Mastlength and masthead for spinnaker - Wharram Builders and Friends2024-03-29T05:47:54Zhttp://wharrambuilders.ning.com/forum/topics/mastlength-and-masthead-for-spinnaker?xg_source=activity&feed=yes&xn_auth=noHi Kim
I am just making an a…tag:wharrambuilders.ning.com,2019-05-09:2195841:Comment:1670362019-05-09T05:44:51.536ZGeorge Woodwardhttp://wharrambuilders.ning.com/profile/GeorgeWoodward
<p>Hi Kim</p>
<p>I am just making an al. mast for my 21 and i am planning to follow your advice on a sleeve joint and masthead crane. And many thanks for the information.</p>
<p>The sleeve drawing shows staggered small holes . What is their purpose? Express adhesive perhaps? And how did you close off the top of the mast? (I have a 21 in Turkey but can't remember/ don't have a photo to help</p>
<p>Regards George<br></br> <br></br> <cite>Johan van Zwienen said:…</cite></p>
<p>Hi Kim</p>
<p>I am just making an al. mast for my 21 and i am planning to follow your advice on a sleeve joint and masthead crane. And many thanks for the information.</p>
<p>The sleeve drawing shows staggered small holes . What is their purpose? Express adhesive perhaps? And how did you close off the top of the mast? (I have a 21 in Turkey but can't remember/ don't have a photo to help</p>
<p>Regards George<br/> <br/> <cite>Johan van Zwienen said:</cite></p>
<blockquote cite="http://wharrambuilders.ning.com/forum/topics/mastlength-and-masthead-for-spinnaker?commentId=2195841%3AComment%3A130302#2195841Comment130239"><div><div class="xg_user_generated">Hi Kim, thnx for the reply, clear, nice pics , good explanation.way?<br/> <br/> <cite>kim whitmyre said:</cite><blockquote cite="http://wharrambuilders.ning.com/forum/topics/mastlength-and-masthead-for-spinnaker?commentId=2195841%3AComment%3A130302&xg_source=msg_com_forum#2195841Comment130302"><div><div class="xg_user_generated"><p>Johan, no such tapering is necessary (or possible!) for the inner pipe/sleeve. Here is a picture that will clarify:</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/1930102402?profile=original"><img width="721" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/1930102402?profile=RESIZE_1024x1024"/></a>You cut a slot in the sleeve that is wide enough to allow its compression to fit into the inner diameter of the mast. In the picture above, I was doing a test fitting of the sleeve into the mast pipe. The large "hose" clamps were more than strong enough to compress the sleeve.</p>
<p>Rivets or screws are used to fix the sleeve, yes.</p>
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</blockquote> Bonjour,
When you add a secon…tag:wharrambuilders.ning.com,2016-10-07:2195841:Comment:1458442016-10-07T14:39:07.368ZÉric Bouvéronhttp://wharrambuilders.ning.com/profile/Bouveron
Bonjour,<br/>
When you add a second halyard for a spi or gennaker, you have to put your rigging cleats between the two semicircles, or the forestay will be misplaced, since it is the lower semicircle which received the jib halyard?
Bonjour,<br/>
When you add a second halyard for a spi or gennaker, you have to put your rigging cleats between the two semicircles, or the forestay will be misplaced, since it is the lower semicircle which received the jib halyard? Thanks for the remark.
... i…tag:wharrambuilders.ning.com,2016-10-07:2195841:Comment:1458432016-10-07T08:38:23.802Zagur paesüldhttp://wharrambuilders.ning.com/profile/agurpaesueld
<p>Thanks for the remark.</p>
<p>... i think I will try to find a hefty sheaves with case to install instead of semicircles to avoid scuff.</p>
<p>Thanks for the remark.</p>
<p>... i think I will try to find a hefty sheaves with case to install instead of semicircles to avoid scuff.</p> Yes, we did coat the inserts…tag:wharrambuilders.ning.com,2016-10-06:2195841:Comment:1458322016-10-06T17:18:28.042ZPius Bielowskihttp://wharrambuilders.ning.com/profile/PiusBielowski
<p>Yes, we did coat the inserts with epoxy. In the first three season the fit of the inserts was very tight. As I said before we hardly got it plugged together. Therefore we did not glue or screw them in the tube. This spring we noticed that we can rotate them a little bit. So they obviously contracted. I think it is no big issue since the whole mast is compressed by the stay and shrouds.</p>
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<p>By the way the next time I would put some fiberglass on the semicircles were jib and…</p>
<p>Yes, we did coat the inserts with epoxy. In the first three season the fit of the inserts was very tight. As I said before we hardly got it plugged together. Therefore we did not glue or screw them in the tube. This spring we noticed that we can rotate them a little bit. So they obviously contracted. I think it is no big issue since the whole mast is compressed by the stay and shrouds.</p>
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<p>By the way the next time I would put some fiberglass on the semicircles were jib and gennaker halyard run. With time they cut grooves in the wood and the halyard can get caught in there. </p>
<p>Fair winds</p>
<p>Pius</p> Pius, I like your solution, a…tag:wharrambuilders.ning.com,2016-10-06:2195841:Comment:1459152016-10-06T07:16:14.593Zagur paesüldhttp://wharrambuilders.ning.com/profile/agurpaesueld
<p>Pius, I like your solution, as I have intention to go for gennaker as well for my Itatae. But tell me, did you epoxy coated the wood as well, before inserting it into the tube? If not, did you noticed any expansion/contraction of the wood due moisture?</p>
<p>Pius, I like your solution, as I have intention to go for gennaker as well for my Itatae. But tell me, did you epoxy coated the wood as well, before inserting it into the tube? If not, did you noticed any expansion/contraction of the wood due moisture?</p> Done.tag:wharrambuilders.ning.com,2015-07-06:2195841:Comment:1320692015-07-06T20:12:35.100ZJohan van Zwienenhttp://wharrambuilders.ning.com/profile/JohanvanZwienen
Done.
Done. Concerning the shrouds and fo…tag:wharrambuilders.ning.com,2015-06-19:2195841:Comment:1311232015-06-19T15:01:19.355ZPius Bielowskihttp://wharrambuilders.ning.com/profile/PiusBielowski
<p>Concerning the shrouds and forestay I can say the folowing: our mast is 7 m long and I did a lot of calculation to get the right length of the wires. Somehow I got it wrong and the shrouds were too long. So we shortened them. Now our lashings are rather long but this is no problem. The next time I would step the mast with any makeshift rope instead of the stays and measure them. And I would go for dyneema lines in place of stainless steel. </p>
<p>Concerning the shrouds and forestay I can say the folowing: our mast is 7 m long and I did a lot of calculation to get the right length of the wires. Somehow I got it wrong and the shrouds were too long. So we shortened them. Now our lashings are rather long but this is no problem. The next time I would step the mast with any makeshift rope instead of the stays and measure them. And I would go for dyneema lines in place of stainless steel. </p> If you have found a 6m tube,…tag:wharrambuilders.ning.com,2015-06-19:2195841:Comment:1310442015-06-19T08:08:59.898ZIan Bamseyhttp://wharrambuilders.ning.com/profile/IanBamsey
<p>If you have found a 6m tube, you can make up the 50cm with wood/ply epoxy fabricated inserts for the foot and crane sections. This might be easier than adding more aluminium.</p>
<p>If you have found a 6m tube, you can make up the 50cm with wood/ply epoxy fabricated inserts for the foot and crane sections. This might be easier than adding more aluminium.</p> I finaly found an aluminum tu…tag:wharrambuilders.ning.com,2015-06-18:2195841:Comment:1308822015-06-18T21:12:35.663ZJohan van Zwienenhttp://wharrambuilders.ning.com/profile/JohanvanZwienen
I finaly found an aluminum tube of 100 mm wall thickness 3 mm I'm thinking of adding about 50 cm. to get to a length of 650 Cm. Question : should I put longer stays or can I just put longer good quality cords to attach to the boat?
I finaly found an aluminum tube of 100 mm wall thickness 3 mm I'm thinking of adding about 50 cm. to get to a length of 650 Cm. Question : should I put longer stays or can I just put longer good quality cords to attach to the boat? I built my mast using a 6m al…tag:wharrambuilders.ning.com,2015-05-17:2195841:Comment:1303122015-05-17T19:39:25.239ZIan Bamseyhttp://wharrambuilders.ning.com/profile/IanBamsey
<p>I built my mast using a 6m alloy tube and wooden end pieces as suggested. If you follow this design, you can use heat gun glue to stick in the wooden ends. If they are not too tight a fit, glue them in and if you need to remove them a hot air gun will do the trick.</p>
<p>Ian</p>
<p>I built my mast using a 6m alloy tube and wooden end pieces as suggested. If you follow this design, you can use heat gun glue to stick in the wooden ends. If they are not too tight a fit, glue them in and if you need to remove them a hot air gun will do the trick.</p>
<p>Ian</p>