Jachtem Przez Świat
  • O NAS
    • Jachtem przez Świat – Nasza Rodzina
    • Jachtem przez Świat – Nasz Dom na Wodzie
    • Nasza Historia
    • Jachtem przez Świat – Życie na wodzie
    • Gdzie Jesteśmy
  • VLOGI
    • Życie na wodzie
      • Życie na wodzie

        Ciasto bananowe – proste i pyszne!

        2022-02-23

        Życie na wodzie

        Blok kokosowo-czekoladowy

        2021-03-29

        Życie na wodzie

        Odwiedzamy karaibską szkołę. Czy rozbiłem kiedyś samolot ?

        2021-02-11

        Życie na wodzie

        KARAIBSKA WYSPA CZEKOLADY I PRZYPRAW. Wycieczka po Grenadzie

        2020-11-25

        Życie na wodzie

        Jak zmieniliśmy swoje życie i postanowiliśmy żyć po…

        2020-11-23

      • Przepisy z Karaibów
  • Wczasy na Poly
  • Karaibski Butik
  • POLY poleca
  • Media o nas
  • WSPIERAJ NASZĄ TWÓRCZOŚĆ
  • Kontakt
Jachtem przez świat
Sobotni chill & wyprzedaż z pokładu POLY
Jachtem przez Świat podczas PolBoat Festival w Gdyni
Rejs przez Atlantyk 2022 Teneryfa – Cabo Verde...
Rejsy po Karaibach – 2022/2023
Wyróżnienie za 6 letni rejs i aktywne propagowanie...
Super Kolos dla naszej kochanej Asi Pajkowskiej!
Zostaliśmy nominowani do nagrody KOLOSY 2021
Od 6 lat mieszkamy na wodzie! Dlaczego zmieniliśmy...
Poranne espresso w Dzień Dobry TVN
Uszkodzony ster! Dryfujemy do Cherbourga we Francji

Jachtem Przez Świat

  • O NAS
    • Jachtem przez Świat – Nasza Rodzina
    • Jachtem przez Świat – Nasz Dom na Wodzie
    • Nasza Historia
    • Jachtem przez Świat – Życie na wodzie
    • Gdzie Jesteśmy
  • VLOGI
    • Życie na wodzie
      • Życie na wodzie

        Ciasto bananowe – proste i pyszne!

        2022-02-23

        Życie na wodzie

        Blok kokosowo-czekoladowy

        2021-03-29

        Życie na wodzie

        Odwiedzamy karaibską szkołę. Czy rozbiłem kiedyś samolot ?

        2021-02-11

        Życie na wodzie

        KARAIBSKA WYSPA CZEKOLADY I PRZYPRAW. Wycieczka po Grenadzie

        2020-11-25

        Życie na wodzie

        Jak zmieniliśmy swoje życie i postanowiliśmy żyć po…

        2020-11-23

      • Przepisy z Karaibów
  • Wczasy na Poly
  • Karaibski Butik
  • POLY poleca
  • Media o nas
  • WSPIERAJ NASZĄ TWÓRCZOŚĆ
  • Kontakt
0
Sailing

Multihull Yacht Stability

Wersja Polska https://sailoceans.com/wywrotnosc-jachtow-wielokadlubowych/

We are sailing a Hobbie 18, perfectly stable while flying one hull at approximately 20 knots.

Not for the first time the question was asked about the stability of multi-hull yachts, i.e. catamarans and trimarans.

Let’s start with a very general statement that, if we exclude record-breaking, racing machines from this discussion, the chances of capsizing are negligible.
First of all, over 90% of mass-produced catamarans have a “fuse” incorporated into their design. This means that if you end up with too much sail area for a given wind, the rigging will fail and the mast with sails will have gone overboard (which of course I do not wish to anyone, but it is a much more desirable solution than capsizing the boat), before the force on the sails reaches a level that allows lifting windward hull out of the water. This applies to static conditions in flat water. Situations in which production catamarans have overturned involved the wind and waves so extreme that potentially even a monohull could capsize. Of course, the obvious con of any multihull in this case is that it will most likely remain upside down. Once again I would like to remind you that we are talking about extreme conditions, that are entirely avoidable if you couple a decent forecast with a reasonably fast multihull. Most cruising monohull yachts are too slow to effectively position themselves to the weather systems, so they are rather and hopefully build to withstand harsh conditions and endure them rather then escape them as in the case of fast multis.
With trimaran the situation is similar to catamaran, except that the force needed to raise two hulls is significantly greater than that required to fly one hull in a catamaran. It is even more so since one of those hulls is the central one in which about 80% of the whole yacht’s weight is concentrated. Hence, one hull in a trimaran with enough dihedral flies relatively easily and safely, while the other two are much more stable at than a catamaran with both hulls in the water, because our other two hulls are now on the leeward side and the righting moment increases radically, while the weight of a windward ama (outer hull on a trimaran) airborne only adds even more to the righting moment. Of course, greater beam of the entire superstructure of a typical trimaran has a dramatic effect on the hull stability and increased righting moment.
To summarize, we often sail on two of the three hulls, but never on one. We sail fast enough to choose the weather we intend to be in. A few times we consciously chose forecast with winds above 50 knots, but only after positioning ourselves to the weather system so that we safely sailed at 7-12 knots on a bare mast on an autopilot in comfort and perfectly stable. Of course, I do not recommend conscious choice of such weather without adequate experience of the crew and equipment, which is not only suitable for this in terms of design, but also in terms of condition and preparation.

There is a niche group of production catamarans for enthusiasts such as Gunboat, Outremer, or Catana, which have purposely designed strong enough rigging and mast to allow safely to generate loads that allow to fly a hull. Remember, however, that even in this high performance regime any mutihull is far from the tipping point. The righting moment drastically increases in the multi-hull yacht up to 45 degrees of heel on average depending on the design and load distribution. Only when we insist on continuing to load the rigging past the peak of the righting moment curve and do not let go of the sails are we destined to capsize.
Again please keep in mind that this is a highly averaged out simplification and generalization applying to flat water conditions. With large waves on a beam this safety margin in terms of large righting moment to high heel angles drastically decreases. So don’t try this at home without proper instruction and practice.
Happy sailing!

Bartek

0 Komentarz
0
Facebook Twitter Google + Pinterest
Bartek

Poprzedni post
Wywrotność jachtów wielokadłubowych
Następny post
SPECIAL EPISODE: YOUTUBE discrimination of families with KIDS!

You may also like

Tornado, heavy rains, damaged sail and engine down...

2019-10-17

Welcome to our sailing HOME

2018-10-02

Sailing Bahamas – South America Day 6,7,8…

2018-06-15

Wywrotność jachtów wielokadłubowych

2019-10-17

How our life doesn’t differ a lot from...

2018-09-01

Broken tooth in the middle of the OCEAN...

2018-06-02

When a girl drives a dinghy

2018-04-02

Skomentuj Skasuj komentarz

Witryna wykorzystuje Akismet, aby ograniczyć spam. Dowiedz się więcej jak przetwarzane są dane komentarzy.

Promocje w butiku

  • Etui z żagla 100 % recycled POLY - żółty zł160,00 zł120,00

Polecamy z naszego butiku

  • Muzyka relaksacyjna na hungdrumie - odpoczynek, sen, joga, odprężenie, medytacja - 1 godzina - 432 Hz zł55,00
  • Jak kupić jacht? - konsultacje z Anią i Bartkiem zł550,00

wspieraj naszą twórczość

Jeżeli czujesz, że nasza twórczość jest dla Ciebie wartościowa i wnosi do Twojego odziennego życia radość to dołącz do nas i wesprzyj nasze działania.

Zapisz się na Newsletter

Zapisz się na nasz newsletter bądź na bieżąco z naszymi wydarzeniami, rejsami, lajfami, nową muzyką i medytacjami, etc.

obserwuj nas i bądź na bieżąco

Facebook Instagram Youtube

Obserwuj nas na facebook

SailOceans Family Life Unplugged

Newsletter z Karaibów

Zapisz się na nasz newsletter bądź na bieżąco z naszymi wydarzeniami, rejsami, lajfami, nową muzyką i medytacjami, etc.

  • Facebook
  • Instagram
  • Youtube

@2020 - SailOceans - Family life unplugged. All Right Reserved.

Polityka prywatności

Regulamin


Powrót na górę
Używamy plików cookie na naszej stronie internetowej, aby zapewnić Ci najbardziej odpowiednie wrażenia, zapamiętując Twoje preferencje i powtarzając wizyty. Klikając „Akceptuj”, wyrażasz zgodę na użycie plików cookie.
Akceptuję
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checkbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT