hydrofoil

Greetings forum, As suggested by the moderator of this forum, I am writing this as an addition to my reply to a 19 year-old thread requesting information about a very specific boat of this type. The Aquavion 10p Hydrofoil (also known as the "Aquavit" and, in some sources, "8p" instead of...

Looking for boat designer who could design a new project 6.5-7.6m active foiling motorboat. We require experienced designer who has experience in active foiling projects. Currently we are developing our own electric POD powertrain in 40kw peak power. The boat will be all carbon and fully...

Hi Everybody, I intend to design a cargo aircraft for take off and landing on water. There are classic shapes for the hulls and floats of such vessels, which have not changed much since the 1930ies. Unfortunately these shapes create a lot of drag when airbourne. There are also ground-effect...

https://www.tradeonlytoday.com/industry-news/candela-raises-additional-14-million? The article says they are going to use this as a passenger ferry on Lake Tahoe. That's a Federal Waterway. I want to know how they are going to comply with the Jones Act?

This is what I need in a boat to be used for global travel: *ease of build - I will build the boat myself, learning as I go, and starting with hardly any tools, and zero boat-building experience. *energy efficiency - it needs to be fast where needed like a catamaran, but also like a hydrofoil...

I am designing an electric hydrofoil boat, and need help with a few key details. The hull of the boat will be roughly 13-15 feet long and 4 feet wide, made mainly of polyurethane foam with an aluminum skeleton, reinforced with a fiberglass and carbon fiber coating. Ideally the hydrofoil would...

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...

Looking for some of you more seasoned hydrofoil guys for a partial hydrofoil idea I've been thinking of. I have a imemsa 26ba panga from Mexico that has a nasty wet ride in confused seas. The BA just means it is a high side boat. I regularly take this boat 50 miles one way offshore. I was...

Hello everyone, I have built a waterbike with foils and have tested it on the water, but my 16(diameter)*10(pitch) inches aircraft propeller seems to be very unefficient. My gear ratio is of 1/4. I am searching a new propeller with a greater pitch for my bike, and i wonder if somebody could...

I am relatively new to this site but have noticed that this Propulsion Forum segment does not have a segment devoted to what may be considered non conventional marine propulsion systems, an example of which is listed below. Caudal fin propulsion is is one of several biologic propulsion...

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...

This question has been nagging me for a while, and I can't seem to find an explanation for it. I'm an engineer that has had to deal with fluid dynamics in the past. Theoretically the ideal shape for an object moving through water is more along the lines of a hydrofoil. Nature would seem to...

Dear All, To add to a Maxi Racer 90 foot. L= 4.06 X V^2 X S X Cl or the Faugh.. calculation 1/2 length of boat to calculate. Basically AC 75 s are almost 80 and 90 Maxi Racer S/Y Milene is 12 tons not 7 ! The Keel is 10 tons that has to be changed to a torpido still to have some balance...

I have seen that there are aluminum extrusions available which directly work as a hydrofoil for some uses. I am wondering what would happen if I installed one, fixed, between the hulls and under the waterline on a cruising catamaran, about 1/4 of the way back from the front so it would be at the...

Hello guys, I'm looking for help Next year we are going to have the southamerican windsurf championship in our country and the main event is foiling. We have racing equipment, but we want to introduce more people into the sport, so the idea is to make a wing that turns the racing equipment into...

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.

Most foil boats look a lot like normal sailboats with a couple of distinct changes.. Instead, lets go back to the drawing board and design something specifically for the hydrofoil. The Hobie Trifoiler is an example of something designed specifically for the foil, but I don't believe it went...

Hi everyone I am looking into wasting some money on modifying my boat. She is an 18ft Jeanneau Microsail (replica) it was built here in South Africa with a solid deck (no balsacore) and strengthened in a few areas that were issues on the original boats. A 1.5m fixed keel was used instead of...

Hello, I have started windfoil this year and really enjoy the practice. I look at better understand how windfoils work, and how different designs compare. I learned a lot from: http://mauiultrafins.com/technology-2/hydrofoil-mechanics/ Ellway Aero-Hydrodynamic Designs...