# ballast

### Sailing yacht - Estimating ballast bulb added resistance?

Dear all, I am trying to estimate the resistance added from a bulb on a sailing yacht in upright resistance. I have bare hull resistance...
Thread by: Claudio Valerio Parboni, Apr 28, 2021, 3 replies, in forum: Hydrodynamics and Aerodynamics

### required fresh water for a vessel?

Hello Guys, I am new here. I am currently doing a academic project about a container vessel. Can you guys please tell me how can I determine the...
Thread by: SeaBoat, Sep 21, 2020, 18 replies, in forum: Education

My boat, a 1960 Rhodes Swiftsure 33, has external lead ballast that makes up about the forward 1/3 of the keel. It is secured with bronze bolts...
Thread by: Swiftsure33, Dec 21, 2017, 6 replies, in forum: Boat Design
4. Boat Design Gallery

### Roll control using hydrodynamic wings

5 meter skiff drawing showing the underside of the hull with one wing extended, using a pair of opposed hydrodynamic wings for roll control
Uploaded by: Wingz, Oct 20, 2010, 0 comments, in category: Sailboats - Monohull
5. Boat Design Gallery

### Roll control using hydrodynamic wings

Drawing showing the wings counter force to the winds heeling force to each side of the boat.
Uploaded by: Wingz, Oct 20, 2010, 1 comments, in category: Sailboats - Monohull
6. Boat Design Gallery

### Roll control using hydrodynamic wings

The wings installed on the boat.
Uploaded by: Wingz, Oct 20, 2010, 0 comments, in category: Sailboats - Monohull
7. Boat Design Gallery

### Roll control using hydrodynamic wings

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...
Uploaded by: Wingz, Oct 20, 2010, 0 comments, in category: Sailboats - Monohull
8. Boat Design Gallery

### Roll control using hydrodynamic wings

5 meter skiff using a pair of opposed hydrodynamic wings for roll control
Uploaded by: Wingz, Oct 20, 2010, 0 comments, in category: Sailboats - Monohull