Hi Tom Speer, I stumbled over a paper you wrote to the Chesapeake Sailing Yacht Symposium about Hydrofoil Section Design. You mention there that...
Hi Tom, Thank you very much for your illuminations and the comparisons; it’s becoming educative – I like that a lot ;-)) Now it is very clear to...
Hi Tom, Thank you very much for your advice; it would make a lot of sense. I could manage a rudder thickness of 32mm and go with a NACA 0010 with...
Hi Thomas and Tom, Thanks for your answers. I don’t think I would be happy with these ogive sections. I can imagine though that they might be a...
Any designers out there that have a good handle on what the best rudder foil shape, size and design would be for a 7.70m/26’ sharpie hull Proa...
Composites have a big variety of methods available; we have constructed a very light proa with a much smaller size of plywood thickness demanded...
Well, I am happy that I found the comparison again; there are doubtlessly better production methods than the plywood method. But when it comes to...
I wonder: 9mm ply equals (34 oz) 1150 gsm w/19 mm core = weight of foam = foam 1.52kg/sqm + 2X ( 1150 gsm + matrix 1150gr) = 6.120kg/sqm ??? The...
I found it: http://multihullblog.com/2010/11/plywoodglass-strength-comparison/ Kurt Hughes on Catamarans, Trimarans, and Boat Design...
Somewhere I have seen a comparison of plywood thickness and foam sandwich thickness. Don't remember where. Has somebody an idea? Tsan
CatBuilder: thanks for the data;5lb foam though seems to be very light. gonzo: Gerr's 'Boat Strength', chapter six is referring to cored...