I found this web and Im thinking about to build my own efoil. I was windsurfing some time ago and Im also rc modeller and have 3D printer. I spent two days reading about hydrofoils and e-foils and I have few questions:
I already sold all my windsurfing boards so I need to buy some used. Im almost 100Kg, what size do you recommend? 130L at least? Im afraid it will be very long and huge + heavy. Also what should be surface of wing? Im planning airfoil Aquila 9.3% around 700-800cm2 because of my weight.
Id like to test dual outrunners propulsion system in one tube directly placed and cooled in water. My friend tested this on RC boats and it works for 2 years with no issues (not salt water only lakes). Therefore Im trying to stay under 24V (6S Lipol) for each motor to stay on “safe side” I think with these two outrunners it should work: https://hobbyking.com/cz_cz/kd-53-30-high-voltage-brushless-outrunner-190kv.html If Ill go around 80-90A each, I can get maximum 3,5 - 4kW. I hope this will be enough (I found 2kW should work)
Do you think 25V DC in not salt water is safe for human? I dont want to die during this experiment
is there any free 3Dsw for boat propellers drawing and calculations? I have one but only for airplanes.
this is misunderstanding, Id like to use two outrunners (PULL/PUSH) config with one before and second after the mast. There will be no mechanical connection and probably they will rotate in opposite direction. They will also use two speed controllers. Only point I need to test is if it is better to run them in one tube or with two independent circles around
You are right, but Im afraid of higher voltage from motors directly in water. I know it is not so critical, but that is the reason. Jak mentioned consumption around 2800W, that I can run with 63A which is not so critical. I also hope that I will get better efficiency using tube around propellers (tube) and also with different wing geometry. For me it is important, that I know, that these motors can be used for my project.
Running time is not so different from higher voltage systems, because I will run paralel instead of serial connection.