Easy Hydrofoil (DIY)

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DIY E-foil Board
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Peter Sripol
PMB328
3195 Dayton Xenia RD STE 900
Beavercreek, OH 45434
DISCLAIMER:
This video is purely for entertainment value, any and all replications of any experiments, projects, and creations or similar are the sole legal responsibility of the person(s) involved in replicating them. PSproject can not be liable for any information or misinformation, wrongful use, damage to personal property, death or any circumstances that result from replication of any projects seen.
Be safe and use your head people!

[@PeterSripol]

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[@carrotnonumbershere]

Thx for the sponsor warning 🙂

[@taham6757]

i have a question , is it true that flying wings are not stable like why dont we see it often in airplanes ?

[@therealanime]

Hate to break it to you but I have to turn off Opera GX's Ad Blocker in order to use KZbin so they really shouldn't advertise that.

[@cadetcallahan3766]

You know you had the right opportunity to have it be a video sponsored by surf shark and you did not do it

[@AlwaysAChance84]

Your amazon links don't work just to let you know.

[@dherrendoerfer]

Your build looks excellent, and I, as a foiler (wing/wind) salute your 3-day progress. Your setup has way too much surface on the front foil for your weight, and you should set up your propellers for a higher end-speed. In your first few tries you were stalling out the foil all the time, you need to get up to some speed, give the board one or two pumps using your weight to get the board out of the water and the foil to plane, Then you need to level out the board quickly - That's when you need the extra speed from the prop setup, 'cos all drag will be gone in an instant - the better you level out, and the higher the aspect of the foil the longer you can go on a battery. You'll get there ..

[@EmilsPRO]

Interesting

[@williamrgrant]

This makes a lot of sense. Thinking about flying an airplane... you do everything you can to stay well above stall speed. Everything goes to crap if you are hanging out right at stall speed, as the tiniest factor can cause a little extra drag and you drop out of the sky. I'm guessing it works the same way here? Which explains why his setup was so easy to get to crash out or suddenly get away from under him?

[@kanedewilde]

Hey Peter! I’m a long time fan since the flite test days and hydrofoil designer with a couple suggestions to get this working better! -reduce stabilizer angle. Most large beginner foils come with too much stabilizer angle/nose up trim. Nose up trim from the stabilizer is needed to counter the drag produced by the wings and the leverage of the strut or “mast”. Because you have a motor down there, that drag is offset and you can significantly reduce stabilizer angle. Try printing some stackable 1° and 0.5° shims or just use thin washers. -center of gravity. Just like a plane, a hydrofoil is also sensitive to center of gravity. Moving the battery above the front wing will help balance everything out. -Board. To move the battery forwards, you probably need to make a new board with a cutout for it. For learning and riding underpowered, longer and narrower boards work best. Something in the 5-6’ range and around 22-28” wide should work great for just cruising around. Your hull design looked good. -Strut or “mast”. Because of the additional battery weight, a stiffer mast will really help with control. Foils are a structural nightmare and flex is your biggest enemy. Axis foils makes a great aluminum mast that is both cheap and stiff. I also noticed some ventilation or trapped air on your mast. Instead of just printing trailing edge fairings, try printing fairings that wrap all the way around the mast. This way the surface will be far smoother. Alternatively, try to hide the wires inside the mast. -connection slop. Make sure all connections between components are super tight. I like to use cut up aluminum cans shoved in the connection between parts to stiffen everything up. For riding, speed is your friend. Try to keep the board skimming until you have enough speed to climb without stalling. Great job making this work! I’m super excited to see what you come up with next!

[@crackedemerald4930]

Real comment, nice to see. Commenting for engagement and cus you deserve it brother.

[@jwalster9412]

That's a lot of afew suggestions.

[@WarblesOnALot]

G'day, Great Constructive Criticism & Advice... Yay Team ! Keep on keepin' on... Stay safe. ;-p Ciao !

[@paulshapiro6119]

I happen to recognize kane dewilde is a world class foiler and foil designer. I suggest he really knows what he is recommending.

[@rctestflight]

So fun!!! Thanks for the new spirt of inspiration to get started on my paddle board sized hydrofoil

[@MrCarlozan96]

That will be so cool. Love your videos Daniel, always very creative, though out and beautifully edited. I never miss one.

[@sir_vix]

Damn, was about to post the comment: "Probably a stupid question... but could a craft combine hydrofoil and ground effect?" Did a quick google for due diligence, and immediately saw that you already went there. You're a G.Damn boss.

[@cinarsinan]

I would like to see both of you on a project

[@alfaqvcarlos4406]

Make one with ailerons and elevator with gyro so it can be easy to fly???

[@lemonyellow3117]

I’ve surfed for 40 years. Trying to foil for 2 years. Trying…The thing about you is your great attitude and ingenuity. Your video made my day. I’ll check in with you later and I bet you’ll be cruising. Stay happy!

[@samrowland2816]

I'd love to see you put control surfaces on the tiny underwater aeroplane, and see if you can control it with a transmitter, sat cross legged on the board, which is disguised as a flying carpet, dressed as Aladdin.

[@andrewalbright2]

Great idea

[@benmcreynolds8581]

I find hydrofoil boats fascinating! I'd love to see them make a comeback in the DIY community. That hydrofoil metal skif boat is amazing

[@sigmet61]

Wonder if an electronic gyro to control throttle to maintain angle of attack would work.

[@fabianrudzewski9027]

Question is, how you'd implement that. Both my e foils pitch up really strong when applying power and have changing angle of attack depending on speed (like an airplane). Also, at high AOA you get lots of drag and need lots of power to stay flying, so you constantly have to battle the nose pitching up to get out of that high AOA without taking a swim. Would be a challenge to get that riding nicely with just gyro for power control. Maybe in addition to controlling the motor, you could give it a little elevator for better pitch control.

[@amogusenjoyer]

​@@fabianrudzewski9027wouldn't a simple PID algo be a good start to maintain the pitch regardless of motor speed?

[@rickburnout666]

It would work, but the gyro would/might need a few modifications first?

[@EmotionalSupportCube]

I feel like a trim tab that could be easily and reliably changed between attempts would be not only easier to implement, but also probably more reliable all things considered.

[@socialshipwreck8744]

PID controllers are a nightmare

[@needmoreboost6369]

Underwater flight is an excellent phenomenon! Brings back memories! The first time I discovered this as a young kid was playing in the pool with a hard plastic model Cessna,it looked super realistic with an accurate aerofoil, one day I threw in in the water to notice it sink like a tail heavy plane so I jammed a few coins in the nose and set the cog underwater, it flew amazing well! so I made it rubber band powered with bendable control surfaces because of the drag it could fly underwater for over 3mins! Middle of summer I’d spend hours holding my breath, I’d imagine dramatic slow mo movie scenes as it flew around! I miss those simple times! These experiences give us hobbyists a distinct advantage in a complex world! If shtf at least I know the rc community will survive!

[@bradley3549]

It's a good day when you see a KZbin maker making a fin out of plywood instead of 3D printing something. People really don't seem to appreciate how strong wood and wood composites are compared to anything from an FDM printer.

[@TheBackyardScientist]

this is so cool! now all I need to do is learn how to surf and fly haha

[@syedhashir2970]

This man never disappoints. I didn't knew he could surf too 😂

[@pete3897]

Know way!

[@user-be2md6kr1h]

There were a couple of shots in there with Peter looking like an absolute Chad.

[@iamausome]

"It's not sunk cost fallacy if you don't give up" 100% belongs on a t-shirt

[@cedrichelsemans34]

Hi Peter! It’s cool to see you try hydrofoils. I follow you for a long time and i love your rc stuff. I’m more of a kitesurf hydrofoiler myself but these e-boards are awesome too! I would love to see you mess with different wing shapes and show us your idea’s of hydrofoils from an aeronautical engineering perfective. Because in the hydrofoil community I feel that there is a lot of room of new ideas that already exist in the aviation world. Thanks a lot for these video’s. Kind regards from Belgium!

[@davidmolin8944]

It’s always a great day when Peter uploads another goofy video

[@PitWChannel]

"I love airplanes!"

[@dallassingley9505]

Peter I've been watching your stuff for a while but I was so stoked when I saw you had tackled an e-foil! I've wanted to give one a go for years now but have always felt to intimidated on the motor/ electronic side of things. You've inspired me to give it a go!

[@jamesthomas4080]

Maybe the throttle can be modulated by a gyro similar to how a hoverboard balances. That could reduce the stalls or nose in by having the throttle try to keep it level. If done just right you could just about eliminate the hand held throttle.

[@Rebar77_real]

May as well add some elevator control at that point. Lots of room under the fairings for things.

[@randomletters12c]

I think you might want something like a vesc: kzbin.info/www/bejne/i5XEoWero9Rme5Y. They are doing torque based control which may be mappable to the propeller based throttling but that is outside my wheelhouse.

[@tylerebowers]

I have thought about making this for the longest time. The commercial boards are so expensive.

[@allanasp771]

Interesting stuff. After 40 plus years windsurfing I have the last two seasons done a lot of training/sailing trying to master windfoiling ( i.e foiling with a windsurfing sail as "motor") so I know ,first hand, how hard it is to control the flight so I'm impressed by your progress. Some tips and tricks; once you feel the foil lifting the board you must swiftly shift your weight forward. The lift of the board can also be adjusted by adjusting the angle of attack of the stabilizer (back wing).#2 make loooong turns since the foil does not like sharp turns especially not if the front wing is huge. Looking forward to see more of this since I totally agree with you about the crazy high pricing of complete e -foils. Greetings from Sweden.

[@user-el8op5ky1s]

Thanks for the inspiration! Ive been thinking dor a while of making a small electric outboard for my sailboat to combat the whole "Uh oh .. The winds stopped and im nowhere neer home" thing

[@OrganicOyster]

If you want to learn you can also rent those boards in some places, way cheaper than buying one, then you build one :)

[@Manxer]

I love projects like this, taking something so unobtainable to most and making it available to the savvy.

[@AhsanTechTrails]

broo I also want to make and test stuff like this, but my budget doesn't allow me to

[@piercelawless2654]

Don't we all

[@AhsanTechTrails]

i am deeply interested in programming robots stuff and I am learning AI to do that hope I will make some money from that to build things

[@jaredlynch8020]

What is learning AI ? You having deep drawn out conversations with Chat GPT?

[@AhsanTechTrails]

@@jaredlynch8020 i mean I am learning how to make chat gpt (for eaxample) and I am in University

[@FoilFanatic42]

Not sure if you've heard of foil drive but it is similar to this idea. It was cool to see your first experience foiling! DIY for this sport is part of what makes it so interesting.

[@fluiditynz]

I've passed to my local wingsurfing facebook group. Very cool to seeing another RC guy getting into foiling 😎

[@iamthesentinel584]

I work as a Hardware Testing Engineer, and we use those BoxCo boxes for nearly every enclosure. We love them.

[@trizumafk]

the most wholesome channel on here, love u peter and all your creations, u are such an inspiration and i love your videos

[@zaackanderson5042]

Bros bouta put the flying surf board company’s out of business 😭

[@tomallo99]

Oh yea, please make more of it! I would love a more refined version in the future (preferably with basic instrucions how to make one ourselves 😇). When I saw the price of these a couple years ago I had exactly the same thought, they are waaay to expensive for what you get, at least a couple times lol. Actually even wanted suggesting you to try to make one but ultimately forgot. Can't wait!

[@pvsoutherland]

Nice Work Peter! As an avid E-foiler, I will say that you would not believe the controversy and strong feelings that run in this group around these fantastic machines. I got involved early with a Kickstart campaign for the Waydoo brand which has made inroads into this sport and has significantly undercut the pricing of the big boys. I am with you on the absurdity surrounding the costs - these are not super complicated toys. The foils have been out there and are well understood as well as motors, batteries and ESCs as you well know with your RC work. Keep at it - its so much fun and gets only better as you progress.

[@aninventor69]

.

[@simony5807]

this is awesome! You look sick on the foil, thanks for reassuring us that it is REALLY difficult because I thought about buying one for half a second because it looks sick!

[@kallepetter]

Great video! I built a tow boogie instead. It felt simpler when you separate the electronics from the foilboard onto its own board. So I am getting towed by that on a standard foilboard.

[@TwZlr.]

I would recommend that you mount a waist high vertical bar. Mount it directly above the vertical foil. It would make it easier to control. Use the bar instead of just your feet to control also giving you something to help you stand on the board.

[@billybowbob2071]

Its amazing how with electric propulsion in water applications, that a shallow pitch prop can actually push you faster than a heavy pitch due to the resistance of the water causing the motor to spin slower while drawing way more current!

[@Robert-ni6ut]

Peter your videos never old and your the king of DIY keep up the great work 👍😁

[@MarcEgli]

Did not expect you to start foiling. Welcome to the sport!

[@SPotter1973]

Peter Stripol not breaking the bank, but the curve BLASTED!

[@kieren7763]

Im not looking to foil board but that motor setup you made looks perfect for my kayak 😂

[@NicholasRehm]

wait the purple paper towel water indicator is actually genius

[@Deja117]

Some large ships use stabilizers kind of like the wings on hydrofoils to prevent roll. It might be worth a look. Just be careful if you do, they sharp.

[@TioDave]

Air Chairs were big back in the early days of wakeboarding. I've seen some pretty crazy maneuvers on those things.

[@0dbm]

A little more detail on how you turned the electric skateboard wheel and speed controller into the propulsion system, Brilliant,

[@Chunkiie_Customz]

I just finished my boat motor builds. Thank you!!!

[@merijn1086]

Cool vid! I'm not sure you can get away with 3d printing the wing without fribre glass. Think of it as a plane wing that has to support your weight (not actually but similair). If you want to go high-end en ultra light you could consider carbon fiber with a 3d printed mold. Easy composites has some easy to watch tutorial videos. Would be cool to see

[@pauljs75]

Dunno why, but it seems like the thrust line and fine tuning trim would be the things to work on outside of one's own skill in trying to ride the thing. I'd think both of those could affect how sensitive it rides once getting it to plane.

[@cliftonmassey3143]

It will be cool to see other designs of foils.

[@Onerouss]

OMG, I laughed way too hard at the "Tour of San Francisco" remark/picture combo...

[@BrentLeVasseur]

I really have to commend you on your design! It’s brilliant! You are a talented engineer.

[@jonesmatthew7511]

I was thinking a lot about doing this, thank you for this video!

[@Forexalertsystem]

I'm from Miami, Florida. You are brave to be in that water with so many sharks in our waters, especially with the water being cloudy. It's probably the only reason you didn't notice how close you were to losing some limbs.

[@pithlyx9576]

more than anything ... the one thing that impresses me is peters consistency, and nothing will ever match seeing him in the ocean ... in cargo shorts.

[@boogiehasfun]

i am loving all of the ocean related content as i really like the ocean!

[@nolt4024]

I’ve always wondered if a wheel that you spin to control the throttle would work better on these than a trigger in order to provide a more constant/“diluted” response to throttle inputs that would tend to be more erratic with a trigger vs a rolling wheel as it seems that the biggest part of mastering the ride is a combo of throttle feathering vs balance for the most part.

[@laynemcarthur1374]

I would love to see a pro try one of these boards. Someone like austinkeen is sponsored and makes some amazing content as well.

[@waytooslow]

makes me want to try making my own DIY propulsion unit for fishing kayaks!

[@rolandgdean]

9:58 This montage, including the music, could be dropped in almost ANY 80's movie set in Florida or California.

[@hicknopunk]

You need to add rocket motors to give increased fun factor. Probably should add go faster stripes too. Drinking alcohol before trying to surf will help as well. Glad I could help.

[@VinydFPV]

That's crazy I was just watching your vid on the rc tugboat when the notification of this vid came through.... Spooky!!!👻🤣👍

[@engina1572]

this is awesome thanks again for all your ideas and excellent videos !! i have been trying to make my own airchair but i feel like this could be more fun !!

[@mayormaynothavedoneathingo1540]

Accidentally clicked on the notification for this video while trying to Fullscreen another video. I think I'll stay watching this one

[@chuckjoga1161]

The box is preventing you from moving your back foot over the mast for more pitch control.

[@matthewstephenbrown]

I love the dumpster fire as the background to "I got to tour around San Francisco". Spot on.

[@gaspererjavec7108]

Cant wait for you to do most of the research so the community can build variations that you inspired. The next David Windestal :D

[@BadNews255]

You never cease to amaze me with your ideas👍👍💯💯

[@Potato_Pizzer]

Always blowing me away with these incredible inventions. Keep up the good work!

[@Srfingfreak]

Yes, simply all of those things. I consider myself a handy person, but this is quite impressive in breadth and quality. You might like silicone caulk for potting material, btw, instead of candle wax.

[@ironhorsethrottlemaster5202]

Peter sripol the man that can make anything fly people

[@travismorgan4249]

You should make a powered paddle board. I’ve seen a few of those and they seem like a lot easier to stand up on.

[@brianb69692003]

Peter.. start at Step#1.... Body Surfing! Then go to Longboard to catch some waves, and Get the Feel/Balance. Then go to Regular boards.. Then you will Rock the Heck out of Your Hydrofoil!!

[@levigabel3685]

awsome! i love your videos and i think i have seen enough of them to be in the class of "Sripol people"

[@eduardostapenko6808]

2:55 not interested in Opera... but, god damn, the best add i watched (2 times)

[@Johnny-rj9on]

Yesterday, I was randomly thinking about attaching one of these e-foils to a dirigible

[@harambeexpress]

I didn't realise you could just take a big standard BLDC motor and run it under water. I thought it had to be fully sealed. I came across the motor that is used in that kit when I was researching how to build a DPV for diving.

[@TheLololololololollo]

You can definitely look into 3d printing a dc motor. I watched a video of a new motor design and you can probably implement both and have a good time with that

[@BloodyMobile]

While it might not be the most feasible idea, but maybe try to stuff the battery packs into the "fin"? It'd obviously need to be a little wider for that, but considering how thin it is, it might not have much effect on the drag. But the different mass distribution could have a noticeable effect on the stability? Maybe?... Just throwing thoughts at the wall here tbh.

[@RodrigoSantos-ve7op]

Very nice project! you should try to move forward the hydrofoil , just a litle bit. try some skateboarding to help you out too. also the hydrofoil wing size and shape is going to make easier or harder it depends in what you choose.

[@osmmanipadmehum]

You can try feeding the electricity from a power source on the other boat and deliver by cable to determine exactly what you need power wise.

[@Phoenixsims.02]

It would have been so good to have a surf shark ad

[@impuls60]

I wonder if you could make the board more friendly to beginners if you angle to motor upwards a few degrees since it looks like the tip of you're board always moves up so it stalls. Like on rc sailplanes with tilted lift motor.

[@stcredzero]

Idea: Make a rig with four motors on two motors on the ends of two staggered wings. Then control them with Ardupilot and some gyros and see if it can automatically balance the person.

[@davidcohen7992]

If you ever come to hood river I'd love to teach you how to wing foil. I think if you put a little more weight on the tail when you introduce roll you'd have more success in your turns, kinda like you would turn an airplane

[@johnthomas1422]

I like how you have no idea how to do this sport, so you are learning by building your own. It's like building your own guitar in order to learn to play guitar. I dig it.

[@Briaaanz]

I wonder if your experience with this makes it easier to transition to regular surfing

[@Fpvfreaky]

Since I see these a few years ago I’ve wanted to build one. Good job. Keep trying dude.i just know you will get it right. I built an electric mountain board. It does 40 + mph pulls wheelies so much fun. This is just what I like but on water. 👌🏼😉

[@georgemiller2129]

As a complete newb, I want to ask, can you angle the foils/wings for stability like you can on small planes?

[@benxrocket1615]

Hey man love what you doing that's freaking awesome I couldn't afford to buy one of those myself way too expensive love that you're trying to make it yourself cheap

[@ukulelefatman]

How about adding control surfaces and a flight control board? Smooth sailing😁

[@erbartlett]

Super fun video! It took me two years to learn to kite foil :) I've got some videos around slingshot foils, let me know if you need any help figuring out wing size / mast positioning / board volume, as it can take some playing with it to get those all working like they should

[@xXxcastenada]

your center of gravity is where the foil connects to the board, youre standing far forward of cg which is why its unstable and difficult to ride

[@redreefbud]

This is awesome man 😁 i am a diy type of guy myself. I am buying a board from another guy in my town. 4'10" nice hd board. $150. No wing. Made for kite foiling. I have 14s batteries (100a + output) for my scooters and electric skateboards 😁 i have vesc and a waterproof remote already. And 6374 motors. I think i just need to figure out wings and mounting. Just getting started. Still researching. Will be getting board later this week. Was looking at some stuff on float web site. Yeah, prices are outrageous 🤯 i have done some epoxy work and have some nice cf/fiberglass sheeting 😁 i can do this. I also have 3d printer and am good with wood working if needed. Great video man!! I will look at your other stuff 😁 thanks for sharing. I am on same mission 🤯 in Buffalo NY though. Will be something to do over winter 😉

[@youdigsurf]

As a wingfoiler surf foiler, best advice i can give you have too much weight on the back of the board, some have found a way to put the batterie on a backpacl, it's the best way to have the better balance, other brand like takuma integrated the pripeller motor inside the fuselage of the foil. Good luck i will wait for the part 2

[@RahLoh]

could you use rc airplane smart autolevel feature to keep the board level as you throttle up? supercool! show the big techs now its done

[@ToesOfRice]

can’t wait for the next boat video!!

[@koala_the_]

seems cool keep the good work up

[@AviationNNO]

Great project! thanks for sharing all the details. on first glance, the Motor shaft for the linked Motor on amazon is only 10mm while the motor shaft on the Onshape files is 100mm plus some other missing details... Is there an updated and more complete design link for the version that was actually built, or is the shared Onshape design is just a suggested starting point that requires additional work and modification before attempting printing and building the drive unit ?

[@EamonOLeary]

You inspired me to build my first cardboard rc plane

[@gamingpro5954]

i cant wait for the next vid of this, GOOOOO FULLL DIY

[@walk4718]

Dude, great content; worth the wait 👍

[@alfiegoldsworthy7132]

Ive always wondered whether you could make the hydrofoil larger to allow you to "fly" at a slower speed

[@FoilFanatic42]

You can! But its better to go with a higher aspect ratio for the lower take off and cruise speed.

[@alfiegoldsworthy7132]

​@@FoilFanatic42cheers for the clarification, have a good day