This is my first official post on this forum and I have to say that this community is great. I am really excited to be working on my first efoil project. After hesitating quite a bit due to budget restrictions, I ended saying what the hell and going for it.
To give you a little bit of background about me, I am 21 years old currently studying at Florida International University (why the budget concerns) and I am also a sprint kayak athlete. I’m originally from Quebec, Canada so I speak French as well and I had no prior knowledge or experience with building RC stuff etc. So, this is all somewhat new to me and I will need some input from the community.
Now let’s dig into what I have in mind for this build. So, I bought a brand new Cabrinha VMG carbon race board from a local seller on Ebay. It came with straps, and fins and everything was brand new. I paid 220$ for it which I thought was an awesome deal considering that I’m currently trying to sell the straps and fins and hope to get somewhere around 100$ back from that. I also bought a demo liquid force rocket foil from kite paddle surf which is in great condition for 320$ with shipping. Pro tip: If you are on a budget, I recommend to do extensive online research. There are a lot of great opportunities out there. Furthermore, you should contact big online sellers by email and ask them about their used inventory. Sites like ikitesurf.com , kitepaddlesurf.com, realwatersports.com, mackiteboarding.com and forcekiteandwake.com are all good shopping sources.
Now onto more specific efoil components, I almost got carried away there. So, I’m planning on doing a direct drive direct cooling set up. The 80100 APS 80kv and 130kv are both in my cart, but I can’t decide which one (Help me out if you can). I will waterproof the motor using mat’s technique outlined in this google doc I made from his instructions. The mast clamp files were also provided by Mat as he designed it for his build. I will be printing it in ASA on a MakerBot replicator 2x. The ESC will have a high amp capacity (300a-400a) since I do not plan on water-cooling it. If you have a spare ESC or a slightly used one you don’t use and that has between 300a and 400a capacity, let me know as I might be interested in buying it from you.
As for the battery pack, I figured I would keep it simple and buy lipo batteries. I am currently looking at either 2x6s 22ah lipo batteries in series or 4x6s 16ah lipo batteries (2 in series and 2 in parallel). However, I am also interested in building my own 18650 battery pack. I do not have any prior experience spot welding and building battery pack so I am a little bit hesitant about going through with it. Let me know if you have a simple way of building a battery pack.
I will mount the foil on a high density track box that will be layered in my board. If you guys know a cheaper and more reliable way of installing a foil mount underneath a race board please let me know. I’m also planning on making a custom waterproof compartment into my board that will hold the batteries, the esc etc. As per the remote, I was planning on waterproofing the electronics inside using clear nail polish and CorrosionX.
The only thing I bought so far is the board and the foil, therefore I am encouraging you to leave your ideas in the comment as I am looking to get more inputs on my build. If you have any questions, do not hesitate to comment and I will get back to you.