Search results

Hello Everyone, I need further explanation on the dimensionning of a propeller. My method is the following : Determine total resistance > assuming total resistance is equal to thrust > calculate Bu > find all coef etc ... But we always find Bp Delta diagram, but for calculating Bp we need...

Hi, I am immersing in the BV standards (NR500 and NR546) and I am in trouble for the calculation of Nxx, Nyy, Nxy .... require to determine SigmaAd. Would anyone be able to help me on this? Thank you

Hello, I am studying resistance in order to determine power and propeller for a 9m hard chine boat, here are results given by Wolfson power prediction program using stavinsky method: Im a bit surprised at the value of thrust deduction and wake fraction, that induced odd Va and thrust...

Hello, I would like to calculate the forces and tensions into sheets and halyards in order to dimension fittings (cleats, clutches, winches ...). Is there any formula I could use ? I only know this formula : F = pressure in sail = 1/2.ρ.S.V^2.C ρ = density of air (1.29 kg/m3) S = Sail...

Hello, I would like to know what would be a typical Quasi propulsive coefficient for a Sail Drive. I know it is less than a classic shaft, but I have no idea of how much. If anyone have an idea ? I guess only the rotative efficiency is going to change. Thank you for your answers =)

Hello everybody =) One of my dream would be sail on the forties. I found an opportunity to participate a leg of the Clipper Round The World Yacht race. It's an incredible chance for me to realize a dream. But I need a maximum votes to be selectable by a jury. That's the reason why I ask for...