Harry Pattison

Members
  • Content count

    524
  • Joined

  • Last visited

Community Reputation

1 Neutral

About Harry Pattison

  • Rank
    Anarchist

Contact Methods

  • Website URL
    http://www.epsails.com
  • ICQ
    0

Profile Information

  • Location
    Newport Beach sometimes

Recent Profile Visitors

5,322 profile views
  1. Harry Pattison

    Top-down furler issue

    The usual problems would be the sail luff is too long. Anything longer than 3% more than the distance between the two attachment points on the furler will cause that problem. Next most likely is not having a really good torque cable. They have made big improvements in ability of the torque ropes to really transmit the torque in the last few years.
  2. Harry Pattison

    Capo 30 rig

  3. Harry Pattison

    Capo 30 rig

    I would wait for Ballenger.
  4. Harry Pattison

    N2E Wx Thread- Could Be Interesting

    Make sure you don't set your auto pilot at 2 in the morning and take a nap. There appears to be some dirt on your route. :-)
  5. Harry Pattison

    Maibu Return Race

    Perfect :-(
  6. Harry Pattison

    Maibu Return Race

    Anybody going from Newport Beach to MDR and back tomorrow for the race. I’m looking for a ride both ways. Thanks Harry
  7. Harry Pattison

    Sail: how much is shape and how much is material?

    Shape is everything. How long the shape lasts is determined by the quality of the material.
  8. Harry Pattison

    Creating performance targets

    We find that if you sail your targets, and your targets are accurate, you will be sailing the correct angle which give you the best VMG. Any higer or lower and your VMG will not be as good. Targets are as much for, or probably more for, proper trimming, crew work and helming as opposed to picking the correct angle. In fact upwind I have never sailed on a really good boat that looked at the Target TWA upwind, we always compare BSP to Target BSP. I also think you will find changing your heading by 1 degree will not give you a .1 knot increase in speed.
  9. Harry Pattison

    Creating performance targets

    Of course the problem with that is if you have two boats that are the same and boat one sails a two hour race at 5.7 knots while boat two sails the race at 5.8 knots, boat two will be .2 miles ahead at the finish. The biggest problem with having Polaris based on your own sailing ability rather than the potential of the boat, is that when you start sailing better you will have times when you will be sailing faster than your targets. When racing with real targets one of the important things is to not sail faster than your target. If you are that means you are not pointing as high as you should up wind, or you're pointing to high downwind.
  10. Harry Pattison

    Creating performance targets

    The problem with that is as LionessRacing said, it will be impossible for you to get accurate Polars that are any better than your own ability. While that may be fine for a select few, it is far from optimum for most of us.
  11. Harry Pattison

    Creating performance targets

    You can get a Performance Package for US Sailing that will have all your calculated Polars and Targets.
  12. Harry Pattison

    Exp/B&G: Relative Bearing to Mark

    Not sure what you mean be relative bearing but Expedition will certainly display bearing and range to any mark you have in your active course.
  13. Harry Pattison

    Computer wireless remote screen

    You can also use Ventus PRO. It gives you the ability to view any Expedition data on a smart phone or tablet and also gives you control of some of the most important functions in Expedition. And much easier to view and faster response times than a virtual desktop.
  14. Harry Pattison

    PHRF-NW Sprit penalty??

    Which is why PHRF is really screwed up. Doesn't US Sailing dictate to the areas what sail dimensions are supposed to be for PHRF? And what the boat Dimensions and equations are supposed to be for rating purposes? And how much room you give a boat that is rated for a SYM to attach a ASYM in front of the max J dimension? No.
  15. Harry Pattison

    PHRF-NW Sprit penalty??

    PHRF NW, which is what kirklandboat is asking about, uses the spinnaker luff, leech, foot and SMG to calculate the area of a spinnaker. HOWEVER SMG is taken as the largest of either the measured spinnaker mid-girth OR the SPL times 1.8. So if you have for example a spinnaker with a mid-girth of 18' and an SPL of 10' they match and you rated SMG is 18'. If you now increase your SPL by his 14" you now have an SPL of 11.167 and multiply that by 1.8 and you get 20.10' which since it is larger than the spinnaker mid-girth of 18' it becomes your new SMG. And having an SMG of 20.1 instead of 18.0 will increase your rated spinnaker sail area. You take the new rated sail area of the spinnaker and add it to the standard area of your mainsail. Then you compare that total to the total of the standard spinnaker area plus the standard mainsail area and depending on how much bigger it is your rating may or may not change. For instance if the new total area of the spinnaker and main is between 1.045 and 1.075 times bigger than the area of the standard spinnaker and standard main then your rating will get adjusted by -3 seconds per mile. If it is between 1.075 and 1.105 your rating will be adjusted by -6 seconds. Send me your P, E, ISP, and JSP measurements along with the SLE, SLE, SMG, and SFG measurements from your current certificate and I will tell you what affect adding 14" to you SPL will do to your rating. NOTE adding a sprit of 14" may not add 14" to your SPL. That will depend on if you had a standard J length pole before, and also if the headstay is right at the bow or set back some distance. Harry