foil

Hi, i am currently working on a prototype/proof of concept of an hydrofoils rc boat, my goal with this prototype is "only" to succed at making it fly. So for my design i went for a main wing an a small stabilizer . It's my first expérience with hydrofoils so i think that i made some big mistakes...

I am looking to build flattened V-shaped dagger-board lifting hydrofoils similar in design to the Nacra 17 Olympic foils for a Supercat 20 tall rig sailing catamaran. I estimate the all up weight including 3 crew to average about 40% heavier than the Nacra 17. Nacra 17 foils: Nacra 17 MKII...

Hello, I am currently desiging a conversion of a motor boat (crescent 425) to a foiling one. I have read Ray Vellinga's book and a bit on this forum and have a question regarding the stability of the surface piercing design. In a canard configuration with a small surface piercing foil at the...

I'd like to introduce WingHopper.com to the BoatDesign community! WingHopper is a parametric wing design web app that allows anyone to create a beautiful, efficient, and accurate wing model. Initially I developed WingHopper for my naval architecture and hydrofoil design consulting, using it as...

I’m at the very beginning of designing a foil with the long term goal to design and simulate a T-foil for an International 14. My goal is not to improve on the currently existing foils but to better understand fluid dynamics and why we use our foils like we do. I would be glad if someone could...

Has anyone seen a foil using bell shaped lift distribution? I have been looking at Al Bowers' prandtl flying wing, for a downwind foiling paddleboard the concept of wing tips producing thrust sounds very interesting.

Sail foils boat

Hello to everyone! i am a brand new 63yr-old? To your group/ I have the fuselage of a "Glass Goose" Amphibious (HomeBuilt aircraft) i have so far >carved up & married a 400cc 35hp? jet ski /to the stepped hull & tested as a proof of concept >works great >needs more power >>so i have cut-up &...

This Dufour 82 with 30 ton displacement has keels and needs more waterline. I'm about to put on sugar scoops but wondered if a foil would help. I see even cargo ships are claiming better fuel efficiency with transom foils so maybe I can lift my transom like this but with T foils . Getting...

Hi all, I am working on making an electric foil boat, that should fit inside a standard 40" container. This means it will be pretty long and narrow(12m*2.4m max). I have a sketch made up: Where legs are where the hydrofoil will be attached. My question is if this design will work: How to...

I am designing a craft for inner and outer harbour cruising in all weather conditions for max 10 passengers at 30ft length. They will not need to be super fast, just very stable, secure and efficient. Have seen some exciting stuff on dual propeller foils recently but am concerned with drawbacks...

Sailed in very light air-never picked up more than the 2mph it was when we got to the site. Moved and tacked very well for such light air. Check out the thread here for video and more-scroll down...

5 meter skiff drawing showing the underside of the hull with one wing extended, using a pair of opposed hydrodynamic wings for roll control

Drawing showing the wings counter force to the winds heeling force to each side of the boat.

The wings installed on the boat.

Hull design. Section A is a flat, front to back planing surface. B is a flat incline to mount the bow wave easily. C is a sharp flat to push the bow up out of a wave. D is a standard bow section.

5 meter skiff using a pair of opposed hydrodynamic wings for roll control