19.8m LOD 17m LWL 5m Beam 40 Tons Ketch rigged 6mm hull plating. Looking up the Rudder and shaft, that was 250kg for a hollow NACA 0012 foil....
And as Gonzo said before, usually it's a case of basing the initial parameters on a similar design. That usually simplifies the design spiral a lot.
David For a vessel under 24m design pressure dictates initial scantlings. That pressure is dependent on the location, it ranges from the maximum...
Yes entire structure including all framing bulkheads and deck. For one vessel with a moderate sensible practical layout, from the W&M data I...
For a start at 20 meters displacement around 30 to 45 tons is common for a steel sailboat, 40 tons laden is a safe estimate, 50 tons is on the...
Not at all ! Once again: It's perfectly permissible to use grease in a plain rudder bearing. None of the waterproof non-washout greases in a...
Gonzo you do know that there are Non-Sheen Non- washout EPA approved marine greases don't you ? None of those docs you linked prohibit such...
But neither of those links are relevant. Did you look up EAL's ? You can get marine grease that complies. The USA's EAL requirements have been...
What regulations say that ? Grease is a necessary requirement of a lot of immersed equipment, it’s even permitted to use non environmentally...
That's why the excess is wiped off. Important part of the spec these days !
A lot of commercial craft of all sizes use steel ( rather than S.S.s) rudder shafts. Grease, epoxy paint and an anode will see then last often...
It's often observed in Naval Architecture that much of our science is not intuitive. A good example is that boats with poor stability are usually...
Agreed these 100% traditional Colin Archer Redingskote type boats are certainly not particularly good performers, they are heavy slow and...
The larger ships were all called composite construction and were attempts to make larger ships in the transition period, steel truss girders...
Whenever the rudder is cut away for the prop there's adverse drag . Always better to redesign the keel TE to fully accommodate the prop . But the...
