Duct and Props Design


#1

Hi guys,

I’m a French mechanical engineering student and I am working on a project about an e-foil build. I already design the main part of the project but now I have to deals with the main parts : prop and duct. I should like to design someting with good performance, that’s why I am extremely thorough about the prop and duct design.
I would like to know if you guys can give me some advises about the duct. In addition to being a safety components, it’s also a parts which can higly improve the performance of my Efoil.

I would like to know more about the space between duct and prop : To avoid vortex and be the more efficient, how short should be this space ?

And about the profil of these duct, I saw the rice Nozzle seems to be the best profil for our e-foil. What do you think about it ?

Thanks for taking the time to read my post.

Lucas G.