Rick, Thanks once again. I don't live all that far from Bolly (same council area) and will make the journey. I haven't so far because the...
Rick, You are indeed the master. To have made 30 to 40 props, your dedication must be exceptional, I am most humble. I have plenty of...
I've come across references to Kappel propellors which have surfaces at the tips of propellor blades which slope in the direction of travel. They...
Sigurd, I will think on the proa design to see how I can use it. As construction has not yet started, I have time to be flexible. The big...
Thank you again guys. I have got a lot to think about. I could not get hold of the Michlet software (internet blindness I suppose) and have not...
Ad Hoc, I'm afraid my hull cross-section shape will be pretty crude due to my poor skills in this area, but I am heartened by your PDF and that...
Thank you gentlemen, I am planning a long journey by pedal powered catamaran. The hulls will be 4.8 metres (16 feet) long with a length to beam...
Thank you Rick. I am trying to minimise the propellor RPM of a pedal drive system for a cruising boat. The target is about 3 knots at about 100...
Suppose we have a two-bladed propellor with a radius of 12 inches turning at (say) 600 RPM. This gives it a swept area of 36 x PI square inches...
