That would restrict testing to those that already own the prop. Last time I checked they cant supply them. I inquired with @Flying_Rodeo to buy one for the reacher tech 80kv, but no response.
Does anyone have the flipsky 100KV Motor? From the drawing the shaft looks very short to properly fix the prop. Anyone using this motor already?
The gray part on top is the size of the flipsky with a pacificmeister 3 blade prop the parts below is a cross section of a 500Kv & gearbox.
Other aftermarket propellers may be better with a larger diameter hub.
Following. Looking for a easy setup to build my first board
1 Like
Hi Virus,
great work as usual.
Can you please list the material you use on this easier direct drive solution (electronics and engine)?
Any chance you have the stl file for your propeller? I would like to try to 3D print one?
Thanks for your work and honesty.
Saludos.
Well my geared setup is shorter than the flipsky motor, but it has to be tested.
1 Like
motor: Maytech 100kv 5000w direct motor
esc: Maytech 300A
Battery: tattu lipo 12s 32Ah
120mm prop, testing 140mm yamaha prop
virus@viruskitesurf.com se ti queres o archivo stl.
8 Likes
Many thanks Virus,
did you ever get to foil with 6S batteries?
i still need to test my build, but i only have 6S at the moment. I can make a serial connection to make 2 batteries pack to have a 12S, but wanted to try with 6S first.
This is a 65150 type clamp concept (yes I will share the STL files when finished) .
This is a first cut concept only, it will be a compression clamp on the back of the motor, aluminium 6061 rods with studs threaded in. will use the rods to transfer the radial torque & a forward plate with a nose cone TBA design.
any advice is welcome.
3 Likes
Design looks good. How do you plan on bringing the phases through the clamp and into the mast?
a forward mast deflector , not sure who did it first but I have seen a few build that have done it. Builders: how not to drill your alu or carbon mast! - Foils & Boards - FOIL.zone
Hi everyone!
from the pictures for the 65160 motors it seems that they are using distributed winding. It means these are PMSM motors not BLDC (like FR ie. concentrated winding). It means they would require at least VESC controller as it can drive it in FOC mode.
I am pretty sure that 65160 can be used with regulars ESC like swordfish with trapezoidal drive signal but I wonder what is the performance penalty?
Any toughts?
1 Like
Yes, based on the photos, you’re definitely correct about the Hobiba motor being PMSM, and not BLDC. I’m interested to see how they stack up when run with a trapezoidal supply. I would still happily take a punt. Maybe we can ask the manufacturer for a concentrated winding.
1 Like
From what I read you can use trapezoidal voltage to power a PMSM but it create audible noise vibration and poor efficiency. Did you notice noise with the Swordfish Virus?
PMSM are in theory more efficient, less torque ripple than BLDC if driven correctly so that’s not a bed thing.
That would mean Virus first results would be improved using a VESC in FOC mode as suggested by Mike
1 Like
In general FOC will yield better efficiency (not necesaraly power on BLDC) as it is energizing all three phases all the time and thus using more copper to create magnetic field which in turn creates less copper losses(p.s. BLDC driver energizes only two phases at time-and third using for backEMF sens).
I had previous experience with VESC on foil and it is quieter in FOC mode.
I suspect that FOC with PMSM could give better efficiency,power and less noise…
Can anyone measure rotor diameter of 65160 motor?
So we can compare it to FR rotor which from picture looks like 43-44 mm.
As rotor diameter directly influences motor torque we could compare two designs.
Also stator lenght would be more useful data than overall case lenght…
1 Like
Lots of noise with the Swordfish running 80100.
Well Jezza should be able to test I think the arc200 got a FOC mode
1 Like
Can you run FOC if you haven’t got position feedback? Is it possible to use the back EMF signal for position FOC?
I guess yes , I run foc with no sensor in the motor , openloop … I am not experimented enough to tell if the bemf is used all the time…
1 Like