Possible rig for Scarab 18

Discussion in 'Multihulls' started by buzzman, Sep 2, 2012.

  1. buzzman
    Joined: May 2011
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    buzzman Senior Member

    Hey, all

    Am looking at building the Scarab 18, and have been offered the rig (complete) of a Farrier 680, with 8m mast, fractional rig.

    Ray Kendrick states his 18fter requires an 8.6m mast.....

    So that's an 8.6m mast for a 5.5m tri...

    Whereas Ian specced an 8.0m mast for a 6.8m tri....

    So, two questions, really.....why (either of them specced whichever) and secondly, would the 680 rig be ok on the 18ft Scarab..??

    And please don't say 'ask Ray' - I have. Am awaiting response.

    Looking for other opinions, preferably from actual designers or builders, not just theorists. :)
     
    Last edited: Sep 2, 2012
  2. jamez
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    jamez Senior Member

    It sounds like you've been offered a non standard TT680 rig (which was masthead originally). I think Ray used a Tornado rig on the prototype 18. So compare the sail plans Centre of effort etc, make sure the spar section is up to it and suggest getting some advice from a sailmaker/rigger etc. experienced in multis if you need to make changes without the designers advice. If you get it wrong the boat won't balance and could be a pig to handle.

    http://www.myrc.org/Library/centeref.htm
     
  3. Ray Kendrick
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    Ray Kendrick Designer

    Hi Buzzman
    The Farrier 680 rig might be usable for the Scarab 18. I believe there were 3 rig options available for the 680 so you would have to do some measuring to ensure a good fit. I have no idea of the mast section size but it would probably be suitable. Some 680's had a mast head rig which would not fit with what I have drawn for the Scarab 18.
    Regards
    Ray Kendrick
     
  4. warwick
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    warwick Senior Member

    Jamez.

    For working out the center of effort, do you include the roach of the mainsail when it become a reasonably large portion of the mainsail area.

    My thought is that it might drag it back a bit, mind you it still is done as a flat object.
     
  5. jamez
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    jamez Senior Member

    I'm not a designer or sailmaker, but i suppose you would have to as a large roach could affect the outcome. Not sure how you would allow for this though, or what degree of accuracy is necessary. A square top could be treated like a gaff main as per..
    http://www.goodoldboat.com/reader_services/articles/Helm_balance.php
     
  6. warwick
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    warwick Senior Member

    Thanks Jamez, I just thought you might have had an idea as you have had experience with the square top main which is a extreme case.

    It just may help others as well.
     
  7. jamez
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    jamez Senior Member

    I think you may have mistaken me for someone else re.square tops the only boats I have sailed on with them are other peoples. I've just been giving rig interchangeability a bit of thought recently as it was mast ordering time and I've got a bunch of second hand sails for my boat that are close, but not exactly the same shape as designed (and not square tops either).
     
  8. redreuben
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    redreuben redreuben

    Warwick, you may be thinking of Samnz ?
     
  9. redreuben
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    redreuben redreuben

    Jamez,

    How's the Delaveau tri coming along ?
     
  10. warwick
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    warwick Senior Member

    Thanks Redreuben, I have been in contact with Jamez via the private messages and cleared it up.
     
  11. jamez
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    jamez Senior Member

    Apologies for the drift. BUT, still plodding along, finished the center hull just over a year ago and have been building floats and beams since. Also have ordered all the stainless bolts to hook it all together and decided to buy a new mast rather than resurrect the old broken one I had. Had the dagger board and rudder CnC'd from blanks - need to glass those. Beams are glassed and I'm decking the floats now. Hope to have the platform together in the yard by Xmas and trial fit the rig. We'll see how it goes :D

    I have a thread here which I update from time to time:
    http://crew.org.nz/forum/viewtopic.php?f=37&t=14022
     

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  12. buzzman
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    buzzman Senior Member

    Thanks for the thread hijack folks, as I hadn't seen Jamez Nicky Cruz before....great looking boat! Inspiring!

    But back to the possible Scarab rig...... :)

    Does anyone in Oz know of a reputable and/or cost-effective method of moving masts?

    I've checked with the RTA and there is no way known it can be legal to put an 8m mast on top of a normal car or one-tonner...rang 'em and double-checked as well....

    Max overhang is 1.2m in front of the headlights, and 60% of the wheelbase behind the rear axle centreline, which as it happens is WAY less than the 1.2m I *thought* I could overhang at the rear.

    As my car is only 2.5m wheelbase that's 1.5m behind rear axle line, which equates to approx 500mm behind the rear bumper line.....oooppppsss....broken THAT rule a few times before LOL

    So has anyone previously used a freight company or know of one that is 'yacht friendly' or even who NOT to use.... ;)

    Any / all actual experience appreciated.....

    Oddly enough, the *1.2m "rule"* does apply to trailers, but even so, on my 5m trailer, that will still leave 1.8m protruding forward of the trailer.

    As loads of trailer yachts do this, can it be legal..??
     
    Last edited: Sep 7, 2012
  13. redreuben
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    redreuben redreuben

    Mast moving

    I would be calling local rigging shops and getting advice / reccomendations from them.
     
  14. jamez
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    jamez Senior Member

    Most of the riggers over here have a smallish box trailer with a really long drawbar. Some of them will hire the trailers only or will move a mast for a fee.
     

  15. HASYB
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    HASYB Senior Member

    Make the mast into a trailer.
    In a former lifetime I used to make a lot of wooden spars, a friend of my made a construction of an axle with a V of steel welded on top, also a V of steel was welded to a drawbar.
    The V's were fastened with belt straps to the mast. Masts up to 20 meter were transported easily with some care.
     
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