jblumhorst

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About jblumhorst

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  • Birthday May 5

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    http://www.hydesailsdirect.com

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  • Location
    San Francisco
  • Interests
    Sails

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  1. jblumhorst

    New Corsair 880

    Got a picture?
  2. jblumhorst

    New Corsair 880

    .
  3. jblumhorst

    New Corsair 880

    What trimaran do you own?
  4. jblumhorst

    New Corsair 880

    If we can’t get a good nights sleep, the layout is impractical for a couple for cruising and vacationing. We won’t be buying one.
  5. jblumhorst

    New Corsair 880

    I emailed Corsair with a question about the berth dimensions. The aft cabin is only 38” wide. That’s a wide single berth, but not a double. And the vberth is too narrow for two sets of feet. I don’t see how you could sleep 5 adults on the 880 or where a couple could share a berth comfortably as its currently configured.
  6. jblumhorst

    New Corsair 880

    The red lines on the polar diagram represent the output from the designer’s VPP for the 880 Sport. The black lines are for the non sport version. The Sport 880 (red lines) has a taller mast and larger mainsail and Genoa, a screecher and asymm as standard. It’s faster. The Cruise 880 (black lines) are for the cruising version shorter mast, smaller mainsail and smaller self-tacking jib, and without the optional sprit, screecher and asymm.
  7. jblumhorst

    North Sails "Norlam" - What is it?

    I think Kestrahl is correct about the cruising version of Norlam way back when. It had row skins of warp oriented Dacron on the outside, with one layer of mylar film in the center. The racing version of Nordic was a Dacron cloth core in the center, with mylar on the outside. This is From the 2004 archive of North’s website: Polyester laminates are the next step up in performance from woven polyesters. They combine Mylar™ film with polyester cloth in two or more plies. The much looser construction allows for flat, straight yarns, especially as compared to the pure woven cloth above, and a warp oriented layout. The cloth can be woven more loosely because the Mylar film provides diagonal stability. North NorLam™ laminated polyesters deliver lower stretch and lighter weight than woven polyesters. For cruisers, the laminate structure is typically a Mylar core with polyester cloth on both sides (see close-up left). For racers, a heavier, stiffer Mylar film is typically laminated to one or both sides of a cloth core. https://web.archive.org/web/20040603142329/http://na.northsails.com/North_Cloth/fiber_to_fabric.html
  8. jblumhorst

    North Sails "Norlam" - What is it?

    Norlam used to be what North called its cruising laminate for tri radial, paneled sails. It was a polyester scrim sandwiched between Mylar film, with light weight polyester taffeta son both sides. I don’t know if they are still selling it or not. It’s pretty comparable to contender’s CDX and dimension polyant’s DCX. There are incremental improvements in all three company’s products every few years.
  9. jblumhorst

    Tides Marine Mast Track System

    What was the mode of failure? What model and size of sailboat? What size mainsail?
  10. jblumhorst

    Tides Marine Mast Track System

    I’ve got the Tides track system with a Carbon mainsail with 7 full battens. Works beautifully. The sail drops by gravity In less than two seconds on my boat, even in 25+ knots of wind. It’s super easy to hoist and to reef. The sail slides attach the same way as any other system, using webbing loops. The track needs to be replaced about every 10-12 years in high UV climates. It’s super easy to DIY. The whole system is a fraction of the cost of an aluminum track systems, so it’s still less expensive than a Harken or Antal etc system. Full MSRP on the track is $13-14 per foot. Street price is, of course, lower.
  11. jblumhorst

    Heavy duty sewing machine

    I’ve been sewing for over 50 years, and at the moment own two industrial machines, one all metal singer from the 1950s, and a 100-stitch $300 plastic home machine. The singer 301 has been in my family for 65 years, in perfect working condition. It’s a slant needle like the 401a, with similar construction, power and drop feed.. it is a straight stitch, no zigzag. I made a Sunbrella dinghy boat cover with the Singer 20 years ago. It got the job done but..l. I broke a lot of needles because things slip when feeding the material heavy, bulky material through through. The motor struggled to power the needle through 3/16” worth of Sunbrella and webbing. It took 3-5 times longer than it would on a more capable machine. It missed stitches when going from two layers to six. .... but it got it done. Some technical specs relevant to doing heavy work Max thread size you’ll be able to use is v69 due to the bobbin and thread tension adjustments. (Compare to Sailrite ultra feed LZ which can handle v92, vs industrial machines which handle V138 and bigger, which is better good for UV covers). This machine was designed for sewing cloths, with tailoring-size 30 thread. The presser foot max height is about 6-7 mm (vs Sailrite LZ1 max height of 9-10) . The Singer will skip stretches going from two layers to thick seams. (I measured it on my machines, with difficulty, so that’s not very accurate. But the Singer’s presser foot height is clearly smaller) The 401 bobbin is very small for use with heavy thread. It runs out very quickly because it doesn’t hold much thread. My summary: The Singer 401 series will handle the thinner assemblies okay, but will not do well at the corners, curves, and double seams. Expect to break needles and drop stitches. If it’s your first experience sewing, you may be frustrated because you will have problems that aren’t due to your sewing technique. That makes it hard to climb the learning curve, I believe.
  12. Having fun with my new-to-me F-24-mk1 tri.

  13. Working on getting goodies for my new J70

  14. It's too cold for me! 30 degrees F