59355Re: [bolger] Re: Water Ballasted Chebacco
- Jan 8, 2009Denny,
I have a very stock sheet ply version. No ballast. The CB is
only weighted to the basic spec to facilitate lowering and staying
down. I do not necessarily get significant wave noise when at
anchor, but have never spent the night on board. I day sail it
mostly. Never capsized, but I'm a conservative sailor I've only
ever heard of one knockdown and that was in Penobsoct Bay as I
recall, but I could have that wrong. A scary ride is relative. As
I said, it's a big dinghy and needs to be handled with a sensitive
hand on the main sheet. At least that's how I sail her. The
rudder is surprisingly effective given the size and I tend to sail
it through the wind. Being unballasted I try to think that it's a
big laser and use the main to help tack. The mizzen at best is a
steadying sail, and in many wind conditions more aesthetic than
Be sure that it's cut dead flat by the way. I hear with any camber at all
it induces some negative helm characteristics. I wouldn't know about that
since I had Bohndell cut my sails to Bolger's specs and they are
Hope this helps,
> Glad to hear from an actual owner so quickly. Thanks.
> Which variant do you have? Sheet ply? Lapstrake? Any ballast?
> Weighted C'board?
> Do you hear ripples slapping against the bottom at anchor?
> Does the boat easily sail through the eye of the wind when you tack?
> Ever had a capsize? Near capsize? Scary ride?
> I appreciate your first hand info.
> Denny Wolfe
> More comments below:
> --- In email@example.com, eheins@... wrote:
>> As a Chebacco owner, I think that there are some interesting points
>> made, however, IMHO, changing the hull geometry is beyond where I
> would go
>> and still consider the boat a Chebacco. One of the Chebacco's
>> points is it's ability to behave like a big dinghy, but stiffen up
>> the chine goes under. I'd be surprised if a round bilge, water
>> configuration would improve on those characteristics.
> The righting moment of the water ballasted boat is the same as no
> ballast flat bottom at low angles of heel. The "above the waterline"
> shape is the same in both cases so the form stability is the same
> too. The water ballast begins to make itself felt at angles above
> about 15 degrees and gets rapidly more significant as more of the
> ballast is raised above the water line.
>> it would make the boat probably more difficult to trailer given
>> the flat bottom provides a stable platform to support in transit,
>> I've trailered Boudicea thousands of miles without a worry.
> I agree the trailer bunks would have to be a bit more complex to
> accomodate the round bottom hull.
> I won't get
>> into the ongoing controversy about water ballast in general,
> however I
>> agree with the folks that discount the value, given that while the
>> ballast is submerged, it's virtually neutral bouyant although it
> adds some
>> difference between the positive bouyancy of an air filled bilge.
> I agree, too, that the water ballast can't make any righting moment
> difference unitl it begins to go above the water surface. It doesn't
> take much of a heeling angle to do that, however. Its weight
> increases forward momentum so making the boat more sure through
> stays. It has a negative effect on speed - about 10% at 5 kts - but
> sail area could be increased proportionally to restore the speed.
> If it
>> were me, I'd continue looking for a current design that had more of
>> characteristics you want, as my personal experience tends to be
>> like Finagle's Law in that anything I try to make better usually
>> in something worse.
> I hear you there!!
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