A3A

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10 Whiner

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  1. A3A

    3di Endurance vs Raw with Offshore Ply

    3Di Offshore Ply is an additional internal bias ply layer added for improved flogging resistance. Raw and Endurance are different surface treatments with Endurance having the better abrasion resistance.
  2. A3A

    Sail Measurements String Vs Paneled

    Other than different materials having different stretch and shrink properties that might need to be allowed for, no, the sails should be the same dimensions when new. As soon as you start using them, they will age differently.
  3. A3A

    Classes that don’t allow 3di?

    Technically, 3Di meets the definition of a Woven Ply under the ERS, but it also fits the definition of a Laminated Ply: G.1.4 Sail Construction (a) BODY OF THE SAIL The sail excluding the areas where parts are added as per G.1.1. (b) PLY A sheet of sail material. (c) SOFT SAIL A sail where the body of the sail is capable of being folded flat in any direction without damaging any ply other than by creasing. (d) WOVEN PLY A ply which, when torn, can be separated into fibres without leaving evidence of a film. (e) LAMINATED PLY A ply made up of more than one layer.
  4. A3A

    North 3Di vs Quantum Fusion M 9000

    The huge difference between 3Di and all other high modulus sail fabrics is the complete lack of Mylar film. Mylar is the demon seed that leads to shape changes from shrinkage and delam, the two most common reasons sails become unusable.
  5. Volvo sails have no carbon in them at all. They are all Aramid & Dyneema to avoid signal blockage.
  6. A3A

    New Mainsail - what sailmaker What Type

    I find it funny that a primary consideration of a sail purchase seems to be how easy it is to take down and put the cover on.
  7. A3A

    Sail Material for Overlaping Genoa

    Your 0 to 18 knots is easy structurally and impossible shape wise. It is easy enough to make the sail strong enough, but the shape requirement for 8 knots is much different than at 16. You need to be very clear about what range you want the sail optimized for and accept that it will not be ideal outside of that range and worse the farther from it you get. Nothing wrong with the NLXi09 material if you are looking for a current version of 1990 sail technology. The problem with paneled sails is they have a lot of material that isn't really doing much because it isn't oriented to the loads, even with radial construction and they have the same flaw as 3DL and all other membrane sails, Mylar film is hard laminate, it shrinks and it gets brittle. 3Di now has many flavors and a 30 foot boat can use NorDac 330 (all poly) or RAW 360 which is an Aramid & Poly blend better suited to smaller sails. For overlapping genoas using RAW products, the leech section gets the same surface as Endurance anyway.
  8. A3A

    Masthead vs Frac Assym

    In general, short wide sails are slower than tall skinny sails of the same area......
  9. A3A

    everybody doin' it?

    As mentioned above, looking at any sail in isolation ignores the way the whole sailplan works as a wing. With the very tight jib sheeting angles (4 degrees!) of the TP52 / Maxi 72 types, boom over center in lighter air works because it keeps the slot open. It only works like this if the sails, hull and foils are really refined for high performance and the driver has skills. If your boat won't sail upwind with VB near TWS, it's probably not the right mode for you.
  10. A3A

    New sails

    Hey, I want to be rich but I want to keep working in the marine industry........Some problems don't have solutions, just compromises. A lost art in today's world....... Define "max sail area". Mainsails are generally measured by girths and then a formula uses those to calculate a rated area. So if Max Area = Max Rated Area, you are rated for what you have. If the rule is any good, you get credit for the smaller roach. If a sail with a traditional 38% top 1/4 girth overlaps more than about 10-15 cm, I would look at ditching the full battens at the top and a 5 leech batten configuration. The FB are what causes the sail to not tack.
  11. A3A

    New sails

    Sure, you can execute this concept perfectly, but it still is the wrong plan form for sail performance. I've been around a "looonngg" time too. 55 years of sailing and 44 of sailmaking in fact. Except for clearing the backstay easily, this concept has no aerodynamic basis at all. There are dozens of articles, books and threads to explain why, but it's easier to look on the race course. Virtually all performance mainsails today are the complete opposite: fat heads.
  12. A3A

    New sails

    But a bad one if you are interested in decent aerodynamics and proper twist. Please do not buy into this nonsense, it makes a bad sail.
  13. If a wave peaks in the ocean and no one is there to see it...........
  14. A3A

    North sails ,pricing, discounts

    The difference between RAW and Endurance is mostly in the outer surface treatment. The exterior tapes on Endurance are heavier and more resistant to abrasion, so they result in a more durable sail. RAW exteriors are lighter and more flexible which makes them better for performance, but they are not as durable. In either case, the basic structure is the same with 760 being a spectra / aramid blend and 780 being spectra / carbon, although I think it has some aramid, too.
  15. Make sure that you and your sailmaker have the same definition of "adding a furler". Do you just want to go from having to install and remove the sail every time to just being able to roll it up and walk away, or does it might mean sailing with a partially furled sail in heavier air? What attaches it to the stay doesn't matter that much, but the sail sizing and structure does. If you buy a hank on sail now, and want to roller reef it in the future, it needs to be built as a roller reefing sail. If the furler is not allowed for in the sizing, the geometry change a later furling conversion requires may compromise the sail structure. Buying the sail now and adding the furler later should not make any difference, as long as you are clear about long term expectations and plan accordingly.