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.
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.
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!
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.
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.
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.
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.
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.
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.
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.
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.
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 ;)
![#008-3: Building Battery Packs for eFoil [Pt.2: Build]](http://i.ytimg.com/vi/R1BiXBjgxn8/mqdefault.jpg)
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.
I found a suitable relay now.
Robert is studying your project with great interest.
You are a good man
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.
Check out the Max Maker build thread on efoil.builders.
There are several solid state options that can switch 200 amps very cheaply :). An IGBT will likely work for your application.
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!
Yeah, I read something about this afterwards and that kinda sucks. I probably won’t add it now.
Cool! Cant wait to see this :)
This is going to be awesome!
My worst fear is that I cannot ride it haha
200A relay should be quite cheep if you look for a car starter relay.
Thanks. I found one from an electric forklift.
Love the project, do you have a link to the motor you are utilizing?
Please provide motor link
Looking forward to this!
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
Best advice is to ask this question on efoil.builders
cool, any update on this?
Yes. I finished prop testing. There is a video about it.
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?
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.
Very interesting project, the end result should be really fun :)
Gotta wonder what motor you're going to get though..
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.
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 ;)
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.
In the video you talk about motors that are rumored to be perfect for this. Which ones are you talking about?
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.
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.
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.
@Max Maker Where did you get the waterproof box ?
Ebay
Hey, I am thinking of making one of these and am wondering where you got those specific batteries?
Hobbyking.com
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!
They will just shine through the hull into the water. I hope they still work after laminating them!
hi ich wohne auch in deutschland ich wollte fragen wo du die stahlbox her hast
BigEnderTroll Zockt Hi. Ebay
wo wohnst du so in deutschland (bundesland) ?
ach und danke für das schnelle feedback
Lübeck
ah cool ich wohne in der nähe von stuttgart
Awesome stuff! looking forward to the result! Might be difficult to glass all the details on the top side of the board?
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.
Can you add relays in parallel?
I don’t understand.
How much did this cost overall?
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.
Do you know of any cheaper options? I live on a lake and kind of want to make this myself.
I actually found a wing for about 79 USD
I don’t know a cheaper way. Its a pricey hobby.
Which one?
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 ;)
Oh yeah, getting hurt seems possible. I will wear a full wetsuit, upper body protection, gloves, shoes and helmet.
Yes i suppose a MOSFET could be cheaper than the relay.
Nen starter relaise von nem auto is das richtige für dich die teile gibt es auch außerhalb von nem anlasser
Hast du einen Link?
Max Maker ich mein klar ....ich hab dir in instagram ne Nachricht geschickt
iam very interesting to buy the motor and electronic parts
Awesome project man... !! the bag is not fireproof, but fire retardant
Thanks for watching! I store them outside either way.
@@MaxMakerChannel Cool! I just felt like i had to say :P But for real, congrats cause your videos are really nice
Thank you! I do my best.
Search for "contactor"
You might be a genius
Second!!!
BTW 10c is not enough
Hey, I've been watching for a while. Can I get a shoutout along with Italo?
I will think of something. If I don’t forget haha. Editing is stressful and there are a lot of parts to it.
Keep up the great work!!
*50cm = 1.5'
Nice !! First !!
Well done, I should mention you in my next video : )
Max Maker Thank you very much for the help !! ;)
Nothing about the motor.It must be a lonely motor