I was recently laying out my battery/electronics box and looking for inspiration via pics of other boxes on this forum. That resulted in the following list of links which others might find helpful when laying out their own box. Simply click one of the blue links below and then scroll down until you see the photo(s) of each.
And if I missed your box please add it!
Damn I somehow missed that post
After almost one year tinkering on my Efoil I finally have no break downs for the last 10h of ride… This is why I thought it’s time for sharing my -until now- working setup and thoughts.
My idea is to have a propulsion unit were all axial sealing get compressed to aluminum surfaces. Everything is assembled together by long screws in solid aluminum threads. At the beginning I had a lot of 3d printed parts which I gradually changed to aluminum because of water leaks.
Now I’m quite satisfied with…
Dear builders
We would like to contribute to this awesome new sport and DIY projects! We are three brothers from Norway, one eye-doctor and two mechanical engineers, we also get help from some of our very talented friends that are into electronics and programming.
We decided to make a thread where we will show different aspects of our build and how we solved challenges we came across (Cooling ESC, Gearbox, Waterproofing, Mast mount, Duct, Controller, propellers etc). Hopefully both you and we …
Hi!
I noe have a ner setup. The esc has been equipped with four 690uf caps instead of the original three 390uf.
I also made a new prop that has a diameter that is 20mm smaller than the original.
I made a test run and the caps reached 65C after 12 minutes. The smaller prop works fine to.
I used a flir camera to look at the esc after the run, a very nice tool to track heat.
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[image] [image]
Hi Tim, my mast center is 48cm from the back tip of the KRace70. Here some more pics with measurements for battery and esc box. Measured from back. [image] [image] [image] a
I want to share some feedback with my tests with lipo battery :
First test with 2 multistar 4S 20A, serial configuration, ESC 180A hobbywing
[RM8926-1-e4df-6sez]
[DSC03114]
Ride time : 20 minutes max
Amp during session : 60A (Foil out of the water)
the voltage decrease very quickly (after 1 minute) and it’s more difficult to out of the water when you touch.
Temp after 20 minutes : 60°C ( ESC into the box, watercooling close loop)
Temp after 20 minutes : 40°C ( ESC out of the box)
2…
The second survived so far. The prop is the cheapest you can get, no name, 180mm diameter, i cut it down to around 160 on a lathe. The other parts are milled, 3D printing could also work. The first motor was hydrodynamical opimized, that was a failure.
[Stator Kupferpigment 1]
Keep the epoxy coating thin. The seconds motor had more space between the windings, so cooling is much more effective. I run it in the mediterrainian sea, very salty.
[EpoxyTreatment]
The incomplete insulation at the …
The battery box, has 4 nylon 1/4-20, 3/4" long bolts passing through it. I have automobile gasket sealer on the heads of those nylon bolts. Those nylon bolts screw in to steel 1/4"-20 coupling nuts on the out side of the box. The coupling nuts recess in to the urethane foam surfboard. Then I screwed steel all-thread into the coupling nuts with big washers and nuts. Its a little ugly but it has never given me any problems. [IMG_20180624_223147766]
Finally yesterday was first test in water…
It’s still in a testing phase…
so i’m using a board i made for surf foil, the electronic is in a case, and the wires are running outside the mast… and duct-taped to the board.
the idea was to see if i could get away without water-cooling of the ESC… the ESC held up well, but got to 70+ degree celsius… so ill add the water-cooling in next version.
i still need to perfect the balance of the whole thing… flight is very unstable and the nose is point…
after a few weeks in the dust, new board is coming along…
all hotwired from a block of polystyrene, Plywood stich&glued for the electronic bays that extend inside toward the back and the foil screws to it. each bay is watertight from the next.
Old mast had some issues… new one is perfect, quite thin and plenty of space for the wire… but new motor holder needed.
The Plexiglas windows will have some round hatch for easier access.
it’s all filmed for a movie coming… after first flight!
[IMG_4…
Time to get that setup on 12S and see what speed you can get
Hi all,
firstly I’d like to thank Pacific meister for setting up this community and secondly Silvio on which my set-up is based.
My build is not yet finished yet, just want to share and i’m open for suggestions https://hobbyking.com/nl_nl/turnigy-aquastar-4084-620kv-water-cooled-brushless-motor.html -> i will r…
working on the box, i will try passive cooling with a heat sink outside, silicone up everything and will go like that for the first test…
[IMG_5561]
[IMG_5562]
Feedback after 50/60 hours of ride [P1050646]
[P1050674]
No issue on motor, gearbox (sss 500kv, neugart 5:1)
I have 2 lipsseal after the gearbox => no leak but the shaft after the last lipseal is a little corroded (bad shaft)
I changed my ESC by a flier 400A because the seaking was too hot without watercooling
[Capture]
I installed another copper/alu cooling on the back of this ESC (very nice 40/50°c inside the box, without water cooling)
[P1050696]
I improved the …
I started adding the electrics. The batteries will be at the very front of the board. This uses the space most efficiently. I want to be able to access all the components without having to remove anything.
I added an acrylic wall to separate the batteries from the receiver, UBEC, Arduino and mini Relais. Acrylic so I have enough light. Polycarbonate would be nice, but I don’t have any. This is not to keep things waterproof, but rather to protect the batteries and to keep everything in place. I…
can you give me the name of your glue because I do not find your last video on the electric box, thank you
It seems I can’t edit the original post so I will add some updates here. I am getting rather close now! I have my board and all the electronics. I just need to drill a hole for the wiring and put in mounts for the electronics enclosure. The electronics will be pretty quick as they are mostly just plug and play. Here are some pics:
[20180509_082946]
[20180509_082952]
[20180509_083009]
This is a hobbyking yep 120A ESC with a modded heatsink. I’m hoping it will hold up! It only set me back £…
After almost one year tinkering on my Efoil I finally have no break downs for the last 10h of ride… This is why I thought it’s time for sharing my -until now- working setup and thoughts.
My idea is to have a propulsion unit were all axial sealing get compressed to aluminum surfaces. Everything is assembled together by long screws in solid aluminum threads. At the beginning I had a lot of 3d printed parts which I gradually changed to aluminum because of water leaks.
Now I’m quite satisfied with…
