Electric Hydrofoil Surfboard Introduction (Plans, Parts and Electrics)

[@bogdanidzik6109]

Robert is studying your project with great interest.

[@faredelhawy8837]

You are a good man

[@pocket83]

That is crazy cool! First time seeing one of those. I can think of all sorts of fun ways to get hurt with that! Good luck with it. Interesting stuff ;)

[@MaxMakerChannel]

Oh yeah, getting hurt seems possible. I will wear a full wetsuit, upper body protection, gloves, shoes and helmet.

[@parkerd2154]

There are several solid state options that can switch 200 amps very cheaply :). An IGBT will likely work for your application.

[@glenngregory]

Great video Max. FYI the current meter requires a large shunt which the current flows, not sure if you have this as I didn't see it in the video. Looking forward to seeing more on the board!

[@MaxMakerChannel]

Yeah, I read something about this afterwards and that kinda sucks. I probably won’t add it now.

[@PhysicsAnonymous]

Damn Max, you're really going for it! That's awesome. I can't wait to see how it turns out. Your ESC will have some sort of cut off switch you can use as an e-stop. I know it wont be as* safe, as it will still be feeding power up to that point. but at least it will stop the motor from running away on you. Also you might want to consider putting a stringer down the center of the board, it will add a surprising amount of structure and rigidity to the board. If you get tired of waiting for the specialty motor, I might have some suggestions for some off the shelf motors you could modify.

[@MaxMakerChannel]

Thanks. I pretty much god the motor now. There are two made by alien power systems. One is waterproof and the other one is easy to waterproof at home with epoxy. I also found a 200A relay for electric forklifts on ebay. Made in the UK and great quality.

[@felixdietzCGN]

Cool! Cant wait to see this :)

[@Robonza]

Your dead man switch could simply disable the motor controller, It couldn't be too hard to work out. e,g, make it drop the logic supply on the esc. For a kill switch you can short out the supply which would force the fuse to blow.

[@MaxMakerChannel]

I found a suitable relay now.

[@wileecoyoti]

This is going to be awesome!

[@MaxMakerChannel]

My worst fear is that I cannot ride it haha

[@JeremyCook]

I'm wondering how you're going to use those LED strips - I bet they will look awesome. Nice to get another look at it!

[@MaxMakerChannel]

They will just shine through the hull into the water. I hope they still work after laminating them!

[@MaltandMake]

Looking forward to this!

[@IrishSkruffles]

Very interesting project, the end result should be really fun :) Gotta wonder what motor you're going to get though..

[@MaxMakerChannel]

I am looking for a 100kV inrunner motor that runs at 44V and with about 5000Watts. The diameter should be less than 70mm. Motors that are available currently are unsuitable because they are either out-runners, so not waterproof-able or they run too fast with low torque. They are made for RC planes. Air is thin, water is thick. So we need a lot of torque and low speed. Props have cavitation at high speeds.

[@IrishSkruffles]

Max Maker I thought it'd have to be powerful alright but wow.. A 5kW motor! Good thing you have the sea to cool it ;)

[@MaxMakerChannel]

Oh yeah. The sea makes this much easier, and that the motor is underwater. I just hope the ESC does not blow up, that is most expensive, and I had one blow up on me before. Its like new years eve fireworks.

[@EduardKieser]

In the video you talk about motors that are rumored to be perfect for this. Which ones are you talking about?

[@MaxMakerChannel]

APS 70110 and APS 56115. However, the first one only has 3000W, and the second one needs 110V DC, which is to dangerous for my taste. So I use the 70110 for now. At least I am testing it and see if it could work. Once I know the thrust, Ill build the motor pod.

[@DeerNiko]

Awesome stuff! looking forward to the result! Might be difficult to glass all the details on the top side of the board?

[@MaxMakerChannel]

It was haha. There were a ton of patches and overlaps. The glassing was alright, but then there was a lot of sanding and filling. I am glad that everything will be painted over.

[@bitcoinnoderunner]

You might be a genius

200A relay should be quite cheep if you look for a car starter relay.

[@MaxMakerChannel]

Thanks. I found one from an electric forklift.

[@donward6897]

Love the project, do you have a link to the motor you are utilizing?

[@CSJiGSaW08]

Please provide motor link

[@benjaminkoller803]

Hi Max! It seems like you didn't finish the board jet. What issues do you have had with you motor/ESC? Will you finish it?

[@MaxMakerChannel]

I will finish it! The only issue is time at the moment. I have to work a lot and don’t have as much free time to work on youtube. I hope this will change. I am about to finish water proofing and then testing the prop.

[@pquispea]

what is your battery configuration for this efoil, how do you connect them, what is your total Volt and A-h? Sorry I dont speak english very well and I miss some words on minute 2:00.

[@MaxMakerChannel]

Check out the Max Maker build thread on efoil.builders.

[@icsfreedom2007]

Brilliant job body Do you think the PRO MARINE 300 AMP ESC will be a good ESC without issues? I would like to order it if you recommend it Thank you

[@MaxMakerChannel]

Best advice is to ask this question on efoil.builders

[@V1P3RSlab]

Yes i suppose a MOSFET could be cheaper than the relay.

[@spencer3823]

Hey, I am thinking of making one of these and am wondering where you got those specific batteries?

[@MaxMakerChannel]

Hobbyking.com

[@trwsurfingco.3488]

iam very interesting to buy the motor and electronic parts

[@jakecalvello8207]

How much did this cost overall?

[@MaxMakerChannel]

So far 200€ for the batteries, 30€ for foam, 50€ for the case, 20€ for the aluminium box, 200€ for all the electric stuff, 100€ for glassfibre and epoxy, 500€ for the wing. 1100€ total. I guess another 600€ for the motor and the ESC. Not cheap.

[@jakecalvello8207]

Do you know of any cheaper options? I live on a lake and kind of want to make this myself.

[@jakecalvello8207]

I actually found a wing for about 79 USD

[@MaxMakerChannel]

I don’t know a cheaper way. Its a pricey hobby.

[@MaxMakerChannel]

Which one?

[@ravex1151]

@Max Maker Where did you get the waterproof box ?

[@MaxMakerChannel]

Ebay

[@qwaqwa1960]

Search for "contactor"

[@smyleslaughter]

cool, any update on this?

[@MaxMakerChannel]

Yes. I finished prop testing. There is a video about it.

[@bigendertroll]

hi ich wohne auch in deutschland ich wollte fragen wo du die stahlbox her hast

[@MaxMakerChannel]

BigEnderTroll Zockt Hi. Ebay

[@bigendertroll]

wo wohnst du so in deutschland (bundesland) ?

[@bigendertroll]

ach und danke für das schnelle feedback

[@MaxMakerChannel]

Lübeck

[@bigendertroll]

ah cool ich wohne in der nähe von stuttgart

[@azimalif266]

Can you add relays in parallel?

[@MaxMakerChannel]

I don’t understand.

[@thecrazykartbyAJ]

Awesome project man... !! the bag is not fireproof, but fire retardant

[@MaxMakerChannel]

Thanks for watching! I store them outside either way.

[@thecrazykartbyAJ]

@@MaxMakerChannel Cool! I just felt like i had to say :P But for real, congrats cause your videos are really nice

[@MaxMakerChannel]

Thank you! I do my best.

[@chriskue3285]

Nen starter relaise von nem auto is das richtige für dich die teile gibt es auch außerhalb von nem anlasser

[@MaxMakerChannel]

Hast du einen Link?

[@chriskue3285]

Max Maker ich mein klar ....ich hab dir in instagram ne Nachricht geschickt

[@jakecalvello8207]

Second!!!

[@jakecalvello8207]

Hey, I've been watching for a while. Can I get a shoutout along with Italo?

[@MaxMakerChannel]

I will think of something. If I don’t forget haha. Editing is stressful and there are a lot of parts to it.

[@jakecalvello8207]

Keep up the great work!!

[@Ender_Wiggin]

BTW 10c is not enough

[@ItaloLima]

Nice !! First !!

[@MaxMakerChannel]

Well done, I should mention you in my next video : )

[@ItaloLima]

Max Maker Thank you very much for the help !! ;)

[@GM-dc8vr]

*50cm = 1.5'

[@fookutube501]

Nothing about the motor.It must be a lonely motor