Wow - well you used the applicable adjective!!
Didnāt fail on layer line so wonder what would cause that to happen - the other two blades donāt show any damage so you didnāt hit anything. Seems weird that the rotation force would cause one blade just cracking off.
It was pretty thin, 1.2mm tip thickness and 4.5mm root thickness, that was ambitious for a home print. My goal was to validate the prop performances before ordering a alu print. That did not work out as expected^^
Ideally, I want to be below current limitations of the vesc at 95%duty cycle to have efficient control and reduce failure risk.
Have you considered trying the Flipsky prop that is too big for Efoil?
Yes I have to try it, can probably get one locally from a friend. Those are reported to vibrate quite a bit.
Turns out my session yesterday ended not because the battery were too low, but because the esc lost a phaseā¦
There are no visible signs on the fet, but it is most definitely shorted on the high side.
Will try to replace it, but separating both pcb is a pain in the ass on makerbase controllers and most two layer controllers.
PPA-CF is definitely not a panacea. For a propeller of this size, you might need to print with a 0.6 nozzle and a 0.3 layer thickness, followed by extensive final sanding. Iām currently printing Volker blades for a new 16s 3p Boogie battery, and Iāve noticed that they break at a 0.12 layer thickness, while they work well at 0.20.
Ordered a ppm>0-5v board to be able to use a silixcon sc esc on base firmware, I have few units with damaged can/halls/uart that could do just fine on the boat.
Safety will be a concern in case of conversion board failure. I will add a physical kill switch on the motor cover, and think about some sort of strategy where full throttle is 2.5v and above 3v triggers a fault to reduce risks of full thottle eventsā¦
