[Rhodes22-list] Inquiry on 130% genoa

Ronald Lipton ronald.lipton at gmail.com
Thu Nov 7 12:09:22 EST 2013 

OK, hull speed is defined as the speed at which the wave formed by the boat
itself has the same wavelength as the boat length, so the boat is 
effectively
trapped in a wave of it's own making.  A boat exceeding hull speed a 
boat is effectively
climbing the water wall caused by it's hull wave.  The rule-of-thumb 
formula
is true only for deep water waves, where there is a definite relation 
between
the wave propagation speed and it's wavelength.  In shallow water waves
move at a speed that is determined by the square root of the water depth so
the hull speed relation is no longer valid.

At 7 knots the wavelength is 27'. A 22' boat is about 1/3 of the way 
from the
trough. If the bow wave is 6" (just a guess) then we are lifting a boat 
weight
of 3000 lbs about  2" or about 500 ft-lbs of work.

Just sayin...

Ron


On 11/7/13 10:24 AM, R22RumRunner at aol.com wrote:
> Art,
> Hull speed is easily surpassed. It just takes a lot of ballast (crew),
> enough wind and a lot of rum.
> I spent last weekend down on St. Simons Island with Captain Bob Keller
> (Former Rhodes owner, Yankee Clipper) on his new to him Catalina 310. Had
> enough  wind to get his hull up to 8.3 which is faster than the rated hull speed
> for his  boat.
>   
> Rummy
>   
>   
> In a message dated 11/5/2013 4:48:49 P.M. Eastern Standard Time,
> cover-man at comcast.net writes:
>
> Think of  it, guys - what a terrible shame that with our infinite vigor and
> boundless  brilliance we are still confined to the hull speed.  We need
> some more  help from our fearless leader!
>
> Well,  back to a glass of Sherry in  the BR...
>
> Rummy, where are  you?
>
> Best,
>
> Art
>
>
> Have a nice day  !
>
> -------- Original message --------
> From: Charles Nieman  <blue66corvette at hotmail.com>
> Date: 11/05/2013  3:14 PM   (GMT-05:00)
> To: Rhodes List <rhodes22-list at rhodes22.org>
> Subject: Re: [Rhodes22-list] Inquiry on 130% genoa
>
> Ric, et  al;
> For the UPS, I have a seperate halyard that is there for whatever I  choose
> to hoist (ie flag, Christmas lights, UPS, etc) mostly is just bangs the
> mast like everyone else in the marina (I wouldn't want to be the only quiet
> boat on a breezy day :-)) I have found that while the UPS is self furling, it
>   has a tendancy to try to come out if you hoist it just to motor out or
> other  times, so I keep it laying on the fordeck until I am ready to deploy (if
> it is  anything over 5 knots I leave it in the bag since I know I won't be
> using  it)
>
> On the question about the furler, I am presuming you are asking  about the
> 130; and I cannot answer. I have never had the sail off the furling  tube (I
> have on the main, and that sail has the groove in the furling tube  that
> one inserts the sail into) and have not ventured to inspect while under  full
> sail to verify. I do know it has a luff rope cause I can see  it.
>
>> From: ric at steelbone.com
>> To:  rhodes22-list at rhodes22.org
>> Date: Tue, 5 Nov 2013 13:00:01  -0500
>> Subject: Re: [Rhodes22-list] Inquiry on 130% genoa
>>   
>> HI Charles
>> Thanks for your input
>> Personally I think a  130 and the UPS are a great combination for the
>> Rhodes  22.
>> Questions.
>> How do you hoist you UPS?
>> Do you have a  dedicated halyard or do you sue the topping lift?
>> Do you have a modern  roller furler with a luff groove?
>> Ric Stott
>> s/v Dadventure -  '84
>> Hampton Bays, NY
>>
>> On Nov 5, 2013, at 12:21 PM,  Charles Nieman wrote:
>>
>>> Art
>>> I had a 175 on my  old R22, I thought it was a great sail and
>>> probably used  too much of it when I should have reefed. I got a new
>>> to  me R22 that had a 130 and I seriously thought about changing to a
>>> 175 but the 130 was too new for my frugal nature to make that  move,
>>> plus the new boat also has a UPS for really light  air (the observed
>>> problem with the 175 was when you really  need that much sail, it is
>>> too heavy to work). I am so  pleased with the 130 and UPS, I will not
>>> be going back to  the 175 when these wear out (I also doubt the UPS
>>> will  wear out, since I only use it in very light air, which usually
>>   > means too hot to be out there, here in Texas).
>>>   Now I am on a Texas lake, and If you are thinking in regards to your
>>> Florida location, it may be totally different.
>>   >
>>> One man's opinion
>>>
>>> Charles
>>   > 98 R 22
>>> s/v Daydream
>>>
>>>> Date:  Tue, 5 Nov 2013 16:44:06 +0000
>>>> From:  cover-man at comcast.net
>>>> To: rhodes22-list at rhodes22.org
>>   >> Subject: [Rhodes22-list] Inquiry on 130% genoa
>>   >>
>>>> Guys,
>>>>
>>>> I am  contemplating getting the 130, but curious to get any feedback
>>   >> on your performance experience. Thx.
>>   >> Art
>>>>   __________________________________________________
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