DiY monofoil (Flying wing) efoils

[SoEFoil]

In parallel of

@tacktun

Anyone else tried foiling without a stab?

Designed for air or water, flying wings have looked the same for almost a century… But could they add anything to efoiling ?

So the question is when will the first flying wing efoil be tested ?
Flying wing hydrofoils do work since the Triton T1 released in Aug 2021: https://www.tritonfoils.com/
Triton Foils releases the first accessible monowing: Triton T1 - Kiteforum.com
Their advantages are: low drag (-25% at comparable surfaces), maneuvrability, can be made in a single mold, easy transport (no fuselage) in car and plane, light : 1.25 kg, … large speed range, safety (no cutting stabilizer, thick wing tips) …

Triton sell their “wing-only” formula 1000usd. It should be possible to build a DiY one with hot-wired foam around a 3D-printed PETG centre core (a solid resin block in the original model) between two layers of CFK.

A similar post was opened by @rowen01960 in April 2020. Triton obviously copied Gurval LEGO 2019 work with his central reflex part… @Toto44, did you push your flying wing prototype forward ?

Blended Wing Body Foils - comments?

Your project is a flying wing. To be pleasant to ride, it needs either actuated flaps or a reflex airfoil section. Foils with GBS using flaps should be on the market this year:. Best candidate so far: Taaroa hydrofoils Taaroa iUP, surf/sup foil with GBS, IA driven - Info for the DiYer Supernova should unveil their solution after the lock down (11th May), postponed 3 times already, In the meantime, you need to change your E817 profile by a reflexed airfoil section. Still in development, ori…

[Gazman79]

Hi

I made a copy of of the Tritton wing just by looking at the photos and movies. It works very well, I just had to change the angle of attack because the nose of my board was riding high. I haven’t put this wing on my efoil yet though.

The wing is 3d printed with carbon fibre rod stiffeners and an aluminium body where the mast bolts.

Because I copied the design I thought I best not release the files.

I was planning to design something from scratch based on similar ideas as you posted above like the Horton but slightly more swept.

Gareth

[SoEFoil]

Very nice @Gazman79 ! Does it float ? Could you post a pic of the aluminium body/core and how it is held all together ?

@SoEFoil

Now the question is when will the first flying wing efoil be tested ?

Found on Triton’s Instagram account, posted 2023 jan 07th : Credit Andrea Stancati on Lake Maggiore Italy:
https://www.instagram.com/p/CnHiCFrKalr/

The remote looked familiar, looks like a Triton T1 fitted under a Lift efoil…
Confirmed here https://www.instagram.com/andrea_stancati/
Long story short: he bent a Lift folding prop blade against a wood log during the T1 test ! He shows how he repaired it (a torch and a hammer).

Other possibility, the Spleene Monofoil from Germany:

Check die neusten Kiteboards - SPLEENE Kiteboarding

[Gazman79]

Yes it floats very well even with an aluminium mast.

I haven’t got anymore pictures of the build, but here are some screen shots from CAD. The aluminium block is basically accurately cross drilled for the carbon fibre rods to pass through and everything epoxyed together, I actually use Methyl Methacrylate adesive.

[SoEFoil]

Impressive, I didn’t expect this when launching the thread. Do you confirm that most parts except the core could be hot-wire cut before being glued and covered with carbon ?

@Gazman79

Because I copied the design I thought I best not release the files.

Since you’ve never touched one and because you didn’t scan it + found your inspiration in photos + your design is different = this is the fruit of your imagination. You have no fear IMHO.
BTW, which airfoil section did you use ? Reflex obviously… What twist angle on the wings (wash out) ?

This is what Andrea Stancati says about efoiling on a monofoil : on 2022 dec 6:

Session 2 with the Tritonfoils T1 Monowing, this time with the LIFT 4.2, 32 mast, 
and most importantly the Stringy adapter.
With the short board, felt less the pitch sensitivity, however riding more 
aggressively it’s pretty evident that the moment the propeller breaches you will
take a dive (due to no gliding). It’s a lot of fun and i’m convinced it will benefit 
overall foiling skills, since  you  have to be 100% present and focused on foot 
placement, steady trigger and  connection with the elements.
I confirm my impression that it needs 20-30% more power output from the motor 
and battery consumption is consequently higher. Today I drained a full battery 
down to 20% in about 60 mins on power level 10.
So far i’m loving it. Looking forward to the further development of the T1 as a 
larger wing would be even better suited for efoiling.

[Gazman79]

My cores are 3d printed which creates the strength between the aluminium block, carbon rods and core, I think a hot wire cut foam core will be too weak to transmit the loads from rod to core.

The foil sections are nothing specific but created by studying the pictures and watching the videos, the same goes with the wash out.

[Toto44]

can you compare consumption to the other wings?

[SoEFoil]

Kitefoilers use sub 1m kite boards to optimize the maneuvrability.
For our use, to calm the beast down in pitch/roll/yaw without adding significant drag, I think that the model could be fitted with a 40cm hollow alu tube as a (stabless) fuselage which would be coherent with your alu core.
The trade model weighs 1.2kg. How much is yours ?

@Toto44, not tested under an efoil yet according to Gaz’ post #1.

[Gazman79]

Hi

My wing weights 1.6kg

No, I haven’t tested the wing with my efoil yet, I wasn’t going to because I’m enjoying my Gong Curve MT too much.

[drlojz]

Mahalo Foil Lovers!
I’m thrilled to join this amazing community! I’ve been enthralled with foils since 2007 and been powered with kites/winds for nearly two decades. As a proud member of Moth sail boat flat, I relish in the search for something new - particularly here at www.drlojz.eu where we can fly, float, ride or even levitate (almost impossible but doable!). And although not an absolute novice on “mono wings” and “tail less gliders”, my experience has allowed me to compete nationally & internationally too – so let’s get creative together!

Picture from the drlojz blog

It’s been an incredible journey working with brands like Naishkites, Flysurfer and several others to reflect on our experiences. We’ve gained valuable insights that have helped us move forward in a positive direction.

The Mono-foil is a fantastic piece of equipment with a surface area of 1400 and double kick wings, also referred to as gull wings. These unique features provide the foil with exceptional Yaw stability, making it stand out from other foils available in the market. The initial files only contain wing information, without any fuselage or mast connection required. To ensure a smooth start, keep the mid-section at 0°deg AOA! Overall, this is an impressive product that guarantees great performance on water.

I would like to take this opportunity to share some files with the community for personal use. However, if you require these files for commercial purposes, kindly contact me directly at drlojz2@gmail.com and ensure that intellectual properties are respected. Thank you.

Files included the *.step wing and the *.obj, mould /one side/ for possible 3D print
Mono step file
Molds Top Bottom

Happy foiling

touch and go
drlojz.eu

[Willy510]

@drlojz That all looks great! The google drive link shows as being restricted, Could I get access to the STEP files?

[drlojz]

Mahalo
@Willy510 and all the others, sorry for the restricted access to the files on the drive.
Hope it will works now, if not send me e-mail on drlojz2@gmail.com
and I will send you the files direct

touch and go
drlojz.eu

[SoEFoil]

To learn how to make composites from a 3D printed mold, there is @visor360 post :

New build from 3D printed molds (very low cost, but high performance !)

Hi everybody! I’m sharing with you my build. It is not finished yet … I started this project around 9 months ago, most of the work was the designs, simulations, testing and optimization (building one is quite easy and fast). Summary 3D printed mold for wings, mast and fuselage 3d printed molds Wings Mast and fuselage Board Electronics Conclusion 3D printed mold for wings, mast and fuselage [IMG_3704] Those part are full carbon fiber and fiberglass and very inexpensive! There is no 3d …

pointing to his site where access should be free (correct me if I’m wrong):
https://make3dcomposites.thinkific.com/