[Rhodes22-list] Pictures and details

Hank hnw555 at gmail.com
Mon Oct 25 22:44:29 EDT 2010


He's a rhodie.  Just hasn't posted since '08 that I can see.

Hank

On Mon, Oct 25, 2010 at 10:12 PM, Michael D. Weisner <mweisner at ebsmed.com>wrote:

> Does anyone know who Lynn Hoffman is?  Is thhis a spammer?
>
> ----- Original Message -----
> From: "Lynn Hoffman" <drfood55 at gmail.com>
> To: "The Rhodes 22 Email List" <rhodes22-list at rhodes22.org>
> Sent: Monday, October 25, 2010 8:07 PM
> Subject: Re: [Rhodes22-list] Pictures and details
>
>
> On Mon, Oct 25, 2010 at 7:15 PM, Michael D. Weisner
> <mweisner at ebsmed.com>wrote:
>
> > Hi Bill,
> >
> > It may be interesting to note that this is a problem that was addressed
> by
> > Stan in the original design of the centerboard.  Probably before yours
> was
> > modified by a previous owner, the lift points on the centerboard were not
> > fancy blocks but rather fixed stainless tubes between pieces of medium
> > duty
> > stainless plates that were attached to the board (through bolted pairs of
> > plates.)  The plates were probably Dwyer DH 72-5 Shroud Tangs (5" x 1" x
> > 5/64").  Nothing rolled but the line slid on the fixed tubes well.  Due
> to
> > the duty cycle, abrasion was not an issue.  I never worry about the block
> > being off-center and hitting the cap or jamming since it is fixed.
> >
> > I wish I had a photo.
> >
> > Mike
> > s/v Shanghai'd Summer ('81)
> > Nissequogue River, NY
> >
> > From: "BillyDoc" Sunday, October 24, 2010 2:31 PM
> > >
> > > Ouch! I wish I had thought of that before putting in those fifty bolts.
> > > You
> > > are exactly right, of course.  The next time I have it apart I will
> > > definitely de-articulate the blocks with some epoxy putty.
> > >
> > > Thanks for pointing that little problem out!
> > >
> > >
> > >
> > > Geankoplis wrote:
> > >>
> > >> Hi Bill,
> > >> Nicely done.  Well engineered, well thought out and great detailed
> > >> information on materials.  There is one concern.  Having owned a
> couple
> > >> of
> > >> Rhodes for  pretty much the last 34 years there is a potential problem
> > >> that
> > >> I ran into. This involved an articulated rather than a fixed block.
>  On
> > >> the
> > >> off chance you run aground the articulated block without the tension
> of
> > >> the
> > >> pennant will flop sideways and will probably jamb in the centerboard
> > >> trunk
> > >> or without the plates simply  break off a bit of the trailing
> > >> fiberglass
> > >> edge of the centerboard. It happened to me twice before I figured it
> > out.
> > >> Next time you go into the centerboard you may consider fixing the
> > >> blocks
> > >> so
> > >> they can't move left or right, er, port and starboard matey.  Hope
> this
> > >> helps.
> > >> Chris Geankoplis
> > >>
> > >> -----Original Message-----
> > >> From: rhodes22-list-bounces at rhodes22.org
> > >> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of BillyDoc
> > >> Sent: Sunday, October 24, 2010 8:53 AM
> > >> To: rhodes22-list at rhodes22.org
> > >> Subject: [Rhodes22-list] Pictures and details
> > >>
> > >>
> > >> I got the centerboard back in the boat yesterday, but still have the
> > >> furniture to install today.  I just wanted to get this post up ASAP
> > >> with
> > >> some pictures, in case they may help someone.
> > >>
> > >> When I pulled the centerboard I discovered that the blocks on the
> > >> trailing
> > >> edge had pulled out at some previous time and been re-installed
> roughly
> > >> an
> > >> inch lower.  The blocks used were not of the best quality, and I
> didn't
> > >> like
> > >> the installation method very much either (number 8 SS bolt with
> locking
> > >> nut,
> > >> about 1/4" from edge) as it looked like it would eventually pull out
> as
> > >> well.  So I fabricated a set of strain plates and installed them on
> > >> either
> > >> side of the centerboard using eight 1/2" #6 stainless sheet-metal
> > >> screws
> > >> each side.  The plates were fabricated from 316 Stainless, and are
> > 0.030"
> > >> thick.  The plates were drilled with 1/4" holes to accept 1/4" x 1/2"
> > >> clevis
> > >> pins for the upgraded blocks shown in the picture:
> > >> http://PoiesisResearch.com/Plates.png<http://poiesisresearch.com/Plates.png>.
>  The older damaged areas were
> > then
> > >> filled in with epoxy putty and sanded smooth.
> > >>
> > >> I also wanted to reduce the vertical axis rotational slop at the
> > >> centerboard
> > >> pin, so I fabricated the pin shown in the picture (in Anne's hand,
> also
> > >> 316
> > >> stainless steel) with bearing sleeves made from UHMW-PE as shown.
> > >> These
> > >> bearings are set on shoulders machined into the pin and are 1/2" long
> > >> axially.  The shoulders were polished to make a hard bearing surface,
> > and
> > >> the external diameter of the bearings forms a snug but not tight fit
> at
> > >> the
> > >> bottom of the centerboard trunk slot.  The centerboard is free to
> slide
> > >> laterally on the pin.
> > >>
> > >> After measuring my slots, etc., I thought a slightly larger than 5/8"
> > >> I.D.
> > >> hose could be used without binding anything and went shopping at my
> > local
> > >> rubber goods supplier's shop.  I found a Goodyear product (HORIZON tm
> > >> 3/4"
> > >> (19.1 mm) 200 PSI W.P) with an external diameter of about 1.125" that
> > >> looked
> > >> good and bought a couple of feet of it to try.  My slots are tapered
> > both
> > >> fore and aft and laterally, so this hose is tighter near the pivot pin
> > >> than
> > >> higher up, which is a nice design feature as it will keep the board
> > >> centered
> > >> in the trunk while the resistance to lateral movement will increase as
> > >> the
> > >> lateral movement traveling arc increases the contact area in the
> > >> tapered
> > >> area.
> > >>
> > >> Two pieces of hose were cut just long enough so the bottoms touched
> the
> > >> UHMW-PE bearings, and the tops become constrained when the centerboard
> > >> trunk
> > >> cap is put back in place.  Picture here:
> > >> http://PoiesisResearch.com/Hoses.png<http://poiesisresearch.com/Hoses.png>.
>  The hoses were simply jammed
> > into
> > >> the
> > >> slots from above.
> > >>
> > >> We won't get a chance to try this system out this weekend, and since
> > >> the
> > >> boat is on a trailer I can't check the play of the centerboard until
> we
> > >> get
> > >> it back in the water . . . hopefully next weekend.  If I didn't
> > >> inadvertently tangle up the pendant inside the trunk or leave areas
> > >> unsealed
> > >> on the trunk cap I expect the "new" system to work well!  I'll post
> > >> results
> > >> after we get some testing done, hopefully next weekend.
> > >>
> > >> Bill
> > >>
> > >>
> > >>
> > >>
> > >> --
> > >> View this message in context:
> > >> http://old.nabble.com/Loose-centerboard-tp30013496p30041780.html
> > >> Sent from the Rhodes 22 mailing list archive at Nabble.com.
> > >>
> > >>
> > >> __________________________________________________
> > >> To subscribe/unsubscribe go to
> > >> http://www.rhodes22.org/mailman/listinfo/rhodes22-list
> > >>
> > >> For the list Charter and help with using the mailing list and archives
> > go
> > >> to
> > >> http://www.rhodes22.org/list
> > >> __________________________________________________
> > >>
> > >> __________________________________________________
> > >> To subscribe/unsubscribe go to
> > >> http://www.rhodes22.org/mailman/listinfo/rhodes22-list
> > >>
> > >> For the list Charter and help with using the mailing list and archives
> > go
> > >> to http://www.rhodes22.org/list
> > >> __________________________________________________
> > >>
> > >>
> > >
> > > --
> > > View this message in context:
> > > http://old.nabble.com/Loose-centerboard-tp30013496p30042541.html
> > > Sent from the Rhodes 22 mailing list archive at Nabble.com.
> > >
> > > __________________________________________________
> > > To subscribe/unsubscribe go to
> > > http://www.rhodes22.org/mailman/listinfo/rhodes22-list
> > >
> > > For the list Charter and help with using the mailing list and archives
> > > go
> > > to http://www.rhodes22.org/list
> > > __________________________________________________
> >
> > __________________________________________________
> > To subscribe/unsubscribe go to
> > http://www.rhodes22.org/mailman/listinfo/rhodes22-list
> >
> > For the list Charter and help with using the mailing list and archives go
> > to http://www.rhodes22.org/list
> > __________________________________________________
> >
>
>
>
> --
> Here's what's up for me these days;
>
> http://www.radiationdays.
> <http://www.radiationdays.blogspot.com>com<
> http://www.radiationdays.blogspot.com>
>
> Lynn Hoffman is the author of The Short Course in Beer and The New Short
> Course in Wine. You can read a sample or order your e-copy at:
> https://www.smashwords.com/books/view/16714
>
> •Had enough of gun violence? Read the story of a woman who does something
> about it .
> *Paula Sherman and the National Rifle Association  *
>
> get your e-copy for $4.99 at
> http://www.smashwords.com/books/view/23266
> __________________________________________________
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>
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> to
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> __________________________________________________
>
> __________________________________________________
> To subscribe/unsubscribe go to
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>
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> to http://www.rhodes22.org/list
> __________________________________________________
>


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