SD Dojavi Slobodna Dalmacija
stdClass Object ( [id] => 1173717 [title] => Pravila za odabir sidra: uz savjete našeg stručnog suradnika donosimo i tablicu s odnosima dužine konopa, kuta struka i nosivosti [alias] => pravila-za-odabir-sidra-savjeti-i-tablica [catid] => 418 [published] => 1 [introtext] => [fulltext] =>

Kupio sam polovnu jedrilicu Elan 333 (10,45 x 3,46 m) deplasmana 4800 kg i pripremam se za prvo krstarenje u kolovozu. Kako sam dosad imao malu poljsku jedrilicu od šest metara koju sam lako sidrio, a kupljena nema ni sidro ni lanac, želio bih nekoliko vaših savjeta o sidrenju ove veće. Koliko bi glavno sidro trebalo biti teško, koliki promjer lanca trebam kupiti i koliko metara, koliko lanca trebam otpustiti za sigurno sidrenje, koliko teško treba biti rezervno sidro i koji promjer konopa za njega kupiti? Bio bih zahvalan i za savjet o optimalnoj vrsti glavnog sidra.

Marko D., Zagreb

Pretpostavljam da na pramcu imate sidreno vitlo s ugrađenom krunom za sidreni lanac promjera 8 mm, što je i zakonska norma za toliko plovilo. Ako za sidrenje preferirate konop, tada ne smije biti tanji od 12 mm, ali konop većeg promjera bolje leži u ruci, lakše se slaže i manje se mrsi.

Propisana minimalna masa za glavno sidro vašeg plovila je 15, a za pomoćno 7 kg, što vrijedi za sidra povećane sile držanja, odnosno za sva moderna sidra s proširenim lopaticama. Tradicionalna sidra, kao što je kovani mačak, moraju biti 25 posto teža.

Promjer lanca za pomoćno sidro može biti 6 mm, a konopa 10 mm, dok dužina sidrenog konopa ili lanca, za oba sidra, ne smije biti manja od četiri dužine trupa. Udovoljavajući ovim normama, imate sve elemente za vrlo pouzdano sidrenje, velim pouzdano jer apsolutno sigurnog sidrenja nema.

Konop i lanac

Nosivost sidra ovisi o kutu između dna i podignutog struka sidra, a za sigurnije sidrenje taj kut ne bi trebao biti veći od 12 stupnjeva, što odgovara dužini konopa od približno pet dubina. Pod ovim kutom sidro podnosi približno 70 posto svojeg nominiranog opterećenja.

Lanac je dosta teži od konopa i zbog toga se ne nateže ravno, nego u luku, što pri dnu struku smanjuje kut, pa je za iste rezultate dovoljan upola kraći sidrenjak od lanaca. Dakle, često spominjane preporuke o otpuštanju pet do osam dubina konopa ili tri do četiri dubine lanca pretpostavljaju dosta dobru pouzdanost sidrenja.

Zadovoljavajući samo zakonsku normu od približno 45 metara dužine sidrenjaka, konopom se možete pouzdano sidriti na 9, a lancem na 15 metara dubine.

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Lanac treba imati promjer od 8 mm
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Odabrati sidrenjak od konopa ili lanca stvar je osobnog afiniteta. Lancem je sve možda malo komotnije jer sve radnje obavlja vinč, ali je dosta težak i nezgodan ako je sidro potrebno podizati na ruke. Konop je lakši, njime se lakše manipulira, lako ga je premjestiti s bitve na bitvu ili s pramca na krmu, lakše se slaže, jednostavno se nadovezuje, ali za sigurniji vez potrebno ga je dvostruko više.

Osobno preferiram kombinaciju, sidreni konop s nekoliko metara predlanca. Predlanac se postavlja kao dodatna težina sidru, amortizer kod vala i svojom težinom smanji kut struka. Dobro je da je predlanac težak barem koliko i sidro, a za sidra izrađena od aluminijskih legura i 60 posto teži od sidra.

Važno je dno

Preporučiti neku određenu vrstu sidra dosta je nezahvalno. Jedna su dobra za neku vrstu dna, druga za drugu i svaki tip sidra ima svojih prednosti i svojih mana. Logično je da ćete za glavno sidro, možda je bolji izraz radno, odabrati sidro za vrstu dna na kojima se najčešće sidrite.

Međutim, ozbiljni nautičari na brodu imaju tri sidra. Uz radno, koje najčešće koriste, imaju i dva pomoćna, lagano i teško. Ovo lagano obično je neka vrsta mačka koje obaraju za kratkoročno sidrenje za mirna vremena u zaštićenom sidrištu, a isto koriste i za sidrenje pomoćne brodice, dingyja.

Teže pomoćno sidro teže je i snažnije od radnoga i koristi se u ozbiljnijim situacijama, a često i kao drugo sidro u moru. Ako već imate više sidara, dobro je da su različitog tipa jer svako je dobro za drugu vrstu dna. Na sidrima ne štedite, uostalom, ona stara izreka vrijedi i danas: brod vrijedi onoliko koliko vrijedi sidro koje na sebi nosi.

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Tablica - dužina konopa, kut struka, nosivost
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Pitanja šaljite na more@slobodnadalmacija.hr.

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Čitajte sve o jedrenju, đitama po Jadranu, brodovima na struju, brodskim motorima i popravku broda. Učimo vas kako održavati brod. 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Kupio sam polovnu jedrilicu Elan 333 (10,45 x 3,46 m) deplasmana 4800 kg i pripremam se za prvo krstarenje u kolovozu. Kako sam dosad imao malu poljsku jedrilicu od šest metara koju sam lako sidrio, a kupljena nema ni sidro ni lanac, želio bih nekoliko vaših savjeta o sidrenju ove veće. Koliko bi glavno sidro trebalo biti teško, koliki promjer lanca trebam kupiti i koliko metara, koliko lanca trebam otpustiti za sigurno sidrenje, koliko teško treba biti rezervno sidro i koji promjer konopa za njega kupiti? Bio bih zahvalan i za savjet o optimalnoj vrsti glavnog sidra.

Marko D., Zagreb

Pretpostavljam da na pramcu imate sidreno vitlo s ugrađenom krunom za sidreni lanac promjera 8 mm, što je i zakonska norma za toliko plovilo. Ako za sidrenje preferirate konop, tada ne smije biti tanji od 12 mm, ali konop većeg promjera bolje leži u ruci, lakše se slaže i manje se mrsi.

Propisana minimalna masa za glavno sidro vašeg plovila je 15, a za pomoćno 7 kg, što vrijedi za sidra povećane sile držanja, odnosno za sva moderna sidra s proširenim lopaticama. Tradicionalna sidra, kao što je kovani mačak, moraju biti 25 posto teža.

Promjer lanca za pomoćno sidro može biti 6 mm, a konopa 10 mm, dok dužina sidrenog konopa ili lanca, za oba sidra, ne smije biti manja od četiri dužine trupa. Udovoljavajući ovim normama, imate sve elemente za vrlo pouzdano sidrenje, velim pouzdano jer apsolutno sigurnog sidrenja nema.

Konop i lanac

Nosivost sidra ovisi o kutu između dna i podignutog struka sidra, a za sigurnije sidrenje taj kut ne bi trebao biti veći od 12 stupnjeva, što odgovara dužini konopa od približno pet dubina. Pod ovim kutom sidro podnosi približno 70 posto svojeg nominiranog opterećenja.

Lanac je dosta teži od konopa i zbog toga se ne nateže ravno, nego u luku, što pri dnu struku smanjuje kut, pa je za iste rezultate dovoljan upola kraći sidrenjak od lanaca. Dakle, često spominjane preporuke o otpuštanju pet do osam dubina konopa ili tri do četiri dubine lanca pretpostavljaju dosta dobru pouzdanost sidrenja.

Zadovoljavajući samo zakonsku normu od približno 45 metara dužine sidrenjaka, konopom se možete pouzdano sidriti na 9, a lancem na 15 metara dubine.

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Lanac treba imati promjer od 8 mm
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Odabrati sidrenjak od konopa ili lanca stvar je osobnog afiniteta. Lancem je sve možda malo komotnije jer sve radnje obavlja vinč, ali je dosta težak i nezgodan ako je sidro potrebno podizati na ruke. Konop je lakši, njime se lakše manipulira, lako ga je premjestiti s bitve na bitvu ili s pramca na krmu, lakše se slaže, jednostavno se nadovezuje, ali za sigurniji vez potrebno ga je dvostruko više.

Osobno preferiram kombinaciju, sidreni konop s nekoliko metara predlanca. Predlanac se postavlja kao dodatna težina sidru, amortizer kod vala i svojom težinom smanji kut struka. Dobro je da je predlanac težak barem koliko i sidro, a za sidra izrađena od aluminijskih legura i 60 posto teži od sidra.

Važno je dno

Preporučiti neku određenu vrstu sidra dosta je nezahvalno. Jedna su dobra za neku vrstu dna, druga za drugu i svaki tip sidra ima svojih prednosti i svojih mana. Logično je da ćete za glavno sidro, možda je bolji izraz radno, odabrati sidro za vrstu dna na kojima se najčešće sidrite.

Međutim, ozbiljni nautičari na brodu imaju tri sidra. Uz radno, koje najčešće koriste, imaju i dva pomoćna, lagano i teško. Ovo lagano obično je neka vrsta mačka koje obaraju za kratkoročno sidrenje za mirna vremena u zaštićenom sidrištu, a isto koriste i za sidrenje pomoćne brodice, dingyja.

Teže pomoćno sidro teže je i snažnije od radnoga i koristi se u ozbiljnijim situacijama, a često i kao drugo sidro u moru. Ako već imate više sidara, dobro je da su različitog tipa jer svako je dobro za drugu vrstu dna. Na sidrima ne štedite, uostalom, ona stara izreka vrijedi i danas: brod vrijedi onoliko koliko vrijedi sidro koje na sebi nosi.

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Tablica - dužina konopa, kut struka, nosivost
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Pitanja šaljite na more@slobodnadalmacija.hr.

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Na brodu je pametno uvijek imati tri sidra

Lanac treba imati promjer od 8 mm

Tablica - dužina konopa, kut struka, nosivost
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Nautika

SIGURNOst na moruPravila za odabir sidra: uz savjete našeg stručnog suradnika donosimo i tablicu s odnosima dužine konopa, kuta struka i nosivosti

Piše Damir Višić, sudski vještak za nautiku
8. ožujka 2022. - 11:31
Na brodu je pametno uvijek imati tri sidra
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Na brodu je pametno uvijek imati tri sidra

Kupio sam polovnu jedrilicu Elan 333 (10,45 x 3,46 m) deplasmana 4800 kg i pripremam se za prvo krstarenje u kolovozu. Kako sam dosad imao malu poljsku jedrilicu od šest metara koju sam lako sidrio, a kupljena nema ni sidro ni lanac, želio bih nekoliko vaših savjeta o sidrenju ove veće. Koliko bi glavno sidro trebalo biti teško, koliki promjer lanca trebam kupiti i koliko metara, koliko lanca trebam otpustiti za sigurno sidrenje, koliko teško treba biti rezervno sidro i koji promjer konopa za njega kupiti? Bio bih zahvalan i za savjet o optimalnoj vrsti glavnog sidra.

Marko D., Zagreb

Pretpostavljam da na pramcu imate sidreno vitlo s ugrađenom krunom za sidreni lanac promjera 8 mm, što je i zakonska norma za toliko plovilo. Ako za sidrenje preferirate konop, tada ne smije biti...

#TEŽINA SIDRA#SIDRENJE BRODA#ELAN 333 SIDRO#KOJE SIDRO ODABRATI
18. svibanj 2024 19:27