R22 Discussion Group

Graham,
It will serve no purpose to add additional layers of glass, either inside  
or out.

Rummy

In a message dated 12/20/2013 8:43:02 P.M. Eastern Standard Time,  
gstewart8 at cogeco.ca writes:

Rummy:
Thanks for that information and advice. I was thinking  that I might add a
few layers of glass on the inside - not the outside of  the hull. Presumably
it would be much easier to do and I would, presumably,  get a better bond on
the inside where I could rough up the old surface  pretty thoroughly. It may
also be that once I reinstall the main bulkhead,  that alone will strengthen
the hull sufficiently as it sits very close to  where the indentation was. I
don't want to do this work if it serves no  real purpose, or creates other
problems,  so your advice and  experience  is welcome.

Graham 

-----Original  Message-----
From:  rhodes22-list-bounces at rhodes22.org
[mailto:rhodes22-list-bounces at rhodes22.org]  On Behalf Of
R22RumRunner at aol.com
Sent: December-20-13 3:54 PM
To:  rhodes22-list at rhodes22.org
Subject: Re: [Rhodes22-list] Hull  strengthening

Graham,
What you are describing is what is called oil  canning. It's been discussed
many times over the years and the consensus  was to not add additional
fiberglass  and weight to the hull. It's not  a big deal once you get it off
the trailer. It  simply goes away. A  couple of years ago a Rhodes owner had
his hull sand blasted  in  preparation for a new bottom coat and
anti-fouling. In the process  they  discovered that this hull had been
glassed over as you are  thinking of doing. It  delaminated and they tore 
the
whole mess off  the boat. It added hours of  needless repairs and cost to  
the
project.

Rummy

In a message dated 12/20/2013 2:06:01  P.M. Eastern Standard Time,
gstewart8 at cogeco.ca writes:

Lou   plans to strengthen his hull and I was considering the same since I
have  the interior of my 76 completely stripped out. It seems like the
opportune  time to do so if it is worthwhile and if I had some idea of what
was  needed.
It would only be feasible to do the main cabin and possible  the  forward
area if I remove the foam. I am not sure how the foam is  held in  place and
how I would reattach it.

Has anyone done  this or do they  have any technical thoughts about how many
layers of  fibreglass should be  added? Is it really worth the effort?

The  reasons I am thinking about  this is that I understand that later  
boats
have a heavier layup and I  assume there was a good reason for  that and
because the hull seems overly  flexible and has taken a dent  where the
forward starboard strut of the  trailer presses on the hull.  I jacked the
boat up about 2 years ago and  most of the dent has come  out, but I thought
that some strengthening -  perhaps with  strengthening ribs of some sort
might be prevent the  impression from  forming again when the boat is 
lowered
back on the  bunk.

I  would value thought from those who might know more about  whether  and/or
how to proceed.

-----Original   Message-----
From:   rhodes22-list-bounces at rhodes22.org
[mailto:rhodes22-list-bounces at rhodes22.org]   On Behalf Of Lou Rosenberg
Sent: December-20-13 1:24 PM
To:   rhodes22-list at rhodes22.org
Subject: Re: [Rhodes22-list] Centerboard   replacement.

James,

I renovated my '81 centerboard trunk  and  mechanism.  While its a totally
different design than what  you have in  front of you, I recommend trying to
re create what Stan  had in that era of  R22s.   Try to create a two piece 
(cap  and flange ) system with  a recessed "V" inside your trunk to hold  
the
pivot pin.
If for some  reason you have no access to pics of  this, I can supply some
directly to  you.

I have documented my  renovation in the Owner's site in the section  under
technical details  I believe.
Roger Pihlaja did most of the writing  on the structural  details of the
cement and glass work. I followed his  online  instructions and did the job
alone. I took one year of hard labor  but  it was worth it.  Since then I ve
re lined my centerboard cap  and  flange with Garolite (1/4") to make a firm
seal.  I have not  had any  issues since but am very curious to know how far
you took  your restoration  of the hull.

I plan to add stringers under my  cockpit and remove the  fwd foam to also
strengthen the glass from  inside my boat.  I had a  major issue with boat
pox which  resulted in small hull leaks.

Good  luck with your  endeavor.

Lou Rosenberg
s/v Miracles
Mill Basin  Bklyn  NY

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Hull strengthening