Unfortunately the short Gong board is hungry for energy at starting, and since ram pressure is relatively low at start, the old MGM 14063-3 didn’t get enough cooling and has been overheating quickly.
I was drawing 170A at start with controller temperature at 110°C and was facing thermal shutdown of controller.
The bigger 250A ESC should handle high currents much better, so no more thermal shutdown.
But i’m wondering how many amps the FR motor can handle. I was thinking to limit current so the motor won’t burn.
Nice work, the AIREX cover would have been lighter than the wood! Can you tell me what the seal of the trap door is made of ? MOLD30 ? How did you go about casting the gasket?
I’ve applied @michion method of a temporary window seal as a barrier and then poured the silicone in place and closed the lid. I’ve done the same for the mast plate seal.
This worked out for me perfectly, not even a drop of water in the cavity!
Long time no posts. But I have been productive in the mean time. Here comes some pictures of a 14S13P Molicel P42a. That’s the maximum I could fit into my battery box…
The battery has a whopping 17,3kg total weight. But it’s been built for long distance exploring trips along coastlines or rivers.
Inspired by the flitecell nano I’ve also just built a 14S5P with the same Molicel P42a. I’m still about to find out how much ride time this small battery will give me. But I’m looking forward for the reduced weight while carving!
I’ve been riding the Veloce XLT, it’s very similar to RL Foil 1600 and the Fluid L is a very nice playful wing that I’m mostly riding at the moment. It’s a fast wing and requires speed to get stable.
The producer is BOPLA, my normal box is called P339 360x360x90mm.
The Nano is the P334, 360x160x90mm.
These boxes are premium quality and I really like the fact that I can inspect them whenever I want with 4 screws. They have a foam seal which is completely waterproof.
Hallo Tobias,
Du hast für einige Dinge wirklich super Lösungen gefunden (z.B. die Batterieboxen und Nickelsicherungen für 18650). Auch sehr gute und kompetente Arbeiten.
Wenn ich dieses Jahr mal Berlin zum foilen erkunde oder du die Müritz besuchst können wir uns gerne mal treffen.
Grüße von der Müritz, Lothar
Thanks mate! These are the latches i bought, they feel high quality and so far they’re waterproof.
The hinges on V4 aren’t the friction hinges I used on the other boards, they are these ones:
The cable glands are actually not stainless steel, but covered with nickel. I was looking for stainless steel ones, but harder to find.
Watch out for different sizes, 4-8mm PG9 fit for 8AWG best.
I got them on Amazon:
Finally have been able to try out the new lighter nano battery. And the swing weight difference is just incredible, the board is so much more fun!
I’ve also found a new way to start small boards quite easily by turning narrow circles. Like this I can start the board in very little time and battery consumption. Check it out in the video!
The winter in Berlin is giving us some nice sunny days, and as long the river isn’t frozen I’m out on the water in a drysuit with a heated vest underneath. So I can easily stay 90 mins in 3-5 °C water and air temperatures.
They didn’t push the activity forward as they announced they would but I think Supernova tried a circular takeoff method in 2020. Not sure they succeeded though…
There latchds ar eo expensive, almost 90$ for 1. For this money you could get Gem latche, but I am not from US. They dont have any resellers in Europe.
But thanks for glams, I thought they were much more expensive.
Do you have any pictures, how you reinforced the foil part, where where mast plate connects to board. And how did you seal the cables in order for them to be removable.
You can find this information in the original post!
“Because this board was thick enough i didn’t have to mill until the bottom laminate and was able to use the track box and leave the FCS handle.
To support the track box i laminated a sandwich of 2 CF sheets of 1mm each over the bottom of the board.”
Hey Tobi,
Have you testet your small battery already? Im curious on what ride times you can achieve.
Maybe it is beneficial to go with two smaller batteries instead of a single larger one. That way you could have the options for a lightweight setup or you could wire them in parallel to mimic a larger battery
Charging time would be reduced as well, however you would need double the amount of expensive connectors, BMS, battery box etc.
Would like to hear your opinion
The use case is specific for short rides or lighter people. I’ve achieved a total ride time of 35 mins with lots of starts and a smaller wing. I guess it could also last 40-45 mins on a bigger wing and slower speeds.
Overall I’m really happy with the reduction of swing weight, especially on the small 3’11 board.
It feels a lot more carvy and reactive.
Here is a video using the nano battery:
Normally I’m doing longer rides where I appreciate the 52Ah battery. It gives almost 2h of ride time. But now in winter I’m happy with shorter rides and more agility.
I was also thinking about the modular solution with 2 packs in parallel. But I have so many batteries already that it’s not really necessary. But if I would start to build new i would definitely go the modular path!
Thanks for the clarification.
Im really impressed by your battery design and will probably build a similar one.
One of the extra connectors is for charging? And are these pressure compensation valves neccessary?
