itmore via CnC-List <
>> cnc-list@cnc-list.com> wrote:
>>
>>> I'd love to see that as well Josh.
>>>
>>> Thanks!
>>>
>>> Bruce Whitmore
>>>
>>> (847) 404-5092 (mobile)
>>> bwhitm...@sbcglobal.net
>>>
>> *From:* Josh Muckley via CnC-List
>> *To:* C List
>> *Cc:* Josh Muckley
>> *Sent:* Friday, August 3, 2018 10:22 AM
>> *Subject:* Re: Stus-List 37+ Backstay tension
>>
>> With that info I'll head down to my boat and apply various psi
> I'd love to see that as well Josh.
>
> Thanks!
>
> Bruce Whitmore
>
> (847) 404-5092 (mobile)
> bwhitm...@sbcglobal.net
>
>
> --
> *From:* Josh Muckley via CnC-List
> *To:* C List
> *Cc:* Josh Muckley
> *Sent:* Friday, Au
I'd love to see that as well Josh.
Thanks!
Bruce Whitmore
(847) 404-5092 (mobile)
bwhitm...@sbcglobal.net
From: Josh Muckley via CnC-List
To: C List
Cc: Josh Muckley
Sent: Friday, August 3, 2018 10:22 AM
Subject: Re: Stus-List 37+ Backstay tension
With that info I'll head
°º¤.
> Tom & Lynn Buscaglia
> SV Alera
> C 37+/40
> Vashon Island WA
> (206) 463-9200
> www.sv-alera.com
>
>
>
> At 07:31 AM 8/3/2018, you wrote:
>
> Message: 1
> Date: Fri, 3 Aug 2018 10:20:55 -0400
> From: Gary Russell
> To: "C List"
> S
e:
>
>> Message: 1
>> Date: Fri, 3 Aug 2018 10:20:55 -0400
>> From: Gary Russell
>> To: "C List"
>> Subject: Re: Stus-List 37+ Backstay tension
>> Message-ID:
>>
>> Content-Type: text/plain; charset="utf-8"
>>
&g
m Buscaglia
>> S/V Alera
>> 1990 C 37+/40
>> Vashon WA
>> P 206.463.9200
>> C 305.409.3660
>>
>>
>> On Aug 3, 2018, at 4:59 AM, cnc-list-requ...@cnc-list.com wrote:
>>
>> Message: 3
>> Date: Thu, 2 Aug 2018 22:07:57 -0300
>> From
Josh,
Great! I would be most interested in the displacement of the
hydraulic RAM vs. the Loos gauge tension, since I don't have a working
pressure gauge:
What would be most interesting to me, would be a table like:
Pressure Loos Gauge Displacement of the RAM in inches
With that info I'll head down to my boat and apply various psi to the
hydraulics and then measure the tension with my loos gauge.
Josh
On Fri, Aug 3, 2018, 10:17 AM Gary Russell via CnC-List <
cnc-list@cnc-list.com> wrote:
> So... I went over to Kaylarah this morning and found the following:
>
ent points I okay with that.
>
> Tom Buscaglia
> S/V Alera
> 1990 C 37+/40
> Vashon WA
> P 206.463.9200
> C 305.409.3660
>
>
> On Aug 3, 2018, at 4:59 AM, cnc-list-requ...@cnc-list.com wrote:
>
> Message: 3
> Date: Thu, 2 Aug 2018 22:07:57 -0300
> From: K
So... I went over to Kaylarah this morning and found the following:
The back stay diagonals are 235" long
The spread between the attachments is 80"
Doing the math, that means if the maximum tension on the vertical rod is
5000 lbs., then the tension on the diagonals is 2537 lbs.
>From here you
ote:
>
> Message: 3
> Date: Thu, 2 Aug 2018 22:07:57 -0300
> From: Ken Heaton
> To: cnc-list
> Subject: Re: Stus-List 37+ Backstay tension
> Message-ID:
>
> Content-Type: text/plain; charset="utf-8"
>
> Interesting. All parts of our backstay are
Interesting. All parts of our backstay are rod, the double lowers and the
single upper. The upper is a larger diameter (as you would expect). Two
hydraulic rams, one each side.
Some of you have wire for the lower section?
Ken Heaton & Anne Tobin
S/V Salazar - Can 54955
C 37/40 XL - Hull # 67
Actually, if you look closely at the manual, you will notice that the
4125 lbs. refers to "wire limit", and 5000 lbs. refers to "rod limit".
Since the vertical part of the back stay assembly is rod, I will assume
that the 5000 lbs. refers to the vertical. I will go over to the boat
tomorrow
Absolutely without any doubt in my mind the backstay tension of 4125 is to
be measured on the mainline. This works in opposition to the head stay
which is equally sized #12 rod.
Josh
On Thu, Aug 2, 2018, 8:41 PM Gary Russell via CnC-List <
cnc-list@cnc-list.com> wrote:
> Hi Josh,
> Oops!
Hi Josh,
Oops! I missed that. I looked in the chapter about rigging and
didn't find it there. Silly me! I even searched for the number 4125 and
found nothing. I guess the document is an image rather than text. Now the
question, is that the tension in the vertical part of the back stay?
Page 68 of the manual pdf file which I linked before has the pre-load and
max load limits.
Again I am corrected in my preconceived notions regarding the correlation
between a hydraulic gauge and the tensile load on the back stay.
Josh
On Thu, Aug 2, 2018, 8:13 PM Gary Russell via CnC-List <
Dennis,
I agree, and have a "calibrated" batten on mine as well, but I still
need the designer to tell me when I am exceeding the design limits of the
hard point where the back stay attaches to the transom.
Gary
S/V Kaylarah
'90 C 37+
East Greenwich, RI, USA
~~~_/)~~
On Thu, Aug
I never go by lbs, psi, whatever. What matters is sail shape and forestay
sag (or lack thereof). I have a small dinghy batten taped to the AFT side
of the cylinder of the backstay adjuster. On the batten are small wraps of
green, yellow, red and black tape. These are positioned so the fitting
Hi Josh,
Where did you find the 4125 or 5000 lb. limit? I don't see that in
the Owners Manual? Is the 4125 lb. limit for the lower angled segments of
the the back stay or the upper vertical part. You can't simply measure the
port back stay tension and multiply by two, because of the angle
The manual says limit to 4125lbs and then says absolute max of 5000lbs.
https://drive.google.com/file/d/0B8pEh5lnvP1ySXFBdDhrX0ZaMzNnazViYkZzRVRoODlSSUd3/view?usp=drivesdk
I never considered that the hydraulic pressure psi could/would be
independent of tensile load. When I had my hydraulic pump
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