So I got my foil assist board going and am pretty happy with the setup.
Current setup is 12s2p by combining 4 6s batteries, Flipsky 6384 and Makerbase 84100.
This gets me about 45 minutes session time in surf at 84kg on a 40l board and Axis 939 (900cm2).
But I would love to reduce the weight a bit.
I guess this has been discussed a number of times, but I am not sure about the implications.
Obvious choice would be battery. I can go 12s1p, but this more than halves my session time to a bit below what I would like.
Is 10s2p or 9s2p a good option?
I have capped power output at 2100w, so it should be ok for total power.
I have also a 6374 available, which reduces weight only by 100g. Not sure if that is even worth the effort.
Is there any drawback on using the 6374? With the capped power output, I did not notice any difference.
Then there are those cheapish 6354 on AliExpress. Not sure if those would work and how much weight I would save there.
The ESC is also not really lightweight.
Are there options that work reliably and are significantly less heavy?
I realize this is a bit rambling and vague, but maybe someone has a hint on what to try and what to avoid.
There is a point where saving weight allows you to pump more, as long as you have a not so small foil, also depends on your local conditions.
My prop is alu, and a CF prop would save a sensible amount of weight. Full TI bolts set is on the table also for corrosion, strength and weight. The prop hub in full density PA12 is also somewhat overkill.
I gave up so far with maytech 6374, it is lighter weight but was less efficient/torque, maybe just because of higher KV. Saving motor weight vs saving battery weight, it is a balance.
Next one now in progress should be <3kg with 12S1P 21700
EDIT :
Do you have photos and weight of your board?
Full foil weight is also interesting to compare… big difference between brands.
I do not really know, it is integrated in the board.
40l board is about 3,8kg including ESC, RX, hatch and cable to the bottom of the board. Beyond the ESC housing, there is not much to easily change there.
I probably should get rid of the complete housing.
Its sitting in a more or less watertight box with alu base.
I have the Flipsky 6374 and it really feels exactly the same as the Flipsky 6384.
(With VESC limit of 2100w).
I should probably use that one, but I have it set up for my tow boogie to be and do not want to spend more time switching things around and the difference is only 120g.
Why do you want to go 12S1P instead of something like 8S2P for your weight?
I only tried 12S1P two times, but it is significantly less efficient than 12S2P.
Run time wass more like 1/3 instead of 1/2.
I guess the high current is leading to far higher consumption, so my next step was to try 9S2P.
I will try to get a few pics from my setup, maybe I can get a few hints.
Running an Axis setup.
