[Rhodes22-list] deck mounted chain plates

[The Rhodes 22 Email List]

Graham:  Please don't dispare!  We have enjoyed hearing your adventures in the past and look forward to more in the future.  😀

Bob in sunny Florida.  R22 "NoKaOi"

Sent from my iPad

> On Jan 11, 2015, at 8:56 AM, The Rhodes 22 Email List <rhodes22-list at rhodes22.org> wrote:
> 
> Thanks Dennis. However, the question related to the maximum tension that the
> chainplates would need to withstand in use rather than the matter of tuning
> the rig. I just don't want to use deck mounted chainplates that are not
> sufficiently strong. That said, your reference to tension gauges will be
> helpful should my boat ever see water again.
> 
> Graham Stewart
> 
> 
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of The Rhodes 22 Email
> List
> Sent: January-10-15 9:18 PM
> To: 'The Rhodes 22 Email List'
> Subject: Re: [Rhodes22-list] deck mounted chain plates
> 
> Graham,
> 
> The idea is to set the rig tension while the sails are down / furled. Take a
> look midway down the page at http://loosnaples.com/how-tos/tension-gauges to
> see Loos' suggested variation in shroud tension as the boat heels. I suspect
> something similar happens in the forestay / backstays.
> 
> The picture shows that a rig that's too loose loses all support in the
> leeward shrouds, and notes that "The lateral stiffness of the mast and the
> fore and aft stiffness of the spreaders is reduced by a factor of 2 when the
> leeward shrouds go slack".
> 
> Dennis
> Magic Moments
> Wondering if rig tension should be reduced in sub-zero temps.
> 
> 
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of The Rhodes 22 Email
> List
> Sent: Saturday, January 10, 2015 8:52 PM
> To: 'The Rhodes 22 Email List'
> Subject: Re: [Rhodes22-list] deck mounted chain plates
> 
> Dennis:
> 
> That is very helpful. Thanks. I would have believed you if you said the
> tension was thousands of pounds. Am I correct that the tension gauge would
> give the tension when the rig is at rest and that it might increase
> substantially in actual use - particularly when healing?
> 
> Graham Stewart
> 
> 
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of The Rhodes 22 Email
> List
> Sent: January-10-15 8:42 PM
> To: 'The Rhodes 22 Email List'
> Subject: Re: [Rhodes22-list] deck mounted chain plates
> 
> I know the use of Loos gauge data is against Rummy's religion, but...
> 
> Take a look at http://loosnaples.com/how-to-use-pt-series-tension-gauges and
> you'll see the suggested tension for a 1 x 19 stainless steel 1/8" in
> diameter is 240 pounds. The Loos guide goes on to say "In some rigs it may
> be advantageous to carry a bit more tension in the uppers than the lowers".
> Sooo... figure 240 pounds in the lowers.
> 
> Given that Loos suggests that a 1/8" forestay should carry 320 pounds of
> tension, and that my forestay is secured with a 3/16" pin, I'd guess is that
> your bracket should work for the lowers. Give some consideration to the size
> of the backing plate you'll use though.
> 
> Dennis
> Magic Moments
> The glaciers have advanced back down the Detroit River. Aarrrg!
> 
> 
> 
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of The Rhodes 22 Email
> List
> Sent: Saturday, January 10, 2015 7:04 PM
> To: 'The Rhodes 22 Email List'
> Subject: [Rhodes22-list] deck mounted chain plates
> 
> During the rebuild of Agile I removed the chainplates for the lower shrouds
> with the intention of placing external chain plates on the cabin sides.
> Subsequently I changed the design doe the windows such that I now need to
> install deck mounted chainplates on the cabin top. Finding the right
> hardware has turned out to be a challenge. I found something that looks
> close to what I need but am unsure about its suitability - see attached.
> Given that the old chainplates were fairly thin tangs that were bent around
> the cabin deck core it would seem that this hardware is more than sufficient
> for the purpose but thought I would check the list to see if anyone has an
> opinion on these or  an alternative suggestion. Does anyone have a clue what
> load the lower stays place on the boat?
> 
> Graham Stewart
> 
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