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Thread: The B6 Promises To Be The Bomber!

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    despondent correspondent Photoboy's Avatar
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    The B6 Promises To Be The Bomber!






    Last week Paul Bieker and Kris Henderson conducted a side by side test with the B6 vs B5 I-14s, Paul and Kris in the B6 and Fritz Lanzinger and Chris Bundy on the older B-5. Paul's been working on thoughts for the new boat for over a year, but with other commitments, including Team Oracle and now the ACRM, it's been a when time allows project.



    Recently completed by Kris Henderson in Ballard Washington, the B6 proved exceptionally faster in the light to moderate conditions even after switching crews. Henderson, known in the Seattle are for being on the leading edge in composite boat building and repair will be focusing on producing only these 14's for the foreseeable future. A bare hull with racks will set you back $17,500. A ready to sail (less sails) will be $28,00.00. You can contact " Hendo" at ballardyc@aol.com or 206.790.3224.

    At 154lbs, the boat rates in at the lowest weight allowed fore the class rule change due in 2013. Kris adds" We set out to build something as competitive as the B-5, without the sticker shock. The boats are hand built carbon fiber with divinycell and vacuum bagged, which is much less expensive then the pre-pregged auto claved hulls of the B-5. We're hoping to reach a middle ground for sailors who want the performance, at a reasonable cost" Noting the recent decline in attendance of 14's at events in recent years " We are starting to see a resurgence in interest, and if we can
    build a more affordable boat with even better performance then previous generations, it will help push it along"

    Kris has taken 5 orders of the boat thus far, and will be producing about 1 boat every two months, so if you want one for the 2013 Toronto Worlds, best get your order in soon! Hull number 1 will be available for viewing at Seattles Fisheries Supply Boat Swap over the next couple weeks, for those interested in kicking some tires!


    __________________________________________________ ___________________


    Paul Bieker on the B6 (6th evolution of the Bieker designed International 14)

    My goals for the B6 design were as follows:


    •Increase pointing ability. 14's are now 10+kt boats upwind but you still judge laylines by looking over your aft shoulder! Since righting moment is fixed, the best way to increase point is to reduce drag, both above and below the water.


    •Reduce cost. Since adopting prepreg construction in the top boats about 5 years ago, the ready to sail cost of 14's has risen to around $50k USD. I cannot stomach that reality.

    (Estimated cost of B6 :A bare hull with racks is $18,500, including designer royalty to Paul Bieker. It is ala carte from there with an all up boat, less sails around $27,500 F.O.B. Contact ballardyc@aol.com)



    I've attempted to increase pointing ability by trying to reduce drag wherever possible. Under the water, I have reduced the width of the hull to what is basically the practical minimum allowed by the rule. This should reduce the windage and added resistance in waves. Although removing it would reduce the cost of the boat, I have kept the jibing centerboard design since it improves the efficiency of the daggerboard (by allowing it to be smaller) and it reduces the added resistance from the hull due to leeway (more important in this design because of its deep forefoot). Over the years, I have had a lot of experience watching fuller bows outperform finer bows in boats that have a lot of power for their length, the most obvious example being the IACC yachts.






    Ian Andrews Photos

    It may be startling, but a 14 has approximately the same displacement to length ratio as an IACC yacht, so I think it is a fair guess to think that they would benefit from a fuller entry. With the B6, I did this by fairing the boat out to a point 15cm or so forward of the bow whilst taking as much volume as possible in the mid stem (I am not a believer in the dreadnought bow on a 14 - why make it shorter than 14' especially when you want to extend a bowsprit almost 3 meters forward from the upper bow). I then "chopped" this surface off aft of the finished bow and faired it off with a parabolic surface so that the lower bow would be bulbous but not exceedingly blunt. This "bulb" should just smack the water upwind in breeze but be fully submerged with the sharp portion of the stem at the free surface in light air. It's going to be really interesting to see how this shape performs!


    Above the water, I have increased the height of the forestay to improve the effective aspect ratio of the rig and removed the upper spreaders and upper shrouds to reduce windage. This has the added advantage of significantly reducing the rig weight (which is unmeasured weight in the 14 rule). In order to keep the jib size reasonable (i.e. not make the main too small), I have reduced the J measurement. This should allow us to achieve better headstay tensions for a given amount of shroud tension, further improving rig efficiency. Since the hull is too narrow to provide a reasonable shroud base, I have moved the shrouds out onto stiff but relatively low windage rack supports.


    Making the boat small helps minimize laminate area and hence reduces the advantage of using more expensive construction techniques. The B6 hull and deck will be carbon/epoxy skins on a foam core. The first boat is vacuum bagged wet laminate however I think our molds will work well for resin infusion. I anticipate that we may offer a combination Eglass outside skin/carbon inner skin boat option to further reduce cost. I have simplified the deck layout compared to the B6 by removing the underdeck chute trough and foredeck. This reduces cost and should allow the weight to come in close to that of the prepreg B5.

    -Paul


    http://www.biekerboats.com/Bieker_Boats/Home.html
    " I just found out my nest egg has salmonella"



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  2. #2
    PNW Editor Ballard Sailor's Avatar
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    Way to go Hendo - glad you're having fun with construction!
    A little disorganization goes a long way toward fun sailing.

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