Vincent DePillis

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About Vincent DePillis

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  1. Vincent DePillis

    How big a square top?

    What boat?
  2. Vincent DePillis

    How big a square top?

    Yeah that is the thought. just today I did a rough measurement of the mainsail head on a brand new Corsair 970 sport: 67”! i suspect that the main hull, mast location, and daggerboard location are v similar to f31. Hope to sail on the boat tomorrow. Should be interesting.
  3. Vincent DePillis

    How big a square top?

    Thx sidecar, that looks super useful. Will review in detail. Helm balance is nice in existing set up. I have the farrier marine deep F 32 rudder. So plenty of rudder to work with.
  4. Vincent DePillis

    How big a square top?

    Thx gnome. Any of your friends sailing f9/f31s? Would love to know their thoughts on mainsail plans. Looking for pix too. There are a couple of things I am wondering about – one is whether a big square top would increase the tendency of the boat to sail bow up. The F31s are a bit short on float buoyancy in the aft part of the float. I put on new larger floats but most of the volume is in the front of the float, increasing the bow up attitude when the wind increases. This is potentially helpful from a safety standpoint downwind, but increases transom drag upwind. ( I have been contemplating an setting up the mast dead vertical, eliminating the existing rake, as an experiment to see whether this would lessen the tendency to sail bow up.)
  5. Vincent DePillis

    How big a square top?

    Martin, I agree, stock main controls are undersized. My mainsheet is a custom Harken 12:1 ratchet fiddle block which I lead to a winch in heavy air, and I changed out the traveler for a Harken big boat traveler with 6:1 end controls. Not concerned about controlling the main. The mast is another issue. The F31r Omohundro mast section is a little undersized , and the unsupported top mast bends more than I would like. I do wonder if a 40% head will add a lot of stress to the mast . I could add shrouds to the mast head, at the cost of increased windage.
  6. Vincent DePillis

    How big a square top?

    Side car, those are exactly the questions I am mulling.
  7. Vincent DePillis

    How big a square top?

    That was a boat from south Africa, right? on race to Saint Helena or some such? Got a name for me?
  8. Vincent DePillis

    How big a square top?

    Man. Looks flat. And interesting to see close together shallow battens.
  9. Vincent DePillis

    Coolboats to admire

    Confession: I love this boat so much, I want to add a mizzen to my F31.
  10. Vincent DePillis

    How big a square top?

    Seems like batten angle, batten stiffness, and sail depth would affect twistability too. Shallow stiff battens, with flat sail is twister?
  11. Vincent DePillis

    How big a square top?

    Posted this query in F-boat list, with no response. Thinking about a new main for my F31rR Ian Farrier always advised against large roach sails, because it screws up center of effort. I have seen this effect personally, with a friends F31 that had been modified to have a larger boom and foot. The boat was unmanageable. But I see that more and more boats (multis and Class 40s in particular) are moving to mains with very straight leeches and very large heads. One experienced multi sailor here in the PNW has recently moved to such a sail, and has explained to me that the new sail has made his cat easier to sail-- that the big top twists so easily that it takes the punch out of the gusts, and he is doing less helming, and less trimming, with the new sail. He also emphasized the benefit of carbon battens, which keep the head flat and help pull depth out of the mid section of the sail as the head twists. Have any of you had experience with this? For reference, stock sail plan calls for a 38" head on a 14.3' foot. My existing sail increased head by 4", and decreased foot by 4", which works well. I have one proposal that calls for a 6 foot head (which seems pretty wild, TBH). Appreciate any thoughts and advice. Vince DePillis.
  12. Vincent DePillis

    Bronze Nuts?

    Always good to have DDW input. I have heard there is a lot of metal quality fraud-- even in aerospace, and by reputable companies. Is there any way to test for presence of Zinc that you know about?
  13. Vincent DePillis

    Bronze Nuts?

    On cosmetic stuff-- there is a relationship between cosmetics and function. Caring about how stuff looks is a way of paying very focused attention, and that attention feeds back into the functional decisions.
  14. Vincent DePillis

    Bronze Nuts?

    Never used barrel bolts. So clean. Really love that idea. thanks.
  15. Vincent DePillis

    Bronze Nuts?

    Sounds like nobody does this, which probably means that Slug is right. So now that I have the fastener Taliban assembled, what about acorn nuts for deck hardware? Too fussy? (this is a well loved but cosmetically challenged Corsair F31). Also-- some of the bolts are a bit to long. In the past, I have often shortened bolts in place with a cutoff wheel. I put a sacrificial jam nut on top of the working nut, cut the bolt flush with the jam nut, and then back off the jam nut, which helps clean up the threads. Is there a better way?