Duotone Wing & Foiling Tech Talk - Foil Basics 2024 

Great to hear! Glad you like it!

The point which we explain in the video is the commun misconception that using a bigger/more powerful stabiliser will give more lift to the setup. Technically speaking, what the riders feels as "more lift" is primarily the location of the center of pressure which shifts forward when using a bigger stab. The value of the total lift generated by the setup actually decreases if the fuselage is kept at the same angle of attack and if speed is kept the same. Long story short, by putting a bigger stab, you end up with a less efficient setup, which requires you to ride with more angle of attack to generate the same lift as with a smaller stabiliser; by doing so, your center of pressure moves forward, closer to your front foot, and that increased front foot pressure is often what people wrongly describe as "having a more powerful foil".

​@@BonieuxJerome This is a great and precise explanation :D Merci beaucoup ! 👏👏👏👏

We are trying to keep it as simple as possible.. It isn't perfectly "correct" and missing drag forces etc but if we had to show the full picture it would be a mess ;)

You said it yourself, we have tried to keep it simple. We have used Kg instead of newtons because most people don't know what a newton is ;) With bigger stab, and same speed, you will need to increase angle of attack of the fuselage to counter the loss of lift from the bigger stab. For this particular case, we have set the fuselage at 0 deg AoA and the speed at a FIXED speed as well, hence the total lift going down with a bigger stab. In reality, the fuselage wouldn't stay at the same AoA, it would increase so that the force balance themselves out as you say, but this is not the initial condition we set. Hope it clears out the misunderstanding and please feel free to correct me if I'm wrong ;)

​@@BonieuxJeromeThank you for the reply! Yes, this sounds perfekt 👍😃