I forgot to mention that i did try a bunch of prop and test power draw on each and just did a crude hand held thrust assessment.
the 3D printed props did well IMO and the best one i made perfectly smooth and out of PC MAX a poly carbonate 3D print material which was super strong / stiff.
I also purchased a FR 6" pitch prop for comparison as well and tried that. Its a work of art and definitely gave me more efficiency, more top end speed and more thrust than my best 3D printed prop.
The FR is expensive vs printing something for almost nothing BUT with all the effort we go to to get out of the water and the power we put into the motor i cant see the point in running printed parts when there is so much to gain from a proper machined part. IMO and testing anyway.
but it way a lot of fun to play with printed props. that all being said the printed prop would be safer for learners as it has a very rounded LEdge
My hypothesis is that the surf program of your foil has some responsability in your max speed (designed not to be faster than a 3 foot wave) and acts as a open parachute passed 16/18 knots.
Curious to know what are:
I have the āoldā FL propeller , 3 blades , i donāt known if the design (pitchā¦) had change but i was not able to get more than 3100rpm ( small motor geared) , which is about the same here , 80-85% of a 6s with ā170kvā
Have you measured the pitch?
Yer Iām not chasing speed atm more so just a nice satble setup for riding waves that dosent go too fast as a waves energy once caught is like a TURBO boost that doesnāt stop. In fact once in front of the wave I reduce throttle or somtimes I can even foil with 0 throttle and the wave has so much power it overides the drag of the motor.
I have two wings. Axis 102. And the 82
I have tried both and as u would expect the 102 has more.lift and gets out of the water much easier. Uses less power and is more stable. Conversly the 82 has the opposite aspects vs the 102 but did not increase top speed much and i thought it was going to be more.
102 wing 20km max speed. 80% 17 km
82 wing 23 km. 80% 19km
82cm Wing Technical Data:
CHORD: 222.7mm
ACTUAL AREA 1528 square cm / 236 square inches
SPAN: 82 cm / 32 inches
PROJECTED AREA: 1443 square cm / 223
102cm WING Technical Data:
CHORD: 250cm
ACTUAL AREA: 2051 square cm / 318 square inches
SPAN: 102 cm / 40 inches
PROJECTED AREA: 2013 square cm / 312
Probably the new design for direct drive , donāt recall exactly but i measured at the time a lit less the 9" on mine , maybe @Flying_Rodeo can confirm ?
I only ever tested the 6" prop on my out runner the 7" prop came with my FR masts and motors and since playing with my FR setup i never went back to the OT setup as there was no point.
the 6" on the OT it was definitely more efficient than any other prop i had used in the past which was no surprise.
As for my FR setups there really is no comparison to anything DIY its just WAY better in every way.
PROS :
The motor is MUCH slimmer in diameter
Is a LOT more efficient power wise which was a surprise to me as an in-runner and they normally suffer from lack of torque compared to OT runners.
Truly needs NO maintenanceā¦ i only spray it with fresh water and thats it.
It has less drag on the waves when i throttle OFF even with the prop guard
I can foil on 6s
Cons
It just works 100% out of the box and kind of spoils the R and D build it yourself fun and experience ā¦ but to be honest i have built lots of DIY systems and sometimes i just cant be bothered and the FR motor just eliminates the DIY failures and goes straight to foiling.
I was not expecting it to be as good as it is if im honest considering the FR web page / lack of info is not confidence inspiring but it just works so well.
6" vs 7 " hard to say one goes faster than the other but i would say the watts input for a given speed is VERY similar so i run the 7" as standard now
Hmm, 63100 ist slimmer, isnt it? and uses 1-1,2kW for foiling.
1,5kW for 25kph.
Sadly i have never seen real world logs or consumption for 20kph / 25kph with the FR Setup
I was referring to my larger 80mm Out runner I originally used so compared to that the FR motor is much slimmer. A 63100 would be diffrent.
I have already posted videos of this / power draw on 6s.
I have a data logger in my new board I just need to get out on the water and get some data but itās been winter here. Will try and do it this weekend so everyone can rest easy with data.
But data aside the FR just works. If somone can afford it why would you not unless the diy process is very special to you.
Iām new here and have really enjoyed the dialog and great projects! Your test setup looks good! Maybe what I am about to say gets answered later in the thread. Sorry to start after the fact a few years later with a concern I have, MAC, with your idea to put your rotating outrunner magnets close to the inside of a metal tube. This will likely cause a problem with eddy currents in the aluminum tube because of the moving magnets and create drag on your motor. Iāll keep reading to see if this was already addressed.
Iām new here and have really enjoyed the dialog and great projects! Maybe what I am about to say gets answered later in the thread. Sorry to start after the fact a few years later with a concern I have, Winging_it, with your idea to put your rotating outrunner magnets close to the inside of a metal tube/pod. This will likely cause a problem with eddy currents in the aluminum tube because of the moving magnets and create drag on your motor. Iāll keep reading to see if this was already addressed.
!