Best simple(tons) sail trim guide.

pcatterall

Well-known member
Joined
2 Aug 2004
Messages
5,452
Location
Home East Lancashire boat Spain
Visit site
Something to take on the boat so that when we are sailing we can refer to it and improve our 'trimming techniques' as we go.
Some nice simple diagrams would be great!!

I often see articles in magazines but being old and simple can make much better sense of what I read when I am in a real hands on situation It also has some chance of sticking in my brain if I read it and do it straight away.

Recommendations please!!
 

sarabande

Well-known member
Joined
6 May 2005
Messages
36,050
Visit site
Last edited:

lustyd

Well-known member
Joined
27 Jul 2010
Messages
12,424
Visit site
Sail trim is easy. Loosen each rope in turn and see if you go faster. If not, tighten them. If still not faster then it was the wrong rope or you were going top speed :D
 

knuterikt

Active member
Joined
11 Sep 2006
Messages
1,624
Location
Oslo, Norway
Visit site
Something to take on the boat so that when we are sailing we can refer to it and improve our 'trimming techniques' as we go.
Some nice simple diagrams would be great!!

I often see articles in magazines but being old and simple can make much better sense of what I read when I am in a real hands on situation It also has some chance of sticking in my brain if I read it and do it straight away.

Recommendations please!!

I like this book (have the Norwegian version) http://www.dedekam.com/sailtrim.html
 

Poecheng

Well-known member
Joined
16 Aug 2013
Messages
2,221
Location
East Coast
Visit site
There was a fairly long thread a month or so back on sail trim. If I could transplant everything Javelin said into my head I would be a happy man (no disrespect to the others who posted) Worth searching out !
 

Javelin

Well-known member
Joined
3 Sep 2010
Messages
1,413
Location
Southwold
www.Southwoldboatyard.co.uk
The issue is that the books, RYA, North and the like have to generalise so much that its hard to get much help for you and your specific boat or in some cases they pick a boat /rig and cover that but if your rig is not the same, again its hard to use it for you own aims.

Most Class associations usually have a crib sheet or at least a guru that'll help.

If your class is one of the hundreds that don't have that then you need to make your own by picking the brains and getting it written down in a little black book which you can then lose.
Split it into three Chapters, Upwind, Reaching and Downwind.
Spit each chapter into three, Light, Medium and Heavy winds.
I've got one for all the boats I've sailed on for any length of time and find them invaluable to refer back to especially when things just don't feel right.

Pick one you want to work on first and we'll work it out, there's plenty of contributors on here not to mention numerous editors.

We just need to know what boat it is and the type of rig, mast furling main, conventional, fully battened or better still a recent-ish photo with your sails up.
 
Last edited:

William_H

Well-known member
Joined
28 Jul 2003
Messages
14,003
Location
West Australia
Visit site
Well I reckon to simplify it is working up wind that is most problematic and makes most difference. It is the jib that matters most.
2 things for the jib are the sheeting point ie cars on the tracks next to the cabin. Forward for lighter winds but forward for any rolls in the furler or smaller jibs.
Jib sheet tension. Generally really tight.
Check the sheeting point by luffing and watch from tell tales if it is the top or bottom luffing first. Top luffs first sheeting is too far aft. Bottom luffs first sheeting is too far forward. Get em equal. olewill
 

DJE

Well-known member
Joined
21 Jun 2004
Messages
7,666
Location
Fareham
www.casl.uk.com
Something to take on the boat so that when we are sailing we can refer to it and improve our 'trimming techniques' as we go.
Some nice simple diagrams would be great!!

I often see articles in magazines but being old and simple can make much better sense of what I read when I am in a real hands on situation It also has some chance of sticking in my brain if I read it and do it straight away.

Recommendations please!!

Basic guide from Kemp Sails is here:-

http://www.kempsails.com/technical-data/17-trimming-mainsails-headsails/file.html
 

jwilson

Well-known member
Joined
22 Jul 2006
Messages
6,111
Visit site
Well I reckon to simplify it is working up wind that is most problematic and makes most difference. It is the jib that matters most.
2 things for the jib are the sheeting point ie cars on the tracks next to the cabin. Forward for lighter winds but forward for any rolls in the furler or smaller jibs.
Jib sheet tension. Generally really tight.
Check the sheeting point by luffing and watch from tell tales if it is the top or bottom luffing first. Top luffs first sheeting is too far aft. Bottom luffs first sheeting is too far forward. Get em equal. olewill

Much of what you find on a modern racing boat (or even most older ones) are not that applicable to a heavy long-keel cruising ketch with non-bendy masts and probably a fixed three blade prop. I agree jib/genoa trim is the first thing to concentrate on, get some telltales on the headsail, and use them to set sheeting angles. Then the same with mainsail leech telltales. The mizzen is almost irrelevant to windward, on some ketches it even slows you down!

Don't expect to point too high: use a GPS with a waypoint set 20 miles dead to windward to see what pointing angle actually gets best VMG to waypoint. You may be surprised at how far away from pointing-as-high-as-you-can works best for actually getting to windward.
 

Daydream believer

Well-known member
Joined
6 Oct 2012
Messages
21,071
Location
Southminster, essex
Visit site
Get a place on a decent racing yacht, on the basis that you'd like to learn. You will.

A lot of non racers will reject that comment out of hand but really it is the best advice whatever you sail
It is not only all about trim but general handling as well. Understanding conditions & when to pinch & when to go off a bit to get way on in a chop for example. Or when to tack down wind etc
But if you have a cr..py old set of sails that you just stick up & ram on outhaul & uphaul tension etc you will not get far
There are loads of books on sail trim but actually seeing what is right is far better.
Make sure your log is calibrated correctly so you can notice small changes in speed is useful as well
 
Top