Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-08-2015, 11:39   #61
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Harlingen, The Netherlands
Boat: Woods Mira 35 Catamaran
Posts: 513
Re: Does anyone know of a good quick system to dump the main with a double mainsheet

At last, the new mainsheet system.
Installed it today at anchor.
Will test sail tommorow.
Attached Thumbnails
Click image for larger version

Name:	1438709812979.jpg
Views:	64
Size:	61.7 KB
ID:	106705   Click image for larger version

Name:	1438709823053.jpg
Views:	62
Size:	70.4 KB
ID:	106706  

__________________

Franziska is offline   Reply With Quote
Old 04-08-2015, 13:57   #62
Registered User

Join Date: Aug 2012
Posts: 811
Re: Does anyone know of a good quick system to dump the main with a double mainsheet

Reading David Lewis books I learned that with his cat Rehu Moana (I think it was) when he was running in strong winds he would pull his jib in tight with both sheets so it was in line with the mast. Then when the main which was out to one side started to turn the boat the wind would push on the tight flattened jib and like a weather vane keep the boat straight. I sometimes do that in my mono and it certainly works, though not in the gales he sailed in. He developed the idea and had made a flat heavyweight triangular head sail set forward ( not hanked on ) but across the boat rather than in line. With that and at times no main his boat would happily self steer down wind.
Dr David Lewis wrote quite a few books that I can recommend. Children of Three Oceans was one of his first. Ice Bird was a later one describing his solo circumnavigation of Antarctica.
I had the pleasure of meeting him when at age 90 he was making wooden masts for his last boat and adventure.
__________________

__________________
GrahamHO is offline   Reply With Quote
Old 05-08-2015, 08:17   #63
Senior Cruiser
 
mikereed100's Avatar

Cruisers Forum Supporter

Join Date: Dec 2005
Location: Santa Barbara
Boat: 46' custom cat
Posts: 1,573
Images: 2
Re: Does anyone know of a good quick system to dump the main with a double mainsheet

Quote:
Originally Posted by Franziska View Post
At last, the new mainsheet system.
Installed it today at anchor.
Will test sail tommorow.
That looks great Franziska, and is very similar to the system we use. If I might make one suggestion? Your sheets make an approximately 120 degree bend at the blocks at the base of the mast which will load them very heavily. You could split the load between the blocks at the base of the mast and the blocks at the forward end of the boom by moving the latter as close to the mast as possible, creating a roughly 90 degree sheet angle at both sets of blocks.

Another issue you may or may not have is that by using fiddle blocks in a 4 part system with the becketed block at the boom, the base of the upper blocks will tilt forward under tension, causing the sheet to rub on the splice on the becket, creating friction. You can eliminate this by swapping the blocks, putting the becketed blocks on deck and the non-becketed blocks on the boom with a single block just forward of the fiddle block on the boom. This would give you a 5 part system and eliminate the 'block tilt' and chafe issue.
__________________
Mike

www.sailblogs.com/member/rumdoxy

Come to the dark side. We have cookies.
mikereed100 is offline   Reply With Quote
Old 05-08-2015, 10:48   #64
Sponsoring Vendor
 
Schooner Chandlery's Avatar

Community Sponsor

Join Date: Jan 2007
Location: home port Washington DC
Boat: SS Crocker design #131
Posts: 977
Re: Does anyone know of a good quick system to dump the main with a double mainsheet

Quote:
Originally Posted by GrahamHO View Post
Reading David Lewis books I learned that with his cat Rehu Moana (I think it was) when he was running in strong winds he would pull his jib in tight with both sheets so it was in line with the mast. Then when the main which was out to one side started to turn the boat the wind would push on the tight flattened jib and like a weather vane keep the boat straight. I sometimes do that in my mono and it certainly works, though not in the gales he sailed in. He developed the idea and had made a flat heavyweight triangular head sail set forward ( not hanked on ) but across the boat rather than in line. With that and at times no main his boat would happily self steer down wind.
Dr David Lewis wrote quite a few books that I can recommend. Children of Three Oceans was one of his first. Ice Bird was a later one describing his solo circumnavigation of Antarctica.
I had the pleasure of meeting him when at age 90 he was making wooden masts for his last boat and adventure.
Ah--what you're talking about does work. We've often sailed downwind with tight sheeted staysail and with our foresail (monohull / schooner rig) set to the wind. It works well in high winds. For less winds, we put up the jib and do the same with it.
__________________
"The only noble thing a man can do with money is to build a schooner." Robert Louis Stevenson

Schooner Chandlery is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can I dump the dump load? wiekeith Electrical: Batteries, Generators & Solar 15 13-10-2016 18:20
Does Anyone Know Any Good Children's Sailing Books ? Drifter33 The Library 36 04-06-2015 03:39
Best system to do most of wind/solar/alternator/shore to house/starting/dump + more bene505 Electrical: Batteries, Generators & Solar 19 19-05-2014 08:46
Double Mainsheet vs Traveler mikereed100 Multihull Sailboats 20 10-03-2013 13:30
For Sale: Mainsheet Traveler, Jib Sheet Tracks, Double Rope Clutch, Adjustable Bracket pressuredrop Classifieds Archive 5 02-07-2010 13:15



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:19.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.