Hi Pete, I think you are going to have to invest some time reading up the background naval architecture, otherwise it will all end in tears, or at...
Roll gyros are about the same size, price and power consumption as installing aircon on a boat . weight can be up to 2% of displacement. They...
I agree. This is a very high aspect ratio rudder so the CP will stay close to 25% chord. Puzzling that Jefa put the stock at 18% chord. Moving the...
Nope, don't understand that, sorry. Tiller torque is generated by the hydrodynamic moment about the axis of the stock, regardless of rake angle...
Hi. yes, I am a naval architect familiar with this subject, so happy to talk technical if necessary. Is your background nav arch or aero eng?...
The 1/4 chord line is merely a reference line for measuring moments. Are you saying that if the rake angle is large, CP moves forward with...
Cavitation on a surface piercing foil at just 20kn? Surely it will ventilate before pressures get low enough to create cavitation?
Err... isn't it the other way round? The centre of pressure moves AFT as the angle of attack increases in all the experimental data I have seen...
Be aware that the optimum TE shape for zero leeway is different from that for usual windward leeway angles (3-10 deg). The info is in Hoerner's...
My boat is as per the profile drawing posted by Joakim (the solid line profile, not the dotted one). picture attached. it is just a rectangle...
No difference. Good thought though.
It is so bad it needs to be solved; in my view an overbalanced rudder on a hand-steered boat is dangerous. I have sailed quite a lot of boats...
It might be, but I have no proof. The only definite thing is that it is overbalanced under power and underbalanced under sail, regardless of boat...
I have a Van de Stadt 34 with a spade rudder. The rudder was nicely under-balanced when sailing ( i.e. just a bit of feel), but overbalanced under...
