Thank you, I will try this out.
I got the 80kV, you the 130kV.
I dont know, If it is wise to try a high pitch prop on a higher kV
But hey, its only 2€ PLA…
Cables are made of copper and 2/3 of the length is under water, so it can stay pretty cool
Which is the stab screw you shimmed ? (back wing):
1 - front screw = stab leading edge more nose up = less angle of attack, later take-off but higher top speed
2 - rear screw = stab leading edge more nose down = more angle of attack, earlier take-off but lower top speed (saturation) ?
Almost. I shimmed the back screw 2mm = Stab leading edge more up.
The foil is screwed on from below
Thank you @MaB for sharing your Prop design.
Since i had best results with 2 Blade, i redesigned yours and adapted it for the 80100.
I will test it, if it gets a bit warmer here, winter is coming
Looks good as twin blade! Curious to see how it perform!
Awesome results shared, thank you! Is there a way to monitor the data from the VESC (Amps, RPM, speed etc) without paying another 50 euro for metr components?
As far as i know, Vesc-tool can log too, but not as convinient as with Metr.
And in my opinion, If you have a Vesc, Metr is a musthave and worth every penny
Xmatic , eSkate vesc , you buy a module ( hm10 nrf51…?) and pay the apps , or you buy the module metr.at ( more expensive but high quality ) and get the metr.at app free
Metr.at module will work with the other apps , can you save around 25€ using this others one, but they don’ t do full time logging as metr.at …
For just monitoring you can get the display box from flip sky as well
Only vesc tool does the rpm (erpm) and now new feature on metr.at as I understood
I think I will leave the Metr investment for a later time and try stick with the minimum initially until I am satisfied with the board, even if that means a bit more hassle to analyse my data, so it would be great if the VESC could log this data too to analyse my board once I build it to make sure I dont burn anything up! Do you know if the VESC writes the data to an SD card or how does it work?
Well no torque applied , kv isn’t a fixed value , 14 poles , supposed to be a 80kv ?
Voltage left ( rpm) = voltage applied - resistance of coil x I
What Ri has a 80100?
And i thought, kV is always s no load value!?
Vesc says Ri 15mOhm
And yes, it should be a 80kV
Kv is calculated by spin the motor at a know rpm and measuring the voltage given , so the other way around , 12% off isn’t so bad ,with bemf… of what I understood… it is always a approximative value , just to help to choose the setup for brushless
I think you are talking about Ke there, which is an inverse measure of Kv. It is usually expressed as V/krpm
Okay, i did further Investigation for you guys…
180A Motorcurrent is no Problem for the Flipsky 200A
Only a short test in a bucket, after Few seconds the Motor ist pulling a bit air, and thats the reason, why Motorcurrent Drops…
Turned cooling off today for Testing
And If there is anyone interested in motor consumption in air (with prop), here you are:
590W full Throttle
260W at cruising Speed
And temperture cutoff at 75°C with no cooling and 90A Motorcurrent:
Such a nice focus on data that matter. Would you have a step like that with your 2 best props against a pontoon, a bathroom scale between the pontoon and the board nose (increasing duty cycle) ?