开云体育

?Thanks for your throughts about the KD 860 after your very negative end statement of your last letter. Multihulls are load sensitive of course, because ascelleration in a squall is there only devence. The KD 860

is here no exeption. But the boat is extreme stable by design. See the dynamic stability calculation which is extrem conservative. Because I calculate with a safety factor of + 90%!!!!! I add the dynamic stability diagram. When you look at this interesting facts are obviouse. The maximum rigthing moment is 5400kg with the sail area of 37m2. At an angle of 55 degree(windforce 30 knots full sail) ?there is a recovery hump with an righting moment of still 1300kg, which gives you time to release the mainsheet and bear away. As a small reminder, never luff a multihull in such an situation, the rotational added moment ( weigth of the rigg) would turm the boat over. Nobody in his right mind would sail in a wind of 30 knots with full sail, also a small sail as this of the KD 870. It is per design no racing boat. This is reflected as you observed with the low apect ratio of the hulls which is in this case 1 : 8. Normally I design not under 1 : 12. Here we have also the reason the boat has a good load factor. Which makes the boat cabable for longer yournay.?

About 17 % of my clients are members of these group. Logical it is an English language group. I have clients in Swasiland the can read drawings but not the language. My Japanese friends have the same problem. 7?

KD 860 are used as life on board boats because of the relative high load factor.. Some solo, others as couble, All of them made long passages without any problem. Two are now sailing around the world. I get sometimes a letter, because the are not interested in the Internet, the are happy to be away from just this part of or sillivication (no mistake). Speed, as mentioned it is no racer, the report etmals of 180 to 200 miles. This is a medium speed of 7 knots. Our Pelican was very fast and 16 knots was not unusual. But lucky we have a brake on multis, shorten sail. Above 11 knots any cutlery starts to rattle. When I, or my wife where cooking, we slowed the boat alwise down. In conversations with other sailes, the where done the same. A time ago I was reading an article in french "Multoque". The where sailing a "Tectron" from Canada to France. When cooking the did the same. Racing is a differnt story, I know in the days of the first multihull races. The had a lot of cakes on board for food. Nothing to cook and sufficient calories for the hard work. I will go into the load capacity and what to have on boart (anchor etc) in my answer to H.M.

Thanks for your througths, which is at least more, as your statement in your last letter that the KD 860 is not suitable.

Bernd

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