[Rhodes22-list] Ballast ?

[John Shulick]

Lee,

 Running before the wind I can get a 1/2knt increase (confirmed by GPS) by
retracting the board.

JohnS



Leland wrote:
> 
> John,
> 
> What the heck--go for it.  As long as you can easily change things back if
> they go awry there's not much risk and the results might be interesting.
> 
> You got me thinking about the slot.  If the centerboard is in the up
> position the slot is mostly covered.  If the lowered centerboard itself
> creates some drag I wonder how much more is caused by the slot.  I love my
> centerboard but I'm still convinced that it can slow you down in those
> reach conditions where the stubby keel provides enough of an opposing
> force against the sails.
> 
> Good luck!
> 
> Lee
> 
> 
> 
> John Shulick 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
>> 
>> 
>> 
> 
> 

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