[Rhodes22-list] Ballast ?

Tue Jan 24 07:17:23 EST 2012

I have also noticed comments that the R22 sails better with its water tank full.  Which is 15 gallons (120 pounds) under the v-berth.  I once had an 18' microcruiser that woulnt tack without considerable weight forward.
We will have to experiment.

On Jan 23, 2012, at 10:36 PM, John Shulick <jsbudda at verizon.net> wrote:

> 
> I see your point and will try this prior to drilling holes 
> 
> 
> Spreadgoodnews wrote:
>> 
>> I think this does work pretty well.  The watertribe, everglades challenge
>> people do some pretty cool stuff.  The sea-saw analogy is close, but
>> weight above waterline has more effect than weight below waterline when
>> heeling the windward weight will be clear of the water. Plus i am talking
>> about putting it way out on the sides of the hull.  Centerline weight
>> offers little righting moment until a certain amount of heel is present. 
>> This is part of the reason twin keel boats  are very very stable.
>> 
>> 
>> 
>> On Jan 23, 2012, at 10:15 PM, John Shulick <jsbudda at verizon.net> wrote:
>> 
>>> 
>>> Goodnews,
>>> 
>>> Thought experiments are good way to pass the time till sailing season
>>> begins. The daggerboard with a torpedo would require extensive trunk
>>> modification and some inventive engineering not to mention serious
>>> dollars
>>> which I can't allocate for now. I have a rough design in my head but
>>> still
>>> need to solve a few problems before going that far. The first thing to do
>>> is
>>> close the slot temporarily with a plastic strip with the centerboard down
>>> and measure performance. I will do that when the water warms enough to go
>>> swimming this year. I understand your idea of moving the extra weight out
>>> to
>>> the sides but wouldn't equal weight placed there cancel out? Picture a
>>> see
>>> saw with a 100 kid on each side. If I put the ballast inside it would be
>>> along the centerboard trunk so when the boat begins to heel the gravity
>>> will
>>> try to re center the boat. Bolting the ballast to the bottom of the keel
>>> gives a 2' mechanical advantage. Putting holes in the shoal keel and
>>> sealing
>>> them are not a big deal to me, I worked in the swimming pool business for
>>> 30
>>> yrs. so I am wise to water and its ways. Actually a boat is novel to me I
>>> always had to keep the water in something now I'm trying to keep the
>>> water
>>> out of something. Ironic really.
>>> 
>>> John S
>>> 
>>> 
>>> Spreadgoodnews wrote:
>>>> 
>>>> I like your cognitive rumination.  I like your idea to play with some
>>>> extra ballast.  Having a torpedo centerboard with the weight would be
>>>> good
>>>> because you can reverse it by putting your 70# diamondboard back in. 
>>>> But
>>>> you may need to add a winch and some stainless cable to lift a 200#
>>>> board.
>>>> As an alternative, try the physics of this idea.  In fact its not my
>>>> idea
>>>> but was on one of the participants of everglades challenge.  Put the
>>>> weight equally divided on each side.  Under the port settee and under
>>>> the
>>>> galley against the hull outside the fore and aft stringers, not
>>>> centerline.  Use coated lead shot weights like ankle weights or dive
>>>> weights.  The idea is that as the hull heels you cantelever the weight
>>>> out. The rhodes hull shape would make this work exceptionally well to my
>>>> eye.
>>>> 
>>>> 
>>>> 
>>>> On Jan 21, 2012, at 9:14 PM, John Shulick <jsbudda at verizon.net> wrote:
>>>> 
>>>>> 
>>>>> Slim, Lee, Goodnews,
>>>>> 
>>>>> I understand that I may not gain much and that I may end up removing
>>>>> them
>>>>> a
>>>>> week after putting them on but how do you figure 200 lbs ballast would
>>>>> court
>>>>> a potential catastrophe ? I have considered putting the weight in the
>>>>> hull
>>>>> but bolting it to the bottom of the shoal keel would add considerable
>>>>> mechanical advantage over just sticking it under the floorboards. I was
>>>>> mistaken in my calculation of increase in whetted area it should have
>>>>> been
>>>>> 288 sq/in or ~ 2 sq/ft still just not that much IMO. It would be like
>>>>> having
>>>>> an extra invisible crew member who always knows when to switch sides.
>>>>> If
>>>>> 200lbs of ballast is such a radical mod, here's another thought. How
>>>>> about
>>>>> chucking the swing centerboard and replacing it with a retractable
>>>>> dagger
>>>>> board with a lead torpedo at the bottom? That would eliminate the open
>>>>> slot
>>>>> in the hull which I believe to be a major drag component. Phillip
>>>>> Rhodes
>>>>> did
>>>>> not design boats in the modern era of computer modeling and space age
>>>>> materials. I wonder how he would build the R22 today ? 
>>>>> 
>>>>> Tinkerers of the world UNITE !
>>>>> 
>>>>> JohnS
>>>>> 
>>>>> 
>>>>> -- 
>>>>> View this message in context:
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>>>>> Sent from the Rhodes 22 mailing list archive at Nabble.com.
>>>>> 
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>>>> 
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>>> 
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> 
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