[Rhodes22-list] centerboard attachment

Fri Mar 7 14:57:46 EST 2014

I would be reluctant to glue something into the channels. The rigid PVC that
was in my channels, probably since the beginning, obviously stayed in place
without glue. The end that touched the pivot pin was damaged, however,
suggesting that a sharp upwards force had been applied at some point. The
idea of lengths of garden hose appeals to me as it would hold the CB down
but give a bit of a bumper effect if the CB were to be pushed up violently. 

Stan's point about keeping the keel slightly to the aft makes sense.  

It would be nice to know whether PVC pipe, garden hose or anything else was
ever used in the channels and what, if anything is used now.

Graham 

-----Original Message-----
From: rhodes22-list-bounces at rhodes22.org
[mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Ric Stott
Sent: March-06-14 6:47 PM
To: The Rhodes 22 Email List
Subject: Re: [Rhodes22-list] centerboard attachment

AH HA!
A Picture's worth 1000 words.
The pivot pin lives at the bottom of the vertical channels.
On Graham's boat, someone, Stan or a retrofit job, installed pvc stops to
prevent the CB from rising and hitting the cap if (when) aground.
Although it is less likely, the stops could damage the cap as well.
A straight on grounding would not cause damage because the CB simply swings
back. But if the CB was in the down position and the boat came down on the
ground, as it could in big waves, or if the tide went out.  
the CB will sooner or late ride up the channels and hit the cap - CRACK!
Unless the CB  needs to have some play to function smoothly, which doesn't
seem necessary based on Grahams pvc stops, its a good idea to install
something to prevent it from rising. What doe Stan use these days?
I'm thinking hard rubber, glued in, but might interfere with a smooth
operation if it was challenged and came loose.

On another related note, I've seen emails pertaining to caulk on the gasket.
As a cyclist, I glue rubber racing tires on rims with special glue.
I think tis basically rubber cement.
These tires are called 'tubulars'. They are kind of a tire and tube in one,
and glued onto the rim as opposed 'clincher' type tires.
It comes off to change the tire, but not easy, and the glue can be cleaned
off.  Seems like the prefect solution for this application.  
Has anyone tried that?

Ric
Dadventure
Hampton Bays

On Mar 6, 2014, at 5:41 PM, Graham Stewart wrote:

> I have changed the title of this exchange as it appear the topic has 
> morphed from the matter of the mast post base to the question of how 
> the centreboard is attached and how this might result in damage to the 
> cap if the centreboard is not held in the up position when launching.
>
> My centreboard pivot pin rides in two vertical channels in the housing 
> that are about 5" long. Those grooves are very clear in the second 
> photo that Rob Lowe just posted. As I saw it, the channels would allow 
> the pin to be dropped down to the proper position without the need to 
> insert the pin from the outside of the housing.  It now occurs to me  
> that this design might also have been intended to allow the pivot pin 
> to rise up inside the housing should the centreboard hit something. 
> Makes sense although perhaps not if this would allow the centreboard 
> to damage the cap.
>
> In my case two length of .5 inch rigid PVC  pipe were placed in each 
> channel above the pin. It appears that these pipes were intended to 
> prevent the pin from rising up. As I mentioned earlier, I was pretty 
> sure that the cap had never been removed and assumed, therefore, that 
> the pieces of pipe were part of the original design. Now I am 
> beginning to wonder if this was some kind of retrofit by a previous 
> owner who, perhaps, was responding to damage caused when the 
> centreboard was pushed into the cap.
>
> I am inclined to leave the pieces of pipe out when I reinstall the 
> centreboard or perhaps search for something that might act as a shock 
> absorber but still allow the board to raise up if it hits a solid 
> object.
> Perhaps shorter lengths of flexible plastic tubing would work.
>
> Has anyone else found a similar arrangement in the pivot pin channel?
> Any thoughts?
>
> Graham
>
>
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Lowe, Rob
> Sent: March-06-14 3:13 PM
> To: The Rhodes 22 Email List
> Subject: Re: [Rhodes22-list] Searching the archives and settled step
> >now
> mast step cb leak
>
> It seems like there are various versions of CB and the lift systems.  
> Here are some photos that someone (I forgot who, sorry!) posted of 
> their CB taken apart. - rob
>
> http://www.rhodes22.org/pipermail/rhodes22-list/attch/200507/14/Getawa
> y1.jpg 
> http://www.rhodes22.org/pipermail/rhodes22-list/attch/200507/14/Getawa
> y2.jpg
>
>
>
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Ric Stott
> Sent: Thursday, March 06, 2014 2:00 PM
> To: The Rhodes 22 Email List
> Subject: Re: [Rhodes22-list] Searching the archives and settled step
> >now
> mast step cb leak
>
> Thanks Graham
> It might have been cracked when they loaded it onto a trailer to 
> launch last spring and delivered it to me.
> It was a transport trailer.
> Sam replied that the pendant had to be cleated when trailered, or it 
> would cause a crack.
> I'd like to understand the mechanics of that reply.
> Is the top or aft edge of the CB that close to the cap, and what 
> component would allow it to move vertically, a hinge pin?
> Is there a CB diagram anywhere?
> I think it was leaking, but very little until later in the season then
> - after a storm, it got much worse.
> The boat may have been on the bottom or bounced on the bottom at a 
> very low tide.
> I'll take it apart when it warms up.
> Pendant - Braided nylon is very stretchy - is that what we want?
> Ric
>
> On Mar 6, 2014, at 1:24 PM, Graham Stewart wrote:
>
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