Hi, On consideration I think you are right about not designing masts to break. It would take a lot of luck to work right - and luck is usually in short supply...
Hi, Got rudder back online again, extra glass at gudgeons. Tomorrow winds Easterly 13-18knots. Proably won't reef down. Get away early for a couple of hours,...
Excellent. Look forward to hearing how it goes. I have ripped all the tracks off for my rudders, will be installing a much easier system for getting the...
Gentlemen! The following statement is so simple but so true. To most of us that come from the mono hull world of slow boats this obvious truth is not obvious. ...
In the proximity of bridge pilings or other boats? I don't think so. Jim Baltaxe 8 Knoll Street Island Bay, Wellington NEW ZEALAND +64 (04) 934 1407 027 563...
You don't know Robert. ;-) (just kidding, Robert) When I move up to a cruising multihull from the current daysailing/camp-cruising cat, I'll want to make sure...
G'Day, Great sail yesterday, top speed was up towards 15 knots I'd say. Trying to take it easy on the masts as they just seem a bit small diameter at the...
HI, ICW, is that mostly a fairly narrow river like passage, or is there some bigger openings like Chesapeake bay? A boat the size of Visionarry - you better be...
GDay, Can someone in the know give the data used in calculating the amount of carbon used? I remember that you get the strength of carbon as a constant, then...
Looked at theses boats in Australian Amatuer Boat Builder, and realized just continue the tube up out of the hull and cut a 'side' out and put in a hinge . ...
Doug, GDay, Can someone in the know give the data used in calculating the amount of carbon used? I remember that you get the strength of carbon as a constant,...
G'day, They have comparatively low righting moment, so yours will need beefing up, but the idea is sound. The strongest, lightest and easiest way is to glass...
G'day, A bit more to it, but you are on the right track. There needs to be carbon at +/-45 as well as the lengthwise material. Best if there is a layer at +/-...
Hi Rob, I don't think I was thinking right. The tube/ tabernacle doesn't rotate. My idea is flawed. What weight are your masts? How about the wing mast...
The Chesepeake Bay, Delaware Bay, Barnegat Bay, Long Island Sound, and Buzzard's Bay, among others, are all part of the ICW. There's obviously plenty of space...
Hi, Canal boats, house boats and paddle steamers probably about? Doug Mike Crawford <jmichael@...> wrote: The Chesepeake Bay, Delaware Bay, Barnegat Bay,...
Bimini (Bahamas) is less than 50 miles away from the Port of Miami - I believe a Harry proa to have the best market appeal for Bahamas crusing due to the...
Ah, I take your point. So the relative force on the mast due to sail size is largely irrelevant. So we will gain strength due to the shorter masts, but weight...
You will have to choose your fudge factors for sail force. It isn't just load to capsize..... I am not an expert but a really long discussion can be found...
JT, That is a very interesting and long thread. I have only read the first two pages, but one thing strikes me - that nearly all of the problems in design...
I believe that boat motion will be transferred to the mast in either case, whether it is stayed or freestanding. After all, if the boat heels 20 degrees due...
Hi Mike, I understand the part below about the compressive stress on the boat due to lack of shrouds, but the other two (torsional and point load stress) kind...
I agree with Mike about the dynamic loads of a capsizing wind gust being significantly greaterr than the steady state wind needed for capsize. The wind has to...
Chris, You're entirely right. Those loads will definitely be transmitted through the boat, and the structure will have to be designed to handle them....
Question for Rob,..... Cause I know hew loves the epoxy.... How is the mast held in place and what takes the load. Looking at the design 1500lb wind load or ...
