Cutting the keel??? - SailNet Community
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post #1 of 20 Old 03-31-2010 Thread Starter
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Cutting the keel???

Is this really done? Is it even remotely cost effective? How bad does it mess with a boat's performance?
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post #2 of 20 Old 03-31-2010
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Why on earth would you ever want to cut a keel? If much weight is taken off the boat will not be able to stand up to its sail area as designed. If a boat was to be so modified it should be after a redesign by a respected naval architect.
Cost effective? How?

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Last edited by mitiempo; 03-31-2010 at 06:52 PM. Reason: add
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post #3 of 20 Old 03-31-2010
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yet many older center board/drop keel cruisers have the slot filled in because the owners don't/won't/can't/don't know how to deal with it. Which to me translates as the same thing.

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post #4 of 20 Old 03-31-2010
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Yes it has been done.
check out there links...
MarsKeel Technology Keel Draft Reductions

http://www.marskeel.com/fckeditor/us...ng%20World.pdf

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post #5 of 20 Old 03-31-2010
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CSY 44s were designed to be able to slice off the bottom foot of the keel.

The idea was after they were finished chartering they could have their draft reduced for Florida / Bahamas sailing.
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post #6 of 20 Old 03-31-2010
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Peter
Shortening a keel and bolting on torpeedo shaped lead to it is a lot different than just cutting 500 or 1000 lbs off. As well with shallower draft there would have to be more ballast than there was originally in a deeper keel to maintain the same stability.

Denise
Eliminating an unballasted centerboard will affect pointing ability but not stability. If it is a heavily ballasted centerboard that is removed it will change stability. If the ballasted board is just kept in the slot it is no different than forgetting to lower it. While not as low the weight is still there.

TQA
The key word is "designed".

jwreck
Exactly what are you planning to do?

Brian
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Last edited by mitiempo; 03-31-2010 at 07:27 PM. Reason: add
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post #7 of 20 Old 03-31-2010
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Quote:
Peter
Shortening a keel and bolting on torpeedo shaped lead to it is a lot different than just cutting 500 or 1000 lbs off. As well with shallower draft there would have to be more ballast than there was originally in a deeper keel to maintain the same stability.
It says the exact same thing in the second link I posted.

For obvious reason you can't cut off 500-1000lbs of lead off your keel without adding a bulb... But it's possible to reduce draft.

I hate storms, but calms undermine my spirits." - Bernard
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post #8 of 20 Old 03-31-2010
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Which leaves us wondering exactly what jwreck has in mind. His question was pretty vague.

Brian
Living aboard in Victoria Harbour
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post #9 of 20 Old 03-31-2010
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my 83 hunter 27 is a shoal keel the keel weighs 3300 lbs and my draft is 3'3" the true fin keel is a foot deeper and 200 lbs lighter

just for comparison

less depth more weight to offset the leverage the keel has lost with length
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post #10 of 20 Old 03-31-2010
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Exactly right, scotty. The same with my CS27 deep vs shoal and any other design I know of.

Brian
Living aboard in Victoria Harbour

Last edited by mitiempo; 03-31-2010 at 08:56 PM. Reason: add
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