{"id":10673,"date":"2010-03-19T02:48:30","date_gmt":"2010-03-19T07:48:30","guid":{"rendered":"https:\/\/setsail.com\/prop-parameters\/"},"modified":"2010-03-21T20:41:37","modified_gmt":"2010-03-22T01:41:37","slug":"prop-parameters","status":"publish","type":"post","link":"https:\/\/setsail.com\/prop-parameters\/","title":{"rendered":"Prop Parameters"},"content":{"rendered":"<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" height=\"576\" alt=\"FPB64-1-Sea-Trials-313-2\" src=\"https:\/\/setsail.com\/wp-content\/uploads\/2010\/03\/fpb64-1-sea-trials-313-2.jpg\" width=\"447\" \/><\/p>\n<p>There are numerous propeller variables in displacement yacht design. Given the restrictions of draft, and the massive drag to be overcome with most ocean crossing yachts, props are forced into a predictable pattern.<\/p>\n<p>However, the efficiency of the FPB, and the low cruise power needs, allow a variety of options.<\/p>\n<p><!--more--><\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" height=\"576\" alt=\"FPB64-1-Sea-Trials-319\" src=\"https:\/\/setsail.com\/wp-content\/uploads\/2010\/03\/fpb64-1-sea-trials-319.jpg\" width=\"459\" \/><\/p>\n<p>In our case we are using a three bladed wheel with relatively small blade area. This allows high aspect ratio blades which are very efficient. However, with fewer blades you have a tendency toward vibration and prop noise. This is not a problem for the FPB (she is proving to be almost silent and there is no vibration) because of the following factors:<\/p>\n<ul>\n<li>Extra propeller tip clearance from the hull.<\/li>\n<li>2.5&#8243;\/62mm prop shaft (way oversized).<\/li>\n<li>Extra heavy hull plating (12mm.15\/32&#8243;)<\/li>\n<li>Careful engineering of bearings and alignment.<\/li>\n<li>Low power requirements at cruise.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>There are numerous propeller variables in displacement yacht design. Given the restrictions of draft, and the massive drag to be <a class=\"read-more\" href=\"https:\/\/setsail.com\/prop-parameters\/\">&#8230;Read More<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52],"tags":[],"class_list":["post-10673","post","type-post","status-publish","format-standard","hentry","category-fpb-64-sea-trials"],"_links":{"self":[{"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/posts\/10673"}],"collection":[{"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/comments?post=10673"}],"version-history":[{"count":0,"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/posts\/10673\/revisions"}],"wp:attachment":[{"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/media?parent=10673"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/categories?post=10673"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/setsail.com\/wp-json\/wp\/v2\/tags?post=10673"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}