[Rhodes22-list] Re design of Rhodes Interior and elimination of compression post.

[John Shulick]

Rick,

 It is my thought that the force required to flatten that arch would mean
the standing rigging is way to tight but I will measure the arch deflection
and the distance between the bulkheads both before and after stepping the
mast to check for distortion. Last year I had 250 lbs of force on the side
stays and 100 on the baby stays as measured by the infamous Loos gage.
Delilah goes in the water May 15 so I'll
keep everyone informed.

John S


Blue Heron wrote:
> 
> John,
> 
> Unlike your stringer, the one in my '93 model in about the same place is
> not
> supported directly by the keel.  So in your case, the bulkheads supporting
> the arch should transfer compression from the mast to the keel through the
> stringer.
> 
> However, I do have a concern that if the mast compression causes your arch
> to straighten out, the arch would force the bulkheads outward, causing the
> hull and cabin roof to deform.  That's the same risk I face by having
> stepped a compression post on my unsupported stringer.
> 
> Rick
> 
> On Sun, Apr 12, 2009 at 9:59 PM, John Shulick <jsbudda at verizon.net> wrote:
> 
>>
>> Hi Rick,
>>
>>  It is my understanding that putting a load in the center of the arch
>> would
>> try to flatten the arch out which would transfer the load to the corners
>> of
>> the bulkheads. those bulkheads were cut using the original wall which I
>> removed in one piece and am saving just in case. They fit flush to the
>> cabin
>> interior. The starboard bulkhead is sitting directly on the original
>> stringer (see first pict) the port side is offset by 1/4" because the
>> bench
>> seat rests on that side and is held by screws. any additional load is
>> also
>> carried to the keel by the 1x2 hard wood boards that look like trim
>> pieces.
>> To install the arch I had to first wedge it into one of the corners and
>> then
>> use a piece of wood ( the original post worked quite well) and pre load
>> the
>> cabin ceiling. Once you have the other end held up you CAREFULLY use a
>> SMALL
>> hammer to slide the arch into place. The arch is held in place by that
>> tension and although there are no screws I can't budge it and I am a
>> strong
>> person. I feel pretty confident that when the mast is up and the rigging
>> tightened the whole thing should tighten up even more. Note: IF the
>> bulkheads were extended all the way into the corners where the hull and
>> deck
>> meet AND then glassed in you could then shorten the the spreaders on the
>> mast and the stays could be moved to the cabin top attaching through the
>> roof and directly to the bulkheads. That would allow a genoa track to be
>> installed in the corner where the deck and cabin wall meet allowing
>> higher
>> pointing ability. The bulkheads would transfer the heeling forces and the
>> cabin roof would not carry the load. But I'm not ready to try that yet.
>>
>> Best
>> John S
>>
>> Blue Heron wrote:
>> >
>> > Hi John,
>> >
>> > Your pictures show some nice wide open spaces.  However, it is hard to
>> > tell
>> > where the downward load on the arch goes.  Are the the bulkheads or
>> "half
>> > walls" supporting the arch supported by a stringer or perhaps a direct
>> > path
>> > the the keel?
>> >
>> > Rick
>> >
>> > On Sun, Apr 12, 2009 at 12:41 PM, John Shulick <jsbudda at verizon.net>
>> > wrote:
>> >
>> >>
>> >> Hi everybody,
>> >>
>> >>  Over the last season I decided to change the interior of my 71 rhodes
>> to
>> >> reflect the way my wife and I use the boat. We are not small people
>> and
>> >> found the original Layout to be hard to move around in when cabin
>> bound
>> >> by
>> >> weather. As we get on the boat friday nights and don't return to the
>> dock
>> >> until sunday afternoons we found the six foot nose birth a bit
>> cramped.
>> >> Also
>> >> as the early rhodes did not have a fixed head we had a hallway with
>> >> little
>> >> purpose and a wall extending halfway across the the boat to little
>> >> purpose
>> >> except to act as a compression post for the mast. During the past few
>> >> weekends I added a 2 ft. extension to the bow bed replaced the cabin
>> >> floor,
>> >> installed new carpeting and removed the original wall replacing it
>> with
>> 2
>> >> half walls and a compression arch over the cabin ceiling to accept the
>> >> mast
>> >> load. The arch you see in the following pictures is 1/2 in spring
>> steel
>> >> custom bent in a 100 ton press (I do live in Pgh. after all) I stood
>> on
>> >> the
>> >> arch before I installed it and my 280 lbs. did not even make it flex.
>> I
>> >> feel
>> >> pretty confidant it will work but will keep all informed in the event
>> of
>> >> failure. Enclosed are before and after shots.
>> >>
>> >> John Shulick
>> >>
>> http://www.nabble.com/file/p23012525/johns%2B2007%2Bhome%2Bpics-058.jpg
>> >>
>> http://www.nabble.com/file/p23012525/johns%2B2007%2Bhome%2Bpics-054.jpg
>> >> http://www.nabble.com/file/p23012525/DSCF0257.jpg
>> >> http://www.nabble.com/file/p23012525/DSCF0258.jpg
>> >> http://www.nabble.com/file/p23012525/DSCF0259.jpg
>> >> http://www.nabble.com/file/p23012525/DSCF0260.jpg
>> >> http://www.nabble.com/file/p23012525/DSCF0261.jpg
>> >>
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