Printer is a Bambulab H2D printer, and the profile used is the one that comes with the Bambulab filament (it’s auto selected by the printer as the info is on a RFID chip within the spool)
Using a 0.4mm hardened nozzles
The pitch is set before you tighten the nut to attach the prop.
Friction should keep things in place.
Hi Kian, What brand PET-CF are you using?
Please share your experience with this prop. I’m going to print it and test soon.
We (my dad and I) are using the Bambulab brand.
See: CF Reinforced PET Filament | Bambu Lab USA Store
Small note: We normally anneal the projects when using PET-CF. This makes it super strong!
more info here: How to anneal your PET CF parts for better performance - UltiMaker
@AlexCyprus I just had ACL reconstruction, so I won’t be able to test for a while.
However, some friends here will test it, and I’ll report back as soon as I have more info.
I have printed it with PLA. Seems blades are too thin and weak. Unfortunately my experience in 3d modelling doesn’t allow me to change the blades thickness.
This is the modified 3 blade version.
(Still needs some sanding)
Printing an extra thick blade now. When okay I’ll post it here.
That looks pretty nice as a 3 blade. Clever cad work on your part.
What could be interesting is sticking a Fliteboard blade from a step-format scan to a threaded stub of this multi pitch prop… Best of both worlds, just thinking …
I printed this in Bambu PLA-CF and would share the following opinion since you asked.
Interesting design - likely a lot of work to create and way beyond my CAD skills. Also might be fun to try different pitches but with two blades that appear to be more flexible than the benchmark Flite prop I have doubts about any performance improvement over it. Perhaps the 3 blade version that @Kian is working on might do better.
I would also point out a few things that might be of concern.
the large cutouts don’t seem to have a purpose other than a tiny reduction in weight and might be a point of failure - compared to a more solid “disc”.
the area where the shaft pin goes isn’t very big limited by the cutouts driving the need for a shorter pin.
the rotation to change pitch isn’t very “smooth”. That could well be my printing skills or the material I chose.
the blades I printed have a substantial flex compared to the Flite prop so need to be either thicker or printed with material stiffer than PLA-CF.
See photos below
Not too surprised by this. Have you printed any other props with your PLA-CF? I think another point of comparison would be this multi-pitch design and a traditional blade design printed from the same material.
It was just an exercise for my dad (and me), but here are some pictures of the 3 blade prop.
We also made the blade a little bit thicker.
I would love to share the .step, but as this is not my design I am not sure if I get into trouble by doing so.
I have printed other props such as a Flite “clone” that I found here but the result although likely good enough was not as stiff as the real thing.
My viewpoint is that this variable prop doesn’t have much use to us other than an enjoyable exercise in printing and playing around with. Personally I wouldn’t leave shore with it unless I had a buddy with some type of tow vessel in case it broke.
The reasoning behind that is we have a very good - inexpensive efoil prop in the Flite product. It’s likely that during its development they tried different pitch’s etc and found the optimal one for the Flite motor. We just lucked out in that it works well with the classic 65161 type motor many of us has chosen. 
It has been fun for me as well. Nice way to expand 3D skill is to take something already done and tweak it a bit.
I applaud your reservation on not publishing an alteration without explicit permission from the original designer 
I remember somewhere reading that Dave@flite did exactly that test lots of props before the release of their product. It may actually be on this forum early days.
Yes, did exactly that. Many of us have enjoyed the fruits of his labor and tooling mold
Why oh why do I always end up at https://foil.zone/ when I click a link on this forum!
Example. I clicked the link @S_Roger posted, and it redirects to foil.zone.
I want to read the thread in that link, and not go to the main site!
When the link is put in a quote it works fine for me.
Same thing for me since the forum moved from efoil.builder to foil.zone a couple of years ago. Looks like some javascript issues.
As you’ve just shown, a link between inverted commas or preceded by a single works if you’re the author. Most are simply not aware of that or don’t bother when they write.
What I do is copy paste the post first words in the search function and voila…
That’s what I do too, but it’s 2025 now.
A link should take you to the intended post 
I was a bit lazy and just stuck the link right in there. What does work is the hyperlink function. Select a piece of text and add a link to it, and that always seems to work.
Please do not get me wrong! I’m not blaming you!
