautica, thats how good it looks and drives. Big Respect on the Progress + Inventions.
at this point you're almost making the Mehve from Nausicaa of the Valley of the Wind! Would you consider swapping the board for something with much less surface area? I feel like have better visibility beneath you would be more interesting and useful.
Wouldn't it be better if you increased the chord of the hydrofoil ? You're using something akin to a high aspect wing of a drone.. What about something more like the wind on an F15 which is more Delta shape. Wouldn't that help with your pitch sensitivity?
Modern fighter jets generate a large amount of their lift by vortices that roll over the top of the wing and cause low pressure areas. That is not the regime the hydrofoil operates in, also has no direct connection with pitch stability.
It's wonderful and amazing to see you discovering and loving this world of hydrofoiling too! I'm passionate about surf and wing foiling and I think I'll stay that way for life.
Could you put two stabs, one forward and one aft, such that the aft one provides nose down and the forward one provides nose up? The idea being that they cancel eachother out when both are in the water, but if one leaves the water the remaining one will correct your pitch.
Make it a V shape. Then use a balloon in a channel to increase lift at the tip of the V by pumping it up to move the center of lift forwards or back along the back of the V.
That's how the original Navy hydrofoils controlled their vertical height. More foil in the water equals more lift, less is less. It also produces a righting moment like aircraft dihedral.
I was waiting for your realization at 6:32. Standing is such an improvement. Embrace the lack of roll and use dual props as God intended. Nice work man!
They're fairly common at least where I'm from for people who want to keep their buoy lines out of the way when not in use. For setting up courses, or for mooring lines for instance.
I would love to see a version of a large wing with electronic controlled ailerons that adjust pitch automatically with a microcontroller & accelerometer chips. Making it a sit-down, skill-less, consumer product would be awesome!
1:01 you're pumping too fast, too erratically. You need to slow down and follow a beat. My suggestion is to take a waterproof pair of headphones and play a metronome beat over them. Until you find the right cadence, that is.
Why not add a tail kind of like a whale off the back? Just big enough to increase pitch control but thin and small enough to not upset the whole balance?
Put this wing on the back of your Boston Whaler and convert it to a canard design or a tandem wing. If it needs so little power to take off you will have a very efficient boat. When you turned with differential thrust the turn radius look just as sharp as your Boston Whaler turn radius and if the front wing will have any control surfaces it will increase the roll even more. Maybe even the solar panels will generate more electricity than drag on a sunny day if you sail slowly but wind can knock you over if it hits the panels. Thanks you for the video!
The first hydrofoil boats used surface-piercing v-shaped dihedral foils on a typical v-hull for the exact reasons you mentioned. Very cool project and excellent presentation through experimentation... glad I didn't have to make one ;) . Only I don't get to have as much fun as you do! Thanks for the excellent build. Now just put the thrusters below the foil for top speed testing.
If you add a small tail boom like a real foil board and bring the motors closer together in the center, it will smooth out the porpoise effect and allow you to roll left and right. And yes I am a Prototype Engineer/CNC Machinist for over 45+ yrs. 👍 I have Been surfing waves in San Diego(my home) over 55 yrs.
Great setup! Have you considered experimenting with a double-wing biplane configuration? By splitting the foil into two stacked wings, each with half the width but maintaining the same total surface area, you might achieve enhanced stability and reduced sensitivity to pitch changes. This could also improve control in turbulent conditions.
You can get more roll from this if you stagger your stance. I see you ride right foot forward, so you can more your right foot towards heelside, and left foot towards toe side and keep the same width, but gain a ton of leverage for roll. It will allow your body to be facing slightly more forward as well, which just feels better once you get used to it.
Differential thrust for the yaw axis, I love it. That low stall speed is bonkers. Keep it up! Also I want to pumpfoil in to one of those wakes I'm pretty sure there's some lift to be had there! You've basically built a Hydroflyer. 🙂
Awesome! A thought occurs to me that the hydrofoil might handle much more smoothly in pitch if your motors were mounted in such a way that the thrust axis stays horizontal, independently of the wing's angle of attack. The way it's set up now effectively amplifies pitch instability because pitching either up or down reduces the horizontal component of thrust, meaning your speed bleeds off more abruptly. For pitch-up, this results in a higher tendency to stall, and also a "stall hysteresis" where the angle of attack needed to escape stall is significantly lower than the angle needed to enter the stall. For the opposite case, the result is a similar instability - a pitch-down results in lower forward thrust, which slows the wing, and momentum carries your weight forwards leading to a further pitch-down moment, resulting in positive feedback, and a tendency to slap the nose of the board. Of course, it might be a little tricky to decouple the motor angle from the wing's angle without active control... Perhaps mounting them behind the wing on spars that can flex vertically (simple spring steel strips might work) and attaching small vanes to the motor nacelles to help them to align with the direction of movement?
gettin close. Out of those it looks most like the later wings on the american boat from the previous round. The ones that Alinghi bought to go on the hull they got from the kiwis.
Making my own hydrofoils is never something I'd have thought about or bothered to mess with, but then I look at you and dang, I'm suddenly really glad you're living your life Awesome, rock on
No No, For roll add windows servos 5~10kg servo (or linear motor for torque) and a gryo at the center of the board, calibrate it and let the roll be automatic. This will be fun to ride.
It's the double boom design preventing weight shift steering, a single boom on the center line would more closely mirror a traditional wake board. With a few simple edits and a montage throw in we could be watching it in a couple of weeks.
Program a switch in your transmitter to reverse your throttle. Then you have full throttle fidelity but still have reverse on a switch when you need it.
Yep. That's what I did with my proportionally steered RC boat. Neutral to full forward is available in forward mode, to prevent accidental reversing of the motors at speed. Flick the reverse switch and it goes about half forward through to half reverse. That allows for spinning on the spot, but reduced speeds prevent silly accidents trying to go backwards. I probably should just stick the flight controller in that I was always meaning to put in there and let that handle it instead of the confusing mix I had to create on the rather limited FlySky transmitter I use.
IDEA: An negative AoA v-tail attached to the board at the back so that the total in-water span of the tail varies with board height and angle. More nose up = more lift in the back, higher board = less 'downforce' in the back, both resuling in a nose-down moment. May also add some roll stability.
So two choices, add more sweepback to dampen the pitch sensitivity, or as you said, go for a tail. If a tail, I would look at creating a tetrahedron of struts (left wing, right wing, tailboom), and mount a plastic outdoor chair at the apex with sufficient floatation for when stationary (You could always do this as a canard as well). Then I would look into how to have active controls (ball joint gimballed cruciform tail?) and 'fly' it from a sidestick. Just imagine the site of some dude sitting on a garden chair as it flies across the water, seemingly with no visible means of support... (ooh, clear acrylic legs 0_0 )
the vibrations will be from turbulence induced vibrations from the vertical legs I am guessing. add some X struts across the length that very across length so the res freq is different across the entire strut.
try to create a wide narrow, venturi effect, on the wing in front of the propellers, so that a more concentrated water current arrives and avoids them going into cavitation, to avoid the formation of bubbles the internal surface of the tube could be channeled or have an upper redan that lets the bubbles come out before the propellers
Dude, awsome improvements over the years with the foil projects. so glad to see it. After this handlebar idea, I had a vision of some kind of e-foil 'jetski' (better handelling and ergonomics) and maybe trying two foils, one in the front and one in the back. maybe it's too crazy on an idea, but would be interesting to see. Anyway, congrats for the work.
To increase the foil’s sensitivity to roll inputs the foil span should be curved. If you can imagine a flat foil would be the least sensitive and a perfect radius would be the most. So to get the desired roll sensitivity you find a balance between the two.. The shape a paraglider wing is a good start.
I love it. I've gotten too old and rickety for a jet ski. I am sore for days after a few hours at the lake on that. I miss exploring the lake more intimately than the pontoon allows. A calm, sedate efoil would be great. Put an elevator and a seat on it and I'd buy one.
My opinion is you already have the optimum wing. Maybe add some dihedral ( with fence) to the wing ends, bidirectional steering with motors, then solve the pitch problem. Maybe a canard? Having a V wing gives stability and sheds weeds. Also i like a sit down on low chair option. I am a cruiser not a speeder. 1 hour or more ride is just right for exploring fast and not using petrol.
all these experiments are really fun plus using cheap materials. all the commercial foils for wing foil, wind foil etc are crazy expensive. unless there is some big breakthrough in CF manufacturing cost, I think sport foil will remain CF like enthusiast bikes, but like ebikes, efoils. will focus on affordability and value. you could imagine a single battery /motors and different propellers/foils like small fast spinning propellers and small foil to do high speed/sharp turns for short periods or low rpm, large propeller and foil to cruise long distance with optional passenger. I think the enabler for efoils will be advance in electronic and software.to make them stable and easy to control without stabilizers similar to how hoverboard/segways made easy and affordable to have e mobility with just two wheels an two motors
If I had the opportunity to hang out with anyone in the world for one day I would pick you! You are the coolest dude!! If I had even 1/10th the skills you have... 😱 I have a beefy off-road wheelchair, that's pretty much a mountain bike for paraplegics. My dream is to make it electric, dual motor, wheelie capable, and also RC capable for if I need to fetch it. 🤠
A guy in my town has a 3 wheel electric wheelchair. It's got 20" BMX style wheels and disc brakes. I've seen him keeping up with traffic through the school zone near his house... So around 40km/h. I suspect it gets a bit more than that when there's no cars holding him back. Technically it's illegal where we live, but imagine being the cop who fines him for using his wheelchair too fast 😂
"It's nice that the prop breaches the surface because then you know you're getting too high... " That's what the pilots at Aeroflot used to say on the flight back from Cuba.
If you're standing and using handlebars, you really can use anything instead of a board. It would look really cool if you were standing in a semi-sphere, which would maybe allow you to stay dry when stationary (like a micro-boat). The wing would probably need to be neutral (not floating)
You should build a gyro controlled weight shift system to control pitch and/or roll.You could throw a core x/y 3d printer on the board under your seat and throw a bunch of lead on the printhead and you would have a good start.
Forget the Segway, dude just made the SegWave
I forgot about the Segway over a decade ago.
I hate that people now spell segue as segway due to that product
Seagway
Let's all keep away from sea cliffs
SEGWAVE DAAAMNN thats the name
"I tried to get him some help, the voices don't stop man", awesome!
the commentary had me rolling
Made me dribble coffee onto my shirt.
Perfect timing
5:23 There goes Daniel...
his friend looks like justin trudeau. i don't mean that in any way other that it's funny
You should go full size. Put wings on your whaler.
THIS! Should extend the solar range loads!
would be soo cool to see
Came to say basically the same thing. Then he could do another endurance test with the solar panels.
Navier in the SF Bay area is doing this!
Flying boats man!
@@tin2001 He'd run out of supplies and starve to death.
Your wing is actually better than you know because there is a special high lift coefficient only possible at the surface of water where you can have a higher angle of attack without stalling because the surface of the water curves down without detaching behind your aerofoil, unlike the stall in bulk air or liquid. By operating just below the surface with a big wing, you have the ultimate flexibility for angle of attack range, not possible anywhere else in aerodynamics! Congratulations, you're operating in a unique domain where no bigger or deeper hydrofoil can go: the ultimate sweet spot for all aerodynamics.
That’s a super cool fact! Makes sense but is totally not something the average person thinks about
This is interesting, almost like ground effect for a traditional wing, except ground effect increases efficiency whereas you are saying in this domain there is an increase in maximum lift coefficient. Based on the large wake when the foil is shallow, unfortunately this appears to be a high drag domain.
@@dash0173I dream of creating personal transport for inter island travel. I live behind the beach in Koh Samui, Thailand trying to teach Thai people about solar power. The Opener Blackfly is faster!
*hydrodynamics
@@naphion Maybe we could call it the surface effect, because it happens close to the surface between two fluids with different densities.
Put mirrors on the "legs" that separates the board form the wing. It would look like you are hovering.
Do it! Mylar might even do the trick. It's super lightweight and would be easy to apply.
Painting the board and wing something less contrasting than white.
And change it so you can control lying down with a superman flying pose.
Chrome paint?
@@jasmijnariel I think we have a winner.
@@eamonia i once painted a 4m rc glider in chrome😅 holy 💩, what was that haha. The suns reflection made me blind when i thermalled haha🤣 i had to scale it down to the wingtips and the cockpit😅
congratulations on making the worlds first hydrofoil segway!
Was thinking about this as well - add the Segway stabilizing hardware and software.
@@lyrebirdinusayep e foils that control pitch and height with just a very simple design and just some cheap electronics could be a game changer.
I was going to say congrats on the worlds first hydrofoil stand up paddle (SUP) board. Stall speed is not that far from sup speed, right?
I know they're all thinkin im so wet and nerdy
Ok, so... now remove most of the board, leave just a square that you actually stand on. Let it be a goofy hydrofoil-scooter
I think it would be hard to control when the hull is in the water unfortunately
The wake that it makes is pretty crazy
That's the special high angle of attack without stalling only possible near the water surface as the water curves down at the interface
Amazing. When you said powered wheelchair for the sea it made me think how cool this would be for persons with disabilities as a sit down version. The slow, docile speed would be perfect. I’m trying to make a daily usable, off-road wheelchair as we speak and you’re def an inspiration.
As one of those people I have a few ideas to make this thing insanely useful for people who wish they could do the whole kayak thing and just CAN’T…
@@ArmchairDeity It would definitely be better in a sort of recumbent seating position to lower the center of gravity and make things a little less unsteady in the seat
@ it would need a few things… the wings need to be able to be lifted up against the bottom of the board for shallow water. Automatic pitch control would be nice. Seating up off the deck is essential (getting up/down is my issue, I can’t use my knees like that anymore), and the propulsion needs to be able to be powered by both the battery and by turning a generator with a hand or foot crank. And possibly include a fore AND aft wing for solid stability…
@@ArmchairDeity in previous videos he used lidar sensors for automatic pitch control over the water. The amount of power output seems like it would exceed the wattage of a hand or foot crank, unless you make Peloton leaderboards or something
Have you seen Not a Wheel Chair from JerryRigEverything? He has a line for off road wheelchairs and has a few videos on exactly that
5:10 that board needs pedals for direction and a butt emplacement, with a back rest. That way, you can leave your hands free for activities and use your back to control pitch, while steering with your feet.
that way he could masterbait while riding it
Or just fit it with a stabiliser, rudder, flight controller, decent seats, autopilot... And sit back and relax while it cruises you across the lake to your new favourite fishing spot 😂
We all need a masterbaitor.
9:26 can be solved by wing sweep. I had a feeling during the build it was gonna be majorly pitch sensitive. I would think a 15° wing sweep would dampen out the pitch sensitivity.
yes sweep would help, but a tail is way more effective and easier to tune for stability.
@@aerbon And a tail can be made to be automatically pitch stable, making for an even more relaxed ride.
@@insertphrasehere15 so can a wing if you sweep it enough and change the pitch at the tips, but that's why i said the tail is easier to tune.
I think this is the best method. A stabilizer is good, but adds drag.
I was thinking a greater sweep would help with stability without adding a stabiliser.
Although greater sweep would likely induce more roll during differential thrust turns
The jugs are normally crab pot buoys. Either illegally crabbing (they purposely pull the bouy underwater to avoid being seen, but they can still pull them with a hook), or they didn't use enough line, and the tide sank the buoys. Sometimes, they are also used and sank to mark mooring anchors for the short term so that the line doesn't sink when replacing a mooring ball.
I love people like you. I would have _never_ have learned that otherwise. Thanks for taking the time to educate the masses, buddy. 👍
Someone commented on another video that the jugs appeared in that the jugs there are markers for an annual race.
If you’re talking about the white jugs floating just below the surface in lake Washington, they’re anchoring points for the seafair log booms
Learning to ride it as it is just like Wrights' 1903 Flyer. They had to continuously horse it in pitch (using the canard) because the main weight was BEHIND the CG. Same problem with the 1905 Flyer. They didn't achieve auto-stability until they got main weight FORWARD of CG. To thier great credit, they had become expert at "horsing" it in pitch, just as you're doing. Had they achieved auto-stability first, they woulda missed all the fun learning.
Not sure what your talking about. Tail heavy aircraft is pitch sensitive and a killer. I learned the hard way back in the day when we built our own models . Maybe you got it backwards, being nose heavy would make you want to horse up on the canard.
"... but the voices don't stop." Now THAT is hilarious.
It's not that funny Mike
Makes you wonder if successful RUclipsrs are just talking to themselves all day even when the cameras are off 😂
My favorite quote “floppy meat legs”
It wasn’t “annoying semen between your toes”?
😆😜
Now you should try a variable geometry swept wing e-foil, like an F-14 Tomcat of the sea.
Daniel, have you considered adding a small canard on a shorter mask at the front of the board?
A canard would help with pitch stability and help keep the main wing from stalling as could be positioned to stall first, or come out of the water if alpha got too high. Could experiment with size of canard from very small to small. Another option is adjusting canard angle based on how close it is to the water surface (a mechanical float arm, or using sonar).
Adding wing dihedral would make tips come out of water when riding higher, which should allow to cruise faster (or a gull style .. down hedral inboard, with up hedral past mid-span).
For added height and fun, could build a bi-wing hydrofoil. Add smaller wing below the larger upper (solar) wing. Can start slow, and climb higher to go fast and be more maneuverable. You could have the worlds first, and largest bi-foil!
I had the same idea ,but checked the comments first , I sort of had a picture of it with seating and slow stable cruise
for us not so young water lovers who hate the noise and speed of jet skis
I was thinking, if you ever wanted to try to make one that is speed oriented, and wanted it to looks "science fiction." I'd recommend building a reverse trike foil. 2 jet plane shaped foils in front, 1 in back - all powered with water jets. You'd basically be riding on 3 underwater jet planes flying in formation. :D
no annoying seamen between your toes 💀
3:57
Bro I heard it too, I’m dying lmao
Seam in-between your toes, dirty boys 😊
@@newfangledcypher5309 aaa ditto
*semen*
As a long-time viewer who recently moved to Seattle; I must say, it's really neat recognizing places in your videos now.
That Bombas sponsor spot was a really good...pitch.
Think of how rich you could be if you successfully brought this concept to the consumer market.
You may have inadvertently hit upon something unique here -- an e-foil design that is not only more approachable due to its slower speed and more docile handling characteristics, but also one that is cheaper & simpler to build because of its lower power draw requirements!
I wonder if it needs tilting handlebars like a jet ski? I want to see you put like 10 foot stilts(?) and see how high out of the water you can get.
You should add a canard type horizontal stabiliser up front
You should check out if a negative sweep of the wing to make it less prone to changing cg. The open class gliders as the eb28/eb29 are very sensitive regarding changes to the center of gravity. The Arcus or DuoDiscus with negative sweep are more robust to not optimal cg positions. Maybe be check out if this also applies to your hydrofoil. Thanks for the great video
This channel deserves more likes and subscribes!!!
Lakeside cottagers: 'Hey honey! Poindexter is out flying around the lake again! Grab the binocs!' ❤
Just use the german word. Fernglas!
Fern = Far
Glas = Glass
Haha! I guarantee this has happened.
put the wing to the top it will be very stable. and it needs bigger size to work in the air than water. then you might fly! let's call this project 'airplane'
Long range solar e-foild board?
I've been watching since the Slow Trainer Depron Builds, Cargo Condo - The E-Foil Board could be out of Subnautica, thats how good it looks and drives. Big Respect on the Progress + Inventions.
You're getting real good at pumping.
11:12 Birches love the sea scooter - RCE Test Flight 2024
17:08 You have your first customer there!
0:12 Brooo I got flashbanged 😭
Light mode on
Am I the only one who watches his videos only at night.?
Me to@@lutexor
At 22:08
Another real world Breath of the wild creation
at this point you're almost making the Mehve from Nausicaa of the Valley of the Wind! Would you consider swapping the board for something with much less surface area? I feel like have better visibility beneath you would be more interesting and useful.
Nice! Now some ailerons on the wing and a flight controller running the show 😀
He turned it from a Sea Wheelchair to a Sea Segway.
I love, love, love every time I see a new vid from rctestflight.
3:58 no annoying what??😳
What? You dint think semen in between your toes is annoying? Weirdo…. 😂
I hate it when there’s seamin between my toes.
Semen between your toes.
I guess that happens all the time to some people 🤷
Semen between your toes
That quick, fruitless, flutter kick when testing the prototype at 0:24 was hilarious 😂
Wouldn't it be better if you increased the chord of the hydrofoil ? You're using something akin to a high aspect wing of a drone.. What about something more like the wind on an F15 which is more Delta shape. Wouldn't that help with your pitch sensitivity?
yep i also thinked about that while watching more v shape should help
Yeah, that's what I thought too
Modern fighter jets generate a large amount of their lift by vortices that roll over the top of the wing and cause low pressure areas. That is not the regime the hydrofoil operates in, also has no direct connection with pitch stability.
Just make the whole wing smaller, water is dense af
Skin friction would be much higher, why solve it inefficiently? More mass fore and aft or a gyro would work.
It's wonderful and amazing to see you discovering and loving this world of hydrofoiling too! I'm passionate about surf and wing foiling and I think I'll stay that way for life.
Consider a front and back wing at the same time
Could you put two stabs, one forward and one aft, such that the aft one provides nose down and the forward one provides nose up? The idea being that they cancel eachother out when both are in the water, but if one leaves the water the remaining one will correct your pitch.
Make it a V shape.
Then use a balloon in a channel to increase lift at the tip of the V by pumping it up to move the center of lift forwards or back along the back of the V.
Should say, use a bar on some servos to push the balloon out not neumatic.
Or any stretch fabric.
Think BMW Gina.
That's how the original Navy hydrofoils controlled their vertical height. More foil in the water equals more lift, less is less. It also produces a righting moment like aircraft dihedral.
I feel like I'm watching an aquatic version of the Wright brothers
i've watched the whole thing already
its been out 16 mins
@@Canyouread-f1s Settings -> playback speed -> pick number larger than 1.
@@SledgeOfHouseHammer but who would want to watch a video like that
@@Canyouread-f1s Some people like watching at increased speeds. I don't.
No, I watched it already twice. And once in reverse just to be sure. Get good
I was waiting for your realization at 6:32. Standing is such an improvement. Embrace the lack of roll and use dual props as God intended. Nice work man!
Nice!!!
Now put it on the Boston Whaler
Pitch control via mechanical linkage to handlebars. Dual finger throttles.
Hell, perhaps this efficient enough to be human powered.
What? You're just gonna glaze over the spooky jug!?!
They're fairly common at least where I'm from for people who want to keep their buoy lines out of the way when not in use. For setting up courses, or for mooring lines for instance.
@weatheranddarkness ahhh!
Yeah Coloradan here so not a huge amount of marine exposure lol. Appreciate the reply. 🤘
Hinge the bottom wings with a stabilizer
3:58 🤨
I hate when that gets in between my toes
Again 😅
I would love to see a version of a large wing with electronic controlled ailerons that adjust pitch automatically with a microcontroller & accelerometer chips. Making it a sit-down, skill-less, consumer product would be awesome!
1:01 you're pumping too fast, too erratically. You need to slow down and follow a beat. My suggestion is to take a waterproof pair of headphones and play a metronome beat over them. Until you find the right cadence, that is.
Or just put on Stadium Rave (the spongebob jellyfish dance song)
GAS GAS GAS , IME GONA STEP ON THE GAS…
Why not add a tail kind of like a whale off the back? Just big enough to increase pitch control but thin and small enough to not upset the whole balance?
I think it should have positive dihedral as well. Although it is inverted pendulum, gravity vector still goes down.
Dihedral doesn’t work in water. Turning would be frightening. I have been wind foiling for the last five years
@@1212354a so whadda you know then? 😄
Put this wing on the back of your Boston Whaler and convert it to a canard design or a tandem wing. If it needs so little power to take off you will have a very efficient boat. When you turned with differential thrust the turn radius look just as sharp as your Boston Whaler turn radius and if the front wing will have any control surfaces it will increase the roll even more. Maybe even the solar panels will generate more electricity than drag on a sunny day if you sail slowly but wind can knock you over if it hits the panels. Thanks you for the video!
haha you didnt see my 14 foot efoil !
The first hydrofoil boats used surface-piercing v-shaped dihedral foils on a typical v-hull for the exact reasons you mentioned. Very cool project and excellent presentation through experimentation... glad I didn't have to make one ;) . Only I don't get to have as much fun as you do! Thanks for the excellent build. Now just put the thrusters below the foil for top speed testing.
If you add a small tail boom like a real foil board and bring the motors closer together in the center, it will smooth out the porpoise effect and allow you to roll left and right. And yes I am a Prototype Engineer/CNC Machinist for over 45+ yrs. 👍 I have Been surfing waves in San Diego(my home) over 55 yrs.
thanks for pushing the limits, true innovation and truly showcasing how powerful the foils can be
Great setup! Have you considered experimenting with a double-wing biplane configuration? By splitting the foil into two stacked wings, each with half the width but maintaining the same total surface area, you might achieve enhanced stability and reduced sensitivity to pitch changes. This could also improve control in turbulent conditions.
You can get more roll from this if you stagger your stance. I see you ride right foot forward, so you can more your right foot towards heelside, and left foot towards toe side and keep the same width, but gain a ton of leverage for roll. It will allow your body to be facing slightly more forward as well, which just feels better once you get used to it.
yeah he's definitely got more of a skating stance than a surfing stance here. hips and pelvis should be facing forward.
Differential thrust for the yaw axis, I love it. That low stall speed is bonkers. Keep it up! Also I want to pumpfoil in to one of those wakes I'm pretty sure there's some lift to be had there! You've basically built a Hydroflyer. 🙂
I wonder what would happen if the wings were more swept. It should make it faster, but it may make it more stable?
Awesome!
A thought occurs to me that the hydrofoil might handle much more smoothly in pitch if your motors were mounted in such a way that the thrust axis stays horizontal, independently of the wing's angle of attack.
The way it's set up now effectively amplifies pitch instability because pitching either up or down reduces the horizontal component of thrust, meaning your speed bleeds off more abruptly. For pitch-up, this results in a higher tendency to stall, and also a "stall hysteresis" where the angle of attack needed to escape stall is significantly lower than the angle needed to enter the stall.
For the opposite case, the result is a similar instability - a pitch-down results in lower forward thrust, which slows the wing, and momentum carries your weight forwards leading to a further pitch-down moment, resulting in positive feedback, and a tendency to slap the nose of the board.
Of course, it might be a little tricky to decouple the motor angle from the wing's angle without active control... Perhaps mounting them behind the wing on spars that can flex vertically (simple spring steel strips might work) and attaching small vanes to the motor nacelles to help them to align with the direction of movement?
That wing makes a wake like a freight ship !
Should have 2 smaller wings front and rear and forget about the pitching.
This is awesome. It looks like the foil on an AC75 America's Cup yatch.
gettin close. Out of those it looks most like the later wings on the american boat from the previous round. The ones that Alinghi bought to go on the hull they got from the kiwis.
That's an enormous wake. It's shoving so much water down with its lift
Making my own hydrofoils is never something I'd have thought about or bothered to mess with,
but then I look at you and dang, I'm suddenly really glad you're living your life
Awesome, rock on
No No,
For roll add windows servos 5~10kg servo (or linear motor for torque) and a gryo at the center of the board, calibrate it and let the roll be automatic. This will be fun to ride.
I love this project. Id make a kayak like thing instead of a surfboard
It's the double boom design preventing weight shift steering, a single boom on the center line would more closely mirror a traditional wake board. With a few simple edits and a montage throw in we could be watching it in a couple of weeks.
A Scientist, having fun, sharing and educating. I can't think of a better life combination. Well done.
7:48 how did your radiomaster pocket not get killed by the water??
Love your work!!
Horizontal stabilizer and maybe tractor props would make a smooth slow cruising hydrofoil,maybe even one that could be pedaled like a fishing Kayak
In boat design we call it "wetted surface"
Program a switch in your transmitter to reverse your throttle. Then you have full throttle fidelity but still have reverse on a switch when you need it.
Yep. That's what I did with my proportionally steered RC boat. Neutral to full forward is available in forward mode, to prevent accidental reversing of the motors at speed.
Flick the reverse switch and it goes about half forward through to half reverse. That allows for spinning on the spot, but reduced speeds prevent silly accidents trying to go backwards.
I probably should just stick the flight controller in that I was always meaning to put in there and let that handle it instead of the confusing mix I had to create on the rather limited FlySky transmitter I use.
Add a tail with vertical stabilizer for pitch stability!
IDEA: An negative AoA v-tail attached to the board at the back so that the total in-water span of the tail varies with board height and angle. More nose up = more lift in the back, higher board = less 'downforce' in the back, both resuling in a nose-down moment. May also add some roll stability.
So two choices, add more sweepback to dampen the pitch sensitivity, or as you said, go for a tail.
If a tail, I would look at creating a tetrahedron of struts (left wing, right wing, tailboom), and mount a plastic outdoor chair at the apex with sufficient floatation for when stationary (You could always do this as a canard as well).
Then I would look into how to have active controls (ball joint gimballed cruciform tail?) and 'fly' it from a sidestick.
Just imagine the site of some dude sitting on a garden chair as it flies across the water, seemingly with no visible means of support... (ooh, clear acrylic legs 0_0 )
the vibrations will be from turbulence induced vibrations from the vertical legs I am guessing. add some X struts across the length that very across length so the res freq is different across the entire strut.
try to create a wide narrow, venturi effect, on the wing in front of the propellers, so that a more concentrated water current arrives and avoids them going into cavitation, to avoid the formation of bubbles the internal surface of the tube could be channeled or have an upper redan that lets the bubbles come out before the propellers
Vanguard tier bonuses look incredible! Alemio is rewarding its loyal presale participants and early adopters well!
Dude, awsome improvements over the years with the foil projects. so glad to see it. After this handlebar idea, I had a vision of some kind of e-foil 'jetski' (better handelling and ergonomics) and maybe trying two foils, one in the front and one in the back. maybe it's too crazy on an idea, but would be interesting to see. Anyway, congrats for the work.
WOW! The wake that thing makes is almost surfable 🤣 Fascinating project though man!
I think adding dihedral and increasing sweep would negate the need for a horizontal stabilizer
It would work in theory but would be even more pitch sensitive. How about a canard in front?.
To increase the foil’s sensitivity to roll inputs the foil span should be curved. If you can imagine a flat foil would be the least sensitive and a perfect radius would be the most. So to get the desired roll sensitivity you find a balance between the two..
The shape a paraglider wing is a good start.
If you cut the wing, you could ride it faster due to less friction. If you add hinge to the wing, it can be folded upward when speed is needed.
I love it. I've gotten too old and rickety for a jet ski. I am sore for days after a few hours at the lake on that. I miss exploring the lake more intimately than the pontoon allows. A calm, sedate efoil would be great. Put an elevator and a seat on it and I'd buy one.
My opinion is you already have the optimum wing. Maybe add some dihedral ( with fence) to the wing ends, bidirectional steering with motors, then solve the pitch problem. Maybe a canard?
Having a V wing gives stability and sheds weeds. Also i like a sit down on low chair option. I am a cruiser not a speeder.
1 hour or more ride is just right for exploring fast and not using petrol.
How about two cable throttles for a pull pull ailerons
all these experiments are really fun plus using cheap materials.
all the commercial foils for wing foil, wind foil etc are crazy expensive. unless there is some big breakthrough in CF manufacturing cost, I think sport foil will remain CF like enthusiast bikes, but like ebikes, efoils. will focus on affordability and value. you could imagine a single battery /motors and different propellers/foils like small fast spinning propellers and small foil to do high speed/sharp turns for short periods or low rpm, large propeller and foil to cruise long distance with optional passenger.
I think the enabler for efoils will be advance in electronic and software.to make them stable and easy to control without stabilizers similar to how hoverboard/segways made easy and affordable to have e mobility with just two wheels an two motors
Efficient smooth and slow would be lovely for most personal transport options and recreation
If I had the opportunity to hang out with anyone in the world for one day I would pick you! You are the coolest dude!!
If I had even 1/10th the skills you have... 😱 I have a beefy off-road wheelchair, that's pretty much a mountain bike for paraplegics. My dream is to make it electric, dual motor, wheelie capable, and also RC capable for if I need to fetch it. 🤠
A guy in my town has a 3 wheel electric wheelchair. It's got 20" BMX style wheels and disc brakes. I've seen him keeping up with traffic through the school zone near his house... So around 40km/h. I suspect it gets a bit more than that when there's no cars holding him back.
Technically it's illegal where we live, but imagine being the cop who fines him for using his wheelchair too fast 😂
@tin2001 That sounds awesome!
"It's nice that the prop breaches the surface because then you know you're getting too high... "
That's what the pilots at Aeroflot used to say on the flight back from Cuba.
If you're standing and using handlebars, you really can use anything instead of a board. It would look really cool if you were standing in a semi-sphere, which would maybe allow you to stay dry when stationary (like a micro-boat). The wing would probably need to be neutral (not floating)
You should build a gyro controlled weight shift system to control pitch and/or roll.You could throw a core x/y 3d printer on the board under your seat and throw a bunch of lead on the printhead and you would have a good start.