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Hobie 16 increasing mast rake  Bottom

  • Hey all,
    I'd like to try increasing my mast rake a bit. I've been reading up on it and it seems that it offers some benefits - one of which is being less prone to pitch poling. Currently I've got the forestay on the loosest position on the bridle, and I've got a double adjuster with a bungee on it:
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=135145&g2_serialNumber=3&g2_GALLERYSID=0dce4f3ce236347c5c314610677abd0a

    Any reason why I can't just jam another adjuster in there? Or any other tricks to try? Can I use a piece of line? What is the long term rake adjustment - new rigging?

    Thanks!

    --
    Bryan in Poplar Grove, IL
    Supercat 17, unknown year. Future project
    Hobie 16, 1977 - died a spectacular death https://youtu.be/Y7O22bp2MVA
    Hobie 16, 1978 - current boat
    --
  • Yes, new forestay, new mast base for mast and crossbeam so that the mast rotation stops meet. And, Jib is cut different,
    You can recut and sew your jib and put a new clew on it, someone on here or on another site... https://www.hobie.com/forums/viewtopic.php?t=51014 overlayed the modern jib to.the old one, looked like a new angle across the bottom of jib to allow it to fit crossbar when mast rakes back. Might be easier to get the right jib..plus main sail might be cut different... not sure
    also increasing mast rake will increase rudder helm, the newer hobies have adjustable rudder rake so you can increase the rudder rake to decrease weatherhelm.. the old way to do this was move the hole in the rudder.. tricky to get right.. I had my guys in the machine shop duplicate the new style adjusters into my old castings (easy to do since my son's 16 had the new style) for the rudders.. or you can scour ebay for the newer adjustable rudder castings.. also the seaway blocks are'nt the best for maximum rake so I replaced mine with a used set of harken 6:1.. sometimes you can find a deal



    Edited by carl2 on Oct 14, 2021 - 08:46 AM.
  • Thanks carl2, it is starting to sound like a slippery slope!

    --
    Bryan in Poplar Grove, IL
    Supercat 17, unknown year. Future project
    Hobie 16, 1977 - died a spectacular death https://youtu.be/Y7O22bp2MVA
    Hobie 16, 1978 - current boat
    --
  • Increasing the mast rake a just small amount won't require all the changes that Carl2 mentioned. You'll just have to lengthen the forestay and there are many ways to do that. If the boat is already balanced with the desired weather helm, don't do it. It will also lower your boom clearance which isn't very much on a H16 to begin with. It will slightly change the sheeting angle of the jib, you may have to use a different hole on the clew plate to compensate. As far as pitch-poling goes, a small change won't make that much difference when the boat is sailed properly. Murray's used to sell these anti-pitch pole foils which look very easy to install. They may still sell them and I'd be very curious to hear from someone who's tried them.

    --
    Bill Townsend
    G-Cat 5.7
    Sarasota
    --
  • shortyfoxMurray's used to sell these anti-pitch pole foils which look very easy to install. They may still sell them and I'd be very curious to hear from someone who's tried them.

    They still sell them - $163.
    https://www.murrays.com/product/01-3240/

    Joyrider TV did a review on them:
    https://youtu.be/8k0zpRec7Ho

    I'm in the process of making a set:
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=135926&g2_serialNumber=3

    Thanks Bill for that feedback.

    --
    Bryan in Poplar Grove, IL
    Supercat 17, unknown year. Future project
    Hobie 16, 1977 - died a spectacular death https://youtu.be/Y7O22bp2MVA
    Hobie 16, 1978 - current boat
    --
  • love this guy.. :)
    https://www.youtube.com/watch?v=l_sZj60wtZI
  • Quotelove this guy.. :)

    Oh yeah, I've watched Joe's mast rake video. That was what got the gears turning. Here it is as a clickable link:
    https://www.youtube.com/watch?v=l_sZj60wtZI

    --
    Bryan in Poplar Grove, IL
    Supercat 17, unknown year. Future project
    Hobie 16, 1977 - died a spectacular death https://youtu.be/Y7O22bp2MVA
    Hobie 16, 1978 - current boat
    --
  • Hold on...wait a minute....back up!

    On the H16, the forestay has nothing to do with setting mast rake. Rake is set by pinning higher (forward rake) or lower (aft rake) on the shrouds. This limits how far forward the mast can go when the jib halyard (whole rig actually) is tightened (and the forestay goes slack). When pinned lower on the shrouds, the forestay does have to be long enough to connect to the bridle when stepping the mast. If yours isn't long enough with two adjusters, it's not an H16 forestay.

    In practice, you aren't going to be able to rake very far back on an older boat with stretched sails and a 5:1 mainsheet. When sheeted hard with max aft rake, the mainblocks should be just shy of block to block. Any further aft and you'll go block to block before tightening the mainsail. Newer H16s (like Joe's in the vid) have a low profile 6:1 mainsheet system and the lower block is pinned directly to the traveler (no shackle)...all to reduce the block stack height.

    Raking aft also requires that the jib be pinned higher at the tack; otherwise, the jib goes block to block before getting tight, too. (There are ways to reduce that stack height as well.)

    As mentioned above, newer H16s have features (different mast base/step, cut of jib, etc.) to allow more aft rake, and raking aft does put more pressure on the rudders. That's why top racers have EPO3 blades that cost ~$500 a pop.

    It should also be mentioned that aft rake will make the boat suck downwind in lighter air.

    The anti-pitchpole foils have been around forever....no one uses them, and that vid isn't very convincing. Here are some other mitigative measures to try when sailing off the wind in heavier air:
    Get your weight as far back as possible. Crew should trap out behind/straddling skipper. If double trapped, crews rear foot should be between skippers feet.
    When sailing a beam reach, start with traveling the jib out half way. It there's too much pressure on the bows (pitching threat), travel it out all the way. In even bigger air, you can travel the main out further, too, to reduce heeling and pitching.
    On a broad reach, the main should be sheeted a little harder/flatter than for lighter air, and you need to push the boat farther downwind the harder it's blowing (and as you feel a gust coming). The objective is to stall the mainsail a little (or be on the verge of stalling) which keeps the boat flat and minimizes the leeward bow digging.

    --
    Jerome Vaughan
    Hobie 16
    Clinton, Mississippi
    --
  • Thanks Jerome! I have my stays 3 holes from the bottom. That's as far down as I can go before my forestay won't pin to the bridle adjuster. Initially we had the stays higher and were able to pin to a single bridle adjuster. So maybe it is stock, and we have it back as far as it will go?

    We are working on getting our weight further back. We are still beginners on the trapeze. I've put some neoprene on the aft hulls, so we can put one foot back there. I had some leftover after we did the rail rugs.
    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=135931&g2_serialNumber=3&g2_GALLERYSID=75b3bf785dc432f80a80c84c76f02098

    --
    Bryan in Poplar Grove, IL
    Supercat 17, unknown year. Future project
    Hobie 16, 1977 - died a spectacular death https://youtu.be/Y7O22bp2MVA
    Hobie 16, 1978 - current boat
    --
  • There's no set rule for this. Take your boat out and see how it feels and then make the changes.

    There sure has been a lot of discussion about pitch poling. Why do you think someone invented those anti- pitch pole devices? It's because H16's pitch pole! So I'm going to repeat myself at the risk of raising the ire of die hard H16 fans. Bryan, you seem like a resourceful guy. That being said, turn some of your energy into rebuilding that SC17 of yours. The volume of those hulls will make pitch poling a non- issue not to mention many other attributes the SC17 has. Try to imagine a day with whitecaps and two people on the wire and a third person driving the boat. You can do that in the SC17.

    --
    Bill Townsend
    G-Cat 5.7
    Sarasota
    --
  • shortyfoxThat being said, turn some of your energy into rebuilding that SC17 of yours.

    This project is on the docket for this winter... I promise!

    --
    Bryan in Poplar Grove, IL
    Supercat 17, unknown year. Future project
    Hobie 16, 1977 - died a spectacular death https://youtu.be/Y7O22bp2MVA
    Hobie 16, 1978 - current boat
    --
  • waiex191
    shortyfoxThat being said, turn some of your energy into rebuilding that SC17 of yours.

    This project is on the docket for this winter... I promise!


    Before you go out and buy or modify your forestay, grab a piece of 1/8" dyneema and use that to get your shrouds to the max rake position. Do keep in mind that if you rake it back too much, the rudders will load up too much and could cause other issues. There is a point of too much. I would say try it and experiment. What's the worst that can happen? That is basically how we all got here; experimented and succeeded or failed.

    --
    Scott

    Prindle 18-2 Mod "FrankenKitty"
    Tornado Classic "Fast Furniture"
    Prindle 19 "Mr. Wiggly" - gone
    Nacra 5.8 "De ja vu"
    Nacra 5.0
    Nacra 5.8
    Tornadoes (Reg White)
    --

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