- - - - - - - - - - - - - - - - - - - - - - - - - - -
West Wight Potter Mailing List maintainer
dfarrell@ridgecrest.ca.us
List hosted by www.tscnet.com
- - - - - - - - - - - - - - - - - - - - - - - - - - -
Very interesting.
Any problems with the shackle jamming in the slot?
I also wonder where exactly the shackle is attached on the aft edge
of the board. Further down would seem to give better mechanical
advantage for raising it. Higher up would seem to reduce drag and
jamming potential.
-----------
Rich Duffy
P-14 #362, "Manele"
Kula, Hawaii
> Bob
>
> I hadn't heard of your centerboard mod before, and it is intriguing.
> I'm forwarding your post to the WWP list because others are likely to
> be interested. It seems worthwhile to close the slot in the front of
> the centerboard trunk and to eliminate the "nose" of the centerboard
> sticking up in the cabin.
>
> Although my first generaton US Potter has the line cleated in the
> cockpit, I believe the newer Potters have the centerboard line cleated
> inside the cabin unless they have been modified. Also, mine doesn't
> have a bridgedeck but the centerboard trunk (centre-plate case)
> extends aft into the cockpit. I presume the "small exit hole" would be
> in the bridgedeck on the newer Potters or on the centerboard trunk
> extension on Manatee
>
> With your mod there would seem to be no need for a slot in the top of
> the trunk, which would eliminate the problem of water flowing in
> through the slot if the boat were swamped. The slot is also a safety
> hazard to fingers. (There was an instance of a child losing a
> fingertip at the aft end of the slot when the centerboard swung down
> suddenly.) A possible minor drawback would be the slight added drag or
> possible vibration of the underwater line, or does the line attach to
> the plate close to the bottom or even inside the trunk? Is any
> purchase needed to provide sufficient mechanical advantage?
>
> Another advantage would be that the line, if cleated, would support
> the centerboard if it should be knocked off its pivot pin. With the
> standard setup, the plate falls almost out of the boat before the
> tackle supports it. On the other hand, with your setup, uncleating the
> line when the plate is off the pin could allow the plate to fall away
> completely and be lost unless there is a stop knot in the line.
>
> Cutting the nose off the centerboard could actually improve stability,
> it seems to me, since the center of gravity of the plate will be
> lower.
>
> Regards,
> Harry
> P14 #234, Manatee
> Mountain View, CA
>
> >Date: Thu, 30 Mar 2000 12:47:38 +0100
> >From: Bob Morrison <solent@sealord.screaming.net>
> >Subject: My 'A'type Potter.
> >To: Harry Gordon <hlg@pacbell.net>
> >MIME-version: 1.0
> >X-MSMail-Priority: Normal
> >X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200
> >X-Priority: 3
> >
> I would like to mention an adaptation which had been made to my 'B'
> type by the previous owner which proved to be extremely worthwhile and
> yet, although showing it to many other Potterers, no-one ever took it
> up !. I assume your US Potters have the same open centre-case in the
> cabin with a 'nose'-type extension on the top of the centre-plate
> which has a tackle for up and down- haul, led through the
> 'bridgedeck' to a cleat aft of the centre-board case in the cockpit
> ?. If this is the case, and similar to the UK Potters, then this idea
> may interest some of your members as it completely solves the problem
> of the wet stuff splashing up through the open case and soaking the
> cabin. Of course, this idea may not be new to you and I don't want to
> sound like I'm 'teaching Grandma to suck eggs' but I'll mention it
> anyway - just in case !.
>
> The centre-plate had been adapted by the simple method of sawing off
> the
> 'nose' and covering the slot of the case with blanking pieces sealed
> with appropriate waterproof sealer. Now, if you imagine the
> centre-plate hanging vertically underwater - a hole was drilled at
> the aft edge of the plate to take a small shackle which had a line
> attached leading up through a small exit hole with a block leading aft
> to be cleated off in the cockpit somewhere. Old Jack, who I purchased
> the boat from, and was the acknowledged Potter Wizard of the Dinghy
> Cruising Association (and who was I to argue with him !), reckoned
> that as he kept the 12v battery at the base of the mast anyway, its
> weight would make up more than the weight removed from the
> centre-plate. Well, this idea worked perfectly and I continued for
> years with his idea. There was no lack of ballast problem and I
> certainly did not notice any reduction in sailing qualities plus more
> space and a much drier cabin. Please let me know if this is a new
> idea to your group - I can vouch for its usefulness.
>
> Yes, I did read about your friend seeking plans for Potter home build.
> Old Jack told me this was a perennial problem with which he was
> plagued for many years as the rights to reproduce the design were
> well-guarded. The new 'E' type which is being marketed (at a
> ludicrous price, I must say) by David Keffen who may be able to
> assist him - although I do not know David personally. Hope the above
> may prove useful to somebody. Its getting warmer and I will hit the
> wet stuff this weekend with a cruise to Bembridge on the Isle of
> Wight.
>
> Cheers. Bob.
>
>
>
This archive was generated by hypermail 2b29 : Fri Mar 31 2000 - 03:27:13 PST