Sorry about the misinterpretation. What I meant is that the pontoon thrust test (credit to @Frage) and similar to bollard thrust test for boats with a crane scale (so a pull test) is a simple and cheap way to sort between a race horse and a donkey.
As this test is a way to remove uncertainty about any motor’s capabilities, Reacher Tech should be able to provide us with these simple results in standard efoil conditions (say: 130mm prop, 10 to 14s tension, average pitch).
So @Flying_Rodeo, do you think you could be the first efoil propulsion system manufacturer to communicate on pontoon testing ?
Yes very good. The static thrust of the propeller says a lot about the propeller potential. However, it is most important to determine the efficiency of the propeller. The propeller thrust is then increased very easily only by increasing the diameter of the propeller or the pitch of the blades. Standing water is sufficient to measure the efficiency of the propeller.
Yes but this is a thread about FR efoil , i agree with you about propeller dynamic but i think it will be hard to gain everywhere for take off , long time cruising … To me ( and i am only guessing to what i have experimented flying) there is not ONE good propeller, it is depending on what you want or need , if the propeller gives me what i want i don’t mind loose 10min of riding or change battery
But i will happy to see a nice designed propeller
I can measure the efficiency of the propeller. If the propeller has little efficiency, I can improve the shape in 3D CAD.
Every propeller should have the highest efficiency, thereby significantly extending the length of the voyage. The propeller thrust is then increased very easily only by increasing the diameter of the propeller or the pitch of the blades.
Flying Rodeo and the CAESE team with their parametric CFD SW have set the bar pretty high already.
Do you think you could do any better ? 2015 › CAESES to 2019 › CAESES
including 2016, 2017 and 2018
Yes, I am able to significantly increase the efficiency of the Flying Rodeo propeller. In the photos of the drive system from FR I see various deficiencies in the propeller and the pipe. But I can increase the efficiency of a propeller from another manufacturer that would then sell the improved propeller to the forum members. The first step must be this: first the efficiency of the propeller must be measured. Propeller efficiency is measured at static thrust. If it is low, then the cause is determined - whether the propeller has the wrong blade shape, or the number of blades or hub shape, whether it is suitable for e-foil and for nominal RPM.
I’m about to order 2 systems from FR to then make my own e foil SUP board for surfing and riding waves. I want to ride waves NOT just high speed on flat water.
I have 3 x 3D printers CNC machine and lathe at home but having made my own electric surfboards for the past 8 years i know how much endless tinkering and fiddling is involved with DIY systems and this time around i just dont know if i can be bothered building a full DIY motor pod + im super time poor these days … i just want somthing that works and go e-foiling.
Can i ask how much you weigh and how easy does the motor system lift u out of the water?
ALSO : what speedy and battery setup did you end up using for yourself.
Why dont u just buy FR prop, measure it, optimize it, show results and then sell here? I dont get why u already havent done that. Sounds like 100% win for every1 including you.
I have a Flying rodeo set up and I love it. The boards are the perfect size for agility and carving. Bigger boards are fun but not great at performing tight turns. David’s motors and propellers are very efficient for a direct drive. I am only pulling just under 40 amps at 30 kph. I am planning to order another one for my wife. Well done Flying Rodeo.
I for one, there are plenty of things I would be willing to do with a SW file (eg STL) and with the SW applications that I master but I would not necessarily spend 200 USD if it is not the right time frame . What I like on this forum is the diversity of profiles.
@Dynamik, while waiting for someone (could be @Flying_Rodeo) to submit the .stl file of a propeller that works well, could you write a table with coments or improvements regarding the list below which made the creation of this forum possible … Then we know that a 3D printed propellers bends at high rpm which is detrimental to the efficiency, creates slip, etc… . Could you suggest some recommendations (thickening the blade roots maybe ?) that lessens this effect without loosing too much on global efficiency ?
) and similar to bollard thrust test for boats with a crane scale (so a pull test) is a simple and cheap way to sort between a race horse and a donkey.
♂:dash:
. What I like on this forum is the diversity of profiles.
