So after using this I have the following updates…
It works really well, however the Molicel P42A cells I am using are not up to the task as I am running 12S2P (2 x 6S2P packs in series). The cells get very very hot and voltage sag is evident after about 6 minutes motoring resulting in having to stop around 10minutes. To be fair I am new to foiling and end up using a lot of power a lot of the time… rather than what this system is designed for (assist only). Ie I am not doing a lot of foiling/surfing. Also worth mentioning is that i am likely killing the batteries as i am riding an Axis ARTv2 999 foil… which requires a lot of speed. So i will try another session on a slower and bigger wing. I should probably rebuild using 3P but I find the 2P setup manageable weight-wise and think more might be uncomfortable.
So I will order some RS50 cells and use those. And will repurpose the P42A cells for a 12S4P setup (I will post details - will be an on or in board setup).
Also I have ditched the original aluminium Flipsky 2-blade folding prop as it is too noisy and I have been using a 3D printed 3-blade prop. This works incredibly well - it is much quieter and has more torque and less battery use.
I got the model from here: Propeller for E-foil / ASSIST - Share Project - PCBWay big thanks to @Bzhwindtalker !!
I printed the hub with an FDM printer (Bambulabs P1S) using PETG-CF (6 layers and 50% infill).
And the most amazing discovery is the Siraya Tech Blu resins - I have used the Black Lava - this is incredible - it has a very high tensile strength and tensile modulus - I am sure on par with the Formlabs printers/resins that the FD team use. So I have printed the props in this resin on my very old AnyCubic Photon printer. I haven’t even sanded them - just washed in IPA (5 mins), dried with a paper towel and post cured for 15 mins (in an Elegoo Cure station).
I have printed spares… but not needed them (to be fair I have only used it 3 times).
