[C320-list] Boat Draft and Grounding (Wing Keel)

[bruceheyman at cox.net]

A shorter keel!
Sent via BlackBerry by AT&T

-----Original Message-----
From: Dean Vermeire <dean at vermeire.us>
Sender: c320-list-bounces at lists.catalina320.com
Date: Fri, 13 Aug 2010 16:42:02 
To: <C320-List at Catalina320.com>
Reply-To: C320-List at Catalina320.com
Subject: Re: [C320-list] Boat Draft and Grounding (Wing Keel)

I have #847.  What do I win?
Dean Vermeire
Moonstruck II (#847)

BAdams3491 at aol.com wrote:
> My rudder comment is from looking at pictures of my boat sitting on  the 
> trailer prior to launching...nothing scientific.  Also, FWIW, Catalina  went 
> from the deeper wing to the shorter wing starting with hull #847, so now it  
> is the same keel as the wing on the C310.
>  
> Bert
> At Ease
> #442
>  
>  
> In a message dated 8/13/2010 2:29:20 P.M. Central Daylight Time,  
> dcnolte at mac.com writes:
>
> Careful  Bert, with the wing keel I believe that our rudders are  
> slightly  deeper than our keels, by several inches.
>
> At least mine is, and the  other 320s I have seen out of the water.
>
> So you need to exercise  special care if you ground, especially if you  
> try to turn to get  off. If you turn on your keel to get off and then  
> make contact with  the rudder and the bottom, you can damage the rudder.
>
> David  Nolte
> Beach House 4
>
>
> On Aug 13, 2010, at 3:14 PM,  BAdams3491 at aol.com wrote:
>
>   
>> Just my opinion, but I doubt the boat  draft would be  affected  
>> whether in
>> fresh or salt  water.  Might matter with the Queen  Mary, but I don't   
>> think it
>> would with our boats.
>>
>> If you have  looked at your wing keel, you can see it is quite wide,   
>>  and
>> that the keel is lower than the rudder.  Canting the hull to  the  
>> side  would
>> only serve to bury that side of  the wing in the bottom of the  
>> lake.   I have
>>  been aground only once in this boat, and that was not a 'hard'    
>> grounding.
>> I got off by making an immediate turn and  adding  power.
>>
>> Bert
>> At Ease
>>  #442
>>
>>
>> In a message dated 8/13/2010 2:00:37 P.M. Central  Daylight Time,
>> amiraults at sympatico.ca writes:
>>
>>  All:
>>
>> My sailing ground (Ottawa River above Parliament  Hill,  Ottawa  
>> Canada) is
>> experiencing historic low  water levels due to low  rainfall and last
>> winter's
>> low  snowfall. The result of this has been deep  keel boats unable to   
>> leave
>> harbour due to the risk of grounding at the   harbour entrance.  
>> Yesterday
>> afternoon on entering  harbour I gently bumped  the bottom at this  
>>  entrance
>> but did not get hung up. For the evening's  races I took  the same  
>> course in
>> and out as that morning's departure  and had  no problem; although  
>> all of the
>> crew was  at the bow to raise the stern a  bit in hopes that if I do  
>>  hit
>> bottom it will not be with the rudder.
>>
>> Two  questions. Bear's nominal draft with wing keel is 4'10''. I was    
>> asked
>> by
>> the club manager (when I reported the bump  with the bottom)  whether  
>> this
>> measurement was for  salt or fresh water. Would there be that  much  
>> of  a
>> buoyancy difference?
>>
>> My take on grounding is that  trying  to cant the hull to one side to  
>> float
>> her  off is a non-starter as this  would actually deepen the draft as   
>> the
>> wing
>> tilts down further into the  bottom. Is  there any reasonable hope of  
>> this
>> solution working by  tilting  the hull far enough over, or is a pull  
>> off  by
>> another boat the only  solution (bearing in mind that the area  has no
>> tugboat-like craft available  as this stretch of the river  is an  
>> inland
>> waterway)?
>>
>> I have yet  to  ground Bear, but if a grounding will leave her  
>>  stranded then
>> I
>> may have to  tie her up until we get  appreciable rainfall.
>>
>> Regards;
>>
>> Brian   Amirault
>> 797 Waltzing Bear,   too
>>
>>     
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