Manufoil 2nd buil

SSS 56123 500kv 3:1 ple40

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Watching how it kick on the bench compared to the FR motor Iā€™m not too worried about Torqueā€¦. :sweat_smile:

Itā€™s actually 8650rpm not 9500

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Quick torque calculation for your pod :

Motor is 9400W max so letā€™s pick 7000 nominal
Speed is 8650 no load so letā€™s pick 8500 too
14S / 58.8V pack

T = (9550*7000)/8500 = 7.86Nm at nominal power. Can probably go up to 9Nm at max power.

In comparison to a FR motor (they advertise their motor for 5500W max and 130kv) :

T = (9550*5500)/7600 = 6.9Nm at max power, so yeah you have more torque than a FR motor does.

FR 7" prop asks for 6-7Nm @6000 RPM (rough estimate), so you might probably be able to go up to 8500+ RPM, but I dunno if youā€™ll be able to keep the speed :rofl: :sweat_smile:

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There will be a bit more drop in rpm than that. The FR with the 7 inch does 5300rpm at 50kmh (7650rpm spinning in the air).
but yes will be fun pushing the limit.

Been training reaching 50kmh each session with the FR, this speed run was 53kmh on the Garmin watch.

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Thatā€™s flying, love it.

here to play with numbers
they got the tlf sss 56123 550KV for free

cheers, this is interesting

So some interesting stuff. I installed a new FR motor on the board. Old one still going but thought was time to make a board for the missusā€¦

Tested it today and wow way more torque. Always struggled to get out of the water with the ma800 and it is now going up straight away. The log shows I also only use 200A motor current to get up on the plane. Thatā€™s a lot less than with the old motor. I also seems to use a lot less current at high speed ect.

First motor was repaired after taking salt water and the magnet are corroded. Would weaker magnet lead to increase current consumption and less torque?

Heaps of seaweed today so couldnā€™t test max speed. Stay tuned

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Basically cooked or corroded (= weaker) magnets will increase the kV so motor will create less torque and use more amps. Then probably corroded magnets also create imbalance in the motor fields as not all magnets will be affected by the same level of corrosion so a bit more is lost in lower efficiency.

A question: The FR motor is obviously a better motor than a 6516x but i wonder, is the difference really worth it for a commoner like me that needs a lot of useful performance returns on the extra payed cash?

Depends how efficient and fast you want to go I guess. It is quite a step up versus the 120kv flipsky I used on my first built. Now there is some new option like this 70 diameter motor PWR foil use which is also made by Hobbiba I believe (factory making the 65 for flipsky and others).

Iā€™ll have a look at that motor, thanks for the tip.
I donā€™t like so much to go full out so i think a 6516x will do the job anyway!

about vesc remote setting. In PPM I always had weird noise like out of sync noise free air spinning the motor. No issues using it in the water though.
When I reconfigured for the new motor I by mistake selected the Nunchuck mode and the noise is gone free air spinningā€¦ it also run perfectly in the water.

Always thought the Maytech remote should be used in PPM modeā€¦

I reverted back to PPM and tried to play with the different setting, no way to get rid of this noise.

I find the maker X vesc to be lmuch ouder than the tramper one. Trampa was near silent. The maker x and same motor it sounds like a high pitched whine. If thatā€™s what youā€™re referring to?

No mate it is pretty quiet to be honest. In PPM mode it does this out if synch sound upon deceleration only when I let go the trigger. But it doesnā€™t in much ici mode. I think itā€™s a software/frimware issue. Which frimware are you running on your MakerX?

Letā€™s see how this goesā€¦

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It looks really nice!

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didnā€™t work that well. heaps of prop torque. The board lean to the point it capsize. The rear is much narrower than a body board and the prop all the way backward which seems to not help

You need to design it like and inboard boat.