Sail Plans - Dimensions and more info

  • April 10, 2011 9:52 AM
    Reply # 567780 on 564930
    W42/43 Tall Rig Yawl   Luff  Leech  Foot Area  Weight 
     Main  49  49.8  16.5  404  9.25
     Mizzen  21.5  22.75  7.7  83  8.25
     Staysail  36.5  31.5  12.75  206  8.25
     Yankee  55  47.5  25.5  603  7.25
     Genoa  55  53.75  31.5  845  6.5
     Reacher  55  49.75  31.66  745  3.8
     Drifter  37.5  52  35.33  906  2.2
     Genoa Staysail  45  35.33  20.25  356  7.25
     Working Jib  *  33.5  20.25  292  8.25
     Spinnaker  SL 55.9  SMW 37.8      1.5
     Super Spar
    Main, Mizzen
    masts and booms
     Data Taken from
    Westsail Owners Manual

    No storm sail data provided
    by Owners Manual
    *No data provided by 
    Owners Manual
  • April 10, 2011 10:08 AM
    Reply # 567786 on 564930
    In my Owners Manual there are no pages for the W42/43 Ketch, thus the missing table.

    My head sails are UK Halsey sails, the main and mizzen are Hood sails.  I do have a gennaker by North Sails that replaced the original Hood 1.5oz spinnaker.  The mizzen staysail and storm sails were not on the boat when I bought it.
  • April 10, 2011 1:43 PM
    Reply # 567855 on 564930
    I finally found the W42/43 Ketch sail plan, it was in Bud's handy to have Construction Manual.
    W42/43 Ketch   Luff Leech  Foot   Area Weight   Material
     Main  44.5  46  16.6  360  9.25  Dacron
     Mizzen  26.25  27.25  10  132  9.25  Dacron 
     Staysail  33  28.75  11.75  165  8.25  Dacron 
     Yankee  50  37.75  23.75  425  7.25  Dacron 
     Genoa  50  46.91  32.5  735  6.5  Dacron 
     Reacher  50  44.25  34.17  735  3.8  Dacron 
     Drifter  50  46  35.75  788  2.2  Nylon
     Working Jib  47.5  34  20  375  8.25  Dacron 
     Genoa Staysail  32.85  37.91  17.33  254  7.25  Dacron 
     Mizzen Staysail  33.5  25.5  28.75  315  2.2  Nylon
     Storm Jib  21.75  15.42  13.5  100  9.25  Dacron 
     Storm Trysail        120  9.25  Dacron 
     Spinnaker    SL 50.81  SMW 34.2    1.5  Nylon

  • April 12, 2011 8:43 PM
    Reply # 569572 on 564930
    Hi all,

    Does anyone have the dimensions for Kern's 350 ft2 "Super Yankee"? Also, Bud, who designed the 400ft 43'/37'/21' "Yankee" on the diagram you supply in your manual?

    I found a yankee in Bacon's Sails inventory made by "Kern's" with the follow measurements.
    Luff: 42' 8" Leach: 31' 2" Foot: 23' 2"

    This works out to be 350 ft2, so I think it very likely this is one of his W32 "Super Yankees", though I would like someone to confirm.

    Thanks all!
    Aaron N.
    Last modified: April 12, 2011 8:43 PM | Anonymous member
  • April 17, 2011 7:19 PM
    Reply # 572564 on 564930
    Deleted user

    Hello Everyone,

    Jen and I are approaching the end of the tunnel in our very intense endevour to bring Sumna up to Newfoundland standards. It has been a very busy year and a half. Hull has been insulated, decks and cabin top re-done, portholes re-built and sealed, hul-deck joint overhauled and sealed, wood stove install very close, re-wired, re-plumbed even some new electronics! Currently barrier coating/fairing the hull if the weather will give us a break.

    This Summer will be the rig, etc. Sumna is in need of a whisker pole and the only dimensions that I can find are  14' x 3" from the construction manual. But it was gleaned form a hand drawn rendering. I have heard that some folks use an old staysail boom (seems to short) we are missing that also by the way.

    It is quite likely that I will have to make a whisker pole. I would really appreciate it if someone could post the dimensions of the pole and how far up the mast from deck level to mount the bale for the pole. It might also be excellent data for the rig reference page ( the page is a great idea!)

    Any info is greatly appreciated.



  • April 18, 2011 1:10 PM
    Reply # 573040 on 564930



    I can get those measurements tonight, I also have a staysail boom available as I'm in the process of converting to free footed. Postage is all that would be required.


  • August 09, 2011 3:56 PM
    Reply # 672729 on 564930
    Its about time Cavalo get a new suit of sails and have found this topic to be of great interest.  I am wondering why our foot measurement on the boom is so much longer the the measurement on the 42?/43 table.  I get something like 18 and change to the very front of the outhaul car track, meaning the clew would be 2 feet or so short of this.  Is there any insight out there as to the proper foot dimension?  I have also heard murmurrings of there being a weather helm issue as well?  Having blown the main out in the first 10 knots we saw, I don't really know how she feels with the tatters i have sitting in the cockpit....  
    Any and all insight wold be greatly appreciated!

  • August 09, 2011 8:26 PM
    Reply # 672903 on 564930
    Hiya Cavalo,

    The original foot length for the standard W32 cutter rig was to be 15'10"...yeah, one BIG foot! The word in the wind about weather helm is somewhat true; the boats can develop weather helm, but that is not necessarily a function of their foot length. It's a number of things. The short answer to your question is that it is held by Kern Ferguson, a gent with great knowledge on the Westsail sailplans, that the W32's main should be about 14'10" at the foot for "overall balance." He also suggests full battens and a full roach, which Dave King and a few others have said really helps the boat's performance. When we replace our main, I'll probably go that route, too.

    That said, I have a 15'10" footed, battenless, roachless main and my boat hasn't show much of a weather helm issue; at least nothing out of the norm for a full keel boat. I believe most of our issues can be dealt with with proper luff and foot tensions for given wind conditions; draft control is essential! Also, on all sailboats, people tend to oversheet for fear of seeing anything but a "tight" sail. Mainsails, when going upwind, should always show a smidgen of true "luffing", that is, puckering or bubbling in at and about a foot or two abaft the luff, depending on the depth of draft. There is a giant aluminum pole in the way of the immediate luff catching wind, so it is proper that the luff will not be "tight".

    Ease the sheet, keep the draft flat and well forward when the wind pipes up, and you probably won't have issues with weather helm unless the sail is badly worn (and, in your case, with a torn sail, you're guaranteed not to have any!) Also, people commonly thing that going vangless and letting the sail "breath", aka letting the boom lift to spill wind, is a good idea. This really does little but hurt your sail. Keep your sail properly shaped with a vang on all points of sail and you'll be able to control your weather helm. Don't forget good luff tension on your headsails to keep your healing moment down, too!

    Also, of course, reef down. We go to the first reef in the main at ~15kts, 2nd at 22-25kts. This keeps weather helm in check.

    ~Aaron N.
    Last modified: August 09, 2011 8:32 PM | Anonymous member
  • August 10, 2011 8:54 AM
    Reply # 673285 on 564930
    Deleted user

    RE: weather helm...The rig profile on these boats was drawn with an attractive aft mast rake that increases weather helm. The rake can easily be reduced or eliminated by re-tuning the rig. A no expense, long-term cure for weather helm. There is a long thread discussing weather helm and it's various causes and solutions somewhere in the old forum.

  • August 10, 2011 11:16 AM
    Reply # 673420 on 564930
    Guys, I think Cavalo is a W43.. :)
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