My understanding of the reason for the barge/tug combination is similar to gonzo's. The crew required on the Great Lakes for a tug and a barge is...
wet feet is correct that ventilation can be an issue with rudders. Ventilation is not due to a lack of "compressibility" of the water. It is due...
The mistake is the assumption of some sort of significant "bonds" between molecules or fluid "particles" which take energy to break.
Incorrect. The pressure difference across the foil is basically* independent of the Reynolds number. Reynolds number = velocity * length /...
If the curvature is too tight for the plywood use more layers of thinner plywood.
Why would whether the frames are vertical when the boat is floating be important?
The center of gravity of an unballasted boat of this size is dominated by the position of the occupants. The weight and location of the...
Thickness should be sufficient for required strength which its appears serdar has taken into account with his 30 mm thickness. The NACA 00XX...
You are correct. I was mistaken. Post #180 did not include a quote. I will correct my post above.
Edited to correct a mistake. My original post # 180 started with a quote from a post by a third individual. Was Marchaj having us on?...
The force per unit area a fluid exerts on a surface is conventionally split into two components. The component normal to surface is the pressure...
The standard definition of dynamic pressure is density * velocity^2 / 2. The standard definition of static pressure is the pressure acting on a...
Lines published to illustrate a type of boat may never have been faired with waterlines, stations and buttocks reconciled. Designers have been...
The sectional lift coefficients at design condition can be easily adjusted by changing the blade chord and the twist. Increase the blade chord and...
What definition of Cl are your using? Do you mean the Coefficient of Lift of the blades, presumably the blade sections? Or something else?
All hulls have "zero righting moment" when at zero heel, assuming symmetric shape and CG is on the centerplane. Nothing special about catamarans....
Disclaimer - I am not a lawyer. The comments below are based on my knowledge but should not be relied on by anyone as being accurate or...
The boat in the photo appears to be "skin on frame" construction, probably designed to be taken apart for transport. Almost certainly there is...
You may want to start a new thread with your Freeship questions.
Γ is the circulation, not the vorticity, and is a scalar, not a vector. A scalar does not have a direction. There is no requirement that the...
