[Rhodes22-list] centerboard attachment

[cjlowe at sssnet.com]

I have a different take on some of these issues, don't know if I'm right,
probably just a different take. I think I remember someone on the list
saying the pcv pieces slide on each side of the cb pin and act as a
sacrificial bushing , so the stainless steel pivot pin doesn't eat out the
fiberglass in the side and bottom of the grove. Hope I didn't dream that,
because I spent a lot of time making them bushings, mine didn't have them.
  I'm not sure trying to limit the cb's vertical movement is the best
idea. I'm thinking anything you put in the channels has a chance of
falling out and jambing the cb travel. Anything hard screwed in the
channels has a good chance of tearing big holes in the cb trunk and
taking out both sides of the cb cap. If you think fixing the cb cap was
a pain, ask Lou how much fun it is to do repairs inside the centerboard
trunk.
  I'm thinking the best bet is to not anchor/moor in shallow water, don't
motor backward in shallow water, and NEVER EVER splash the boat unless
the cb pendant is cleated with the cb in the UP position. Any other ides
on this are more than welcome.

    Jerry



> 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/Getaway1.jpg
> http://www.rhodes22.org/pipermail/rhodes22-list/attch/200507/14/Getaway2.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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