My thin pod build (45mm)


#61

very nice! i will try my setup this w.e , so you said the pinon unglued one time, did you glued it back ? what did you use?
if you found a way to weld it let me know, if i have a problem with mine i will try to spot tig weld maybe…


#62

You can 3d print a wedge shape shim to go between the foil base and the board ( in the rear to lower nose height of board). Make a few that are different thickness to swap out until the board angle is flat. 5 to 7mm usually does the trick. Jezza is correct about the tail rocker causing the high nose up angle.


#63

Good chance for your first try @Alexandre!
For the moment I’ve glued my motor pinon with loctite again but I envisage to follow Reisenauer recommandation, going to a goldsmith, a jeweler or a dental technician to laser weld it.


#64

Thanks, i’m just surprised because it’s a home made board, the back 2/3 are completely flat. When i use it for surf foil it rides flat. My current thinking is that somehow the huge 7 1/2 inch prop close to the fuselage is somehow messing with the back wing… i’ll try to angle the back wing too see the impact.


#65

Are you sure the motor pod is not angled? That could also throw it out…


#66

Hi @Silvio, did you share your pod design? Can you please post the link again?


#67

I am OK to share my CAD files, you can find them here: https://files.fm/u/2bcx9rum

But be careful, my setup is not safe: aluminuim propeller without protection!
It’s just a prototype version, I encourage nobody to copy me.


#68

thank you for sharing, i looked at your gearbox mount, it is pretty clever!
Have you a chance to use your efoil? did you get any water is the pod ?


#69

Yes I’ve got water in the pod at beginning. I’ve done some watertight test with air pressure to identify losses, they came from PLA pieces where thickness was low (below 2-3 mm) and from cable output. Seals was all OK.

I’ve printed new PLA with “infill” to 105% and with less thickess weaknesses. This new version seems OK (tested at 2 bars).

I fly now without falling on long distances (severals km), great fun!


#70

I am so glad this motor is working ^^ (just arrived few days ago)
I am around 70 kilo too, have u seen any numbers regarding consumption? Also, have u tried some1 heavy and see how much amps they eat?
Fly on!


#71

I have no idea of my consumption. I will try to ride at dusk to see if i have better visibility on watts display.


#72

Action camera might help with some polarising filter or neutral density filter if glare is 2 much or brightness too big.:+1:


#73

Why don’t you bought an eagle data log. Not expensive and you can add full sensor like temp, GPS, throttle, rpm and much more…


#74

Great session and good video this evening! :grinning::grinning::grinning:
My GoPro has filmed watts display :grinning:

I need between 1500W and 1900W to take-off then minimum 1200W to fly. My batteries voltage was arround 45V.

At the end of the session my motor pod was tepid and my alu box with esc was a little more than tepid.

I didn’t dare to run full-throttle, but perhaps next time!


#75

New session this morning :grinning:

I rode along the coast during 17 minutes for about 6 km (average speed 21 kmph).
I used arround half my batteries’ load so my autonomy is about 35 min (12 km).
It is less than I was hoping but I’m still happy that my setup works pretty good :grinning:

Next challenges: prop protection (duct?), waterproof remote control


#76

You go “far” , i stay around 2km , i had to swim back two times… Have low do you use the multistart ?


#77

So well. Thats mean with a quick calcul 28amp or 1300 watts!:+1:


#78

I can’t use a logger because I have no free space in my electronic compartment.
Only a wattmeter, a GoPro and GoogleEarth to measure distances :smiley:

I cross my fingers to not have a problem off the coast (swim then walk barefoot with a load of 15Kg :weary:)


#79

A new video from outside:


#80

Your design looks really nice! Congratulations!
Do you bought this propeller:

Competitive price Aluminium Propeller for Yamaha Honda 2.0HP 2HP 2.5HP Outboard Motor Parts 7 1/4 X 5 - A

http://s.aliexpress.com/7raAvAfA

I could not find any picture that shows how to assemble it to the shaft. May I ask you for sharing the propeller model with shaft mountings (as stp) ? It seems that this propeller works really well with the rpm and torque of your setup.

Thank you!