J24 (Sail No. 4239) Dartmouth |
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So, just how important is a Boats PY yardstick? |
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iGRF
Really should get out more Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6496 |
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Topic: So, just how important is a Boats PY yardstick? Posted: 04 Nov 19 at 4:24pm |
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I shed brain cells posting here.. I was a genius when I first came here.. now look at me. |
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3406 |
Post Options Quote Reply Posted: 04 Nov 19 at 4:37pm | |
A lot of creative geniuses were misunderstood.
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Robert
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Sam.Spoons
Really should get out more Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3398 |
Post Options Quote Reply Posted: 04 Nov 19 at 5:00pm | |
Sorry, I don't understand?
Edited by Sam.Spoons - 04 Nov 19 at 5:01pm |
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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish" |
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3406 |
Post Options Quote Reply Posted: 04 Nov 19 at 5:12pm | |
Look at the problems inventor of submarine had Admiralty tried there best to convince him they had plenty of ships that could sink
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Robert
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fab100
Really should get out more Joined: 15 Mar 11 Online Status: Offline Posts: 1005 |
Post Options Quote Reply Posted: 04 Nov 19 at 6:59pm | |
Yes. And the "greater the skin thickness the wider/longer the (one-design) boat" theory. Both funnier than anything they allow on the telly these days
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tink
Really should get out more Joined: 23 Jan 16 Location: North Hants Online Status: Offline Posts: 788 |
Post Options Quote Reply Posted: 04 Nov 19 at 7:09pm | |
Your not alone: there was guy that got a university grant and wrote a paper saying that black moths are faster, he proved something like a boat length a mile. Black absorbs more heat and there is less aero drag from the air flowing over a hot body. (He might have been a genius, convincing someone to pay him to sail everyday) Somewhere (think this video) Paul Goodison talks about changing the roughness of foils in different temperatures of sea water I had a book from the 70 / 80s with the top tip always buying a white boat because the white pigment is lighter than colours, especially black- unless it is a moth of course. |
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Tink
https://tinkboats.com http://proasail.blogspot.com |
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3406 |
Post Options Quote Reply Posted: 04 Nov 19 at 7:43pm | |
Tink, everyone knows, RED boats are fast boats.
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Robert
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Oatsandbeans
Far too distracted from work Joined: 19 Sep 05 Location: United Kingdom Online Status: Offline Posts: 382 |
Post Options Quote Reply Posted: 04 Nov 19 at 8:20pm | |
The thing is that white pigment is not lighter than other colours.White gel coat is loaded with a lots of titanium dioxide which is heavy (sg 4.2) where as carbon’s sg is 1.8-2.0, and you don’t need much carbon to get it black ( surprisingly you also throw in a bit of white to get opacity) so another urban myth put to rest.
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CT249
Far too distracted from work Joined: 08 Jul 06 Online Status: Offline Posts: 399 |
Post Options Quote Reply Posted: 04 Nov 19 at 9:39pm | |
The Great Lakes has a huge offshore racing scene, with races of 200-500 miles that get up to 300+ starters and IMS was the main rating rule for some time. The IMS system was largely funded by Pat Haggerty, who based his sailing on the Great Lakes. The IMS and IOR rules required measurers to specify whether the boat was measured on salt or fresh water. The fact that they went to that sort of length and still couldn't find a magic accurate rating rule shows how unlikely it is that a really accurating dinghy rule could be developed.
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Rupert
Really should get out more Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
Post Options Quote Reply Posted: 04 Nov 19 at 10:41pm | |
Thank you Chris - something new every day!
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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