The forward portion of the bottom surface with the straight sections and changing deadrise is not developable. A developable surface bounded by...
For what it's worth, which may not be much, a prototype high speed outboard powered, composite hull open "patrol" boat with an intentionaly...
A 12 minute 40 second video about building the RNLI Shannon Class Lifeboats at the RNLI centre in Poole, England: [MEDIA] A website with similar...
The Maine Island Trail Association has been using Lund SSV 18 aluminum outboard skiffs for over 35 years to access the approximately 200 islands...
The weight you use needs to be weight of the boat PLUS weight of the occupants and gear. Lighter construction does not mean the occupants and gear...
The jouney from the nearby dock to the mooring was its first journey in perhaps a decade.
I now have some more information about the vessel. It's a liveabord been tied up locally for something like a decade or more. The curved roof shed...
Moored in Rockland, Maine, USA 13 June 2025. It is different. I know nothing about it. These are not AI generated images but photos of an actual...
You should start a new thread on this topic.
I previously posted this on an earlier thread: Steps for a slower planing hull...
I'm going to return to the question in the first post - why is the result of calculating the height of M significantly different at 0 degrees...
An airfoil with two facets, one upper and one lower, works. Commonly known as a flat plate. they have been used on many boats as centerboards and...
First step is to write down a set of "requirements", and work out a preliminary floor plan and size. Since the vertical height inside will...
The F117 faceted design was caused by the "stealth" requirement, not aerodynamics.
Unit conversion 1 m = 100 cm 1 m^2 = (1 m)^2 = (100 cm)^2 = 10000 cm^2
Very short version: There are no legal restrictions in the US on copying the shape of a hull, provided the shape was not patented less than 20...
I assume you are interested in calculations for static stability. Orca3D provides two options when calculated hydrostatics at specified heel...
Boat hull shapes are designed for a particular displacement or range of displacement. A boat built lighter than the design displacement will float...
This is a chart that Ad Hoc has posted in previous threads. Note that the "hump" becomes less severe as L/D ratio increases. [ATTACH] Each curve...
I have seen Resistance vs Speed curves with the shape of you first graph (a), but not Power vs Speed curves. If a Power vs Speed curve has that...
