J24 (Sail No. 4239) Dartmouth |
Laurent Giles 'Jolly Boat' Exeter |
29er GBR 074 Tynemouth |
List classes of boat for sale |
Debunking Dodgy Sailing Theories |
Post Reply | Page <1 56789> |
Author | ||
JohnW
Really should get out more Joined: 17 Jul 07 Location: United Kingdom Online Status: Offline Posts: 552 |
Post Options
Quote Reply
Topic: Debunking Dodgy Sailing Theories Posted: 21 Oct 11 at 11:32am |
|
No, not always the "best" way. Agree wide in tight out has tactical advantages, but in the absence of other nearby boats an apex turn is faster by around a boat length (which in my book is generally better when racing). The myth is that being further "upwind" is better, in reality the apex turn puts you ahead of where you would have been if you had done the "racing turn". You may be slightly to leeward of the exit line from the mark, but because you sailed a shorter distance you are in fact ahead by about a boat length. |
||
I luv Wight
Really should get out more Joined: 28 Jan 05 Location: United Kingdom Online Status: Offline Posts: 628 |
Post Options Quote Reply Posted: 21 Oct 11 at 11:23am | |
What is planing? and how do you define it?
|
||
2547
Really should get out more Joined: 11 Aug 11 Online Status: Offline Posts: 1151 |
Post Options Quote Reply Posted: 21 Oct 11 at 11:08am | |
Ah ... that would be a great idea ... then it would slap up & down on the chop to slow you down whilst the cats go creaming past ... |
||
fudheid
Far too distracted from work Joined: 21 Apr 11 Location: 51.53 N 01.28 E Online Status: Offline Posts: 241 |
Post Options Quote Reply Posted: 21 Oct 11 at 11:03am | |
not the fastest but the best way, inside track upwind.....
|
||
JohnW
Really should get out more Joined: 17 Jul 07 Location: United Kingdom Online Status: Offline Posts: 552 |
Post Options Quote Reply Posted: 21 Oct 11 at 10:51am | |
How about this old chestnut:
"the fastest way to round the leeward mark is 'wide in tight out' " |
||
fudheid
Far too distracted from work Joined: 21 Apr 11 Location: 51.53 N 01.28 E Online Status: Offline Posts: 241 |
Post Options Quote Reply Posted: 21 Oct 11 at 10:41am | |
this is an all time favourite of old dudes on 4ksbs
|
||
JohnW
Really should get out more Joined: 17 Jul 07 Location: United Kingdom Online Status: Offline Posts: 552 |
Post Options Quote Reply Posted: 21 Oct 11 at 10:39am | |
I think if you do the vector maths, the twist required would be less when you have a large apparent wind component which is probably why cats such as the ACs dont appear to need much twist in their wings. (EDIT: Im not a cat sailor, nor have I sailed with a wing sail - just considering the mathematical point of view which as we all know is often not as simple as we think).
Edited by JohnW - 21 Oct 11 at 10:42am |
||
rogue
Really should get out more Joined: 04 Dec 08 Location: United Kingdom Online Status: Offline Posts: 978 |
Post Options Quote Reply Posted: 21 Oct 11 at 9:47am | |
Seamonkey- it's a cat, it doesn't count, cats are not tactical, they are in GRF's words, "gehey"
of course, if you close the bow up and form the hull from one piece of plastic, then you get a tunnel-hulled scow... these of course are really cool. Edited by rogue - 21 Oct 11 at 9:48am |
||
2547
Really should get out more Joined: 11 Aug 11 Online Status: Offline Posts: 1151 |
Post Options Quote Reply Posted: 21 Oct 11 at 9:22am | |
yeah ... after no doubt millions spend researching the matter look how heavily twisted they are running ... |
||
RS400atC
Really should get out more Joined: 04 Dec 08 Online Status: Offline Posts: 3011 |
Post Options Quote Reply Posted: 21 Oct 11 at 8:19am | |
Only in your world! In the real world, we can measure the different windspeed (and direction) as a function of height. Its significance can vary, but sometimes you want a lot of twist for this reason. Or were you taking the view that old wives sometimes knew a thing or two? |
||
Post Reply | Page <1 56789> |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |