I like the idea of using another trigger source other than your hands.
It seems to me that the most likely time for someone to fall is on getting up to speed from zero. Without having direct control over the blades I’d be concerned about accidentally falling on the prop.
Maybe a high motor mast mount + prop guard would make that safe enough to try and get some further learning?
Has anyone been successful using a 6354 120kv outrunner with a foil assist project on 12s? Looks like it might be at the bottom end of what we need power wise, fits the standard FD prop hubs, and is about half the weight of a 6384 motor. I have seen it mentioned a few times on the forum as an option but have not see one in use.
I guess it’ll be too small, the stator will be really short with the dead length needed for clearance, covers, end windings and such.
Checking here:
Stator is 25mm long for a 6354 in the link vs 45 for a 6374 (in the link) so it’s 56% of the torque capability. Maybe with a light rider, higher kV / higher current and a low pitch prop?
The maytech 6374 is considered as the bottom end of what is foilable, I don’t recall the stator length but pretty sure it is more than 25mm.
74 vs 84, 10mm less so 45mm stator.
Yeah, i remember now, I think same measurements are higher up in the thread 
But i wonder what can be achieved with a 6354, 200A phase current, 200kV and a 3” pitch prop. Something for @s9tim to test?
I’m in the process of putting it together. I may be mad but I’m wanting to try it for a very specific need. I’ve got a few set ups now with the Ali 6384 and saite 6384 but I want to build the lightest set up I can to just give me the slightest edge on my DW board in DW conditions. I’ll be using a 12s1p pack with p50 cells. This has already been built and works very well with a standard 6384. The weight of the pack alone is so much nicer for pumping on tiny lumps and chop. I have a 7ft 8” DW board that I built a while ago that comes in at 6kg. I currently use an external box with it but to reduce weight, I will put the components inside and use a screw down hatch. I’m keen to at least try the 6354 in this build. I am sure that the 6354 will have considerably less power but it might just be enough for my needs. I have it already and it is so much lighter. It looks tiny though! I can swap back to a 6384 or 6374 if needed. I’ll report back in a few weeks once it is all put together.
With good bumps and a paddle, I think it could work, even if a flat water start proves to be impossible.
What is the KV? torque = phase amps x KT where KT= 1/KV (needs kv in rad/sec)
On 12 S you need the lowest KV you can get, or a smaller prop than what we are used to run on bigger motors, as you may not be able to generate enough torque without stupid high phase amps, or reach magnetic saturation before that.
My effective range = number of starts with the maytech VS the ali 6384 is about 30% less. so what you loose in motor weight you kind of have to increase in battery weigh or sacrifice the range.
IMO it is due to three things, first the motor needs higher phase amps because the KV is 150 VS 120 for the ali, then second is because it is making less torque, each start takes longer and uses more energy as it does not have the torque to lift the board up before the foil fully engages.
Third; the smaller motor does not allow me to fully discharge the battery, because of the higher amp draw causing LVC power reduction much earlier.
This one is 120kv. On AliExpress there is a variety from 120kv all the way up to 250kv. I’ll have my paddle (which will be doing a lot of the work) and I use the axis 1300 png foil which is about as big as they get. It cost £30. It’s worth a try at least.
Efficiency wise i agree but if you’re looking for the absolute lightest setup to get up on then might be possible with the smaller motor, my thinking is that he lower kV might not make sense since motor won’t be able to make the same max torque, then to increase power you could aim for rpm instead. Go to higher voltage maybe?
The lvc is a bummer but for the motor weight difference you could add 6pcs 21700 batteries.
FYI: AliExpress’s 11.11 sale is today. With a $12 coupon (for purchases above $89), these are the current prices I’m seeing, including shipping:
Flipsky remote VX3 pro $82
Maytech remote v3.0 $92
Flipsky 6374 waterproof motor $100
Flipsky 6384 waterproof motor $123
Sequre 12200 esc $68 just add another product and $25 coupon above $169
Sequre 12100 100A esc $45 with $5 coupon Has anyone tried this small 100A ESC? It might be sufficient…
These ss 316 bearings got a 50% lower price now - take a look at my current cart and the previous order.
Certainly good value for money, nearly on the market, curious to know the price tag
It’s funny, I’m stuck on the best way to transition from the three phase wires coming out of the motor to the one wire going to the wire gland into the electronic box.
I’d love to the keep things clean and not have three wires dragging around along the way. I’ve seen a few solutions here such as: wrapping the three in mesh, replacing the three close the motor with a single 3-conductor cable, to just leaving things loose.
Either way, there’s a need for a waterproof splice. Either a removeable one, or a sealed permanent one. In the case or permanent splices: what are people doing for reliably sealing phase wire splices under water?
Just curious if anyone had some thoughts as to what things failed or worked best for them. Right now, everything is working and I’ve got 3 phase wires wrapped in mesh going into a waterproof connector above water that then transitions into a single wire entering the wire gland. Or should I cut the phase wires short near the motor, splice and seal them from water and have a nice clean single cable run to the box?
The china assist
Good form factor but it doesn’t look very powerful in the video. Anyone know what battery it uses?
I’m having an absolute blast on my DIY foil drive inside the board. I love it. Power is fine in this with a 12s2p.
12s2p 21700 I assume? How long of a session do you get and what is the resting voltage when you can not get on foil anymore?
Yes. 21700 cells. P45b molicel.
I get an hour on a pack. I don’t ride constantly though. If there is a lull in sets I’ll come off the foil and sit around for a while and I’ll take a few breaks in between a good run of waves to chat to friends etc. I tend to ride big foils too which helps run time.
I have never found the point when I cannot get up and going but always swap packs at 38 volts as a minimum just to keep some longevity in the packs.
Ali 6384 vs maytech 6374
