Dependent on how the bolts are fixed into the keel you may not actually be
able to inspect them other than have a look at the top fixings (not what i
would call an inspection). IF they are 'just' screwed into the cast iron
then you can pull one or two but that is not a job for the faint-hearted OR
the inexperienced. Unless you have a 'real' reason for doing this i would
put it a the very very bottom of your to do list.
regards
David
On 29 August 2011 09:05, Conn Williamson <connwilliamson@...> wrote:
**
All this makes great reading, very interesting, thanks guys.
I had bolt inspection on my too doo list.
Cheers....Conn Williamson- Mango #28
From: David Mackintosh <sv.highland.fling@...>
To: amelyachtowners@...
Sent: Monday, 29 August 2011 8:46 AM
Subject: Re: [Amel] Re: Corrosion, hull-ballast
really!!! what a helpful reply - tis not me that is talking rubbish -
maybe it is you have missed taking your medication :-(
regards
David
On 28 August 2011 23:40, Joel F Potter <jfpottercys@...> wrote:
**
Mack, you need to get back on your meds...
All the best,
Joel F. Potter
Joel F. Potter - Cruising Yacht Specialist, LLC
Amel's Sole Associate for the Americas
Mailing Address: 401 East Las Olas Boulevard #130-126
Fort Lauderdale, Florida 33301
Phone: (954) 462-5869 Cell: (954) 812-2485
Email: jfpottercys@...
www.yachtworld.com/jfpottercys
-----Original Message-----
From: amelyachtowners@...
[mailto:amelyachtowners@...] On Behalf Of David Mackintosh
Sent: Sunday, August 28, 2011 6:15 PM
To: amelyachtowners@...
Subject: Re: [Amel] Re: Corrosion, hull-ballast
OH MY You are by reputation somewhat of an Amel expert BUT Beneteau keels
are CAST IRON then you add and similar boats!!!! What a sweeping
statement
and can i suggest a total load of rubbish - perhaps you would like to
list
the boat that you 'know for a fact' have steel keels.
Yes some boats do have steel keels - generally high performance boats
which
have a steel (either hollow and welded together with ribs like an
aeroplane
wing or machined exceptionally carefully from a solid billet of steel)
fin
and with a BIG lead bulb at the bottom. In the UK 'some' small bilge keel
boats do have simple sheet steel twin keels i know of no production
cruising
boats that have steel keels so i am looking forward to getting this list.
ALSO the worst thing you can do with stainless steel is use stainless
steel
for some purpose then stop it getting a supply of air 'oxygen' - that
cause
crevice corrosion.
Then screw stainless steel into cast iron and you will get galvanic
corrosion.
So two surveyors inspected the keel bolts did they? - they pulled them? -
how many did the pull? - for a proper investigation? - then used a
certified metallurgist to produce a report on the keel bolts?
Do tell me what grade of Stainless steel alloy these keel bolts are. One
of
the 300 series perchance 304 316 or?
Lead keels are infinitely better than a cast iron keel for many many
reasons
- . Lead is superior in every way. Lead gets the Vertical Centre of
Gravity
lower, AND Lead absorbs collisions better, and is more resistant to
corrosion. The main reason for using cast iron rather than lead - is
cost. Also steel is actually heavier than cast iron lbs per cubic inch
Steel .2836 Cast Iron .2590 Lead being significantly heavier at .4100
In a grounding the big issue is not the strength of the keel but how the
hull and floors and other forms of stiffening and load bearing structures
can take the (over)loading and transfer and absorb the energy that they
are
subject too when 30 metric tons of boat comes to a complete stop in less
than half a second and the point of contact is the bottom leading edge of
the keel. Lead being softer than cast iron 'some' of that energy is
absorbed by the lead as it deflects and deforms so less energy is
transferred into the actual hull form than if the boat had a cast iron
keel.
Now i am not saying the keel fixings on an Amel are inadequate i have
heard
of only one Amel that lost its keel however i have real issues when i
read
that sort of thing from someone how 'should know better'
regards
David
On 28 August 2011 21:53, Joel F Potter <jfpottercys@...> wrote:
**
The keel bolts are indeed Stainless steel/inox. They are located at the
bottom of the stub keel inside the large water tank. You can access
them
easily in the Maramu by opening the tank-top inspection ports. Don't be
afraid of a little corrosion as the Stainless steel nuts are mounted on
steel flat plate and this area corrodes somewhat but not enough to
worry
about it. Take comfort in the fact that Amel employs twice as many keel
bolts that are all 30% larger than what the regulations call for,
either
the
previous French Merchant Marine standards or the more recent CE
specifications. Also, in thirty years of selling new and used Amel
boats,
not one of the more than 400+ used boats I have sold have ever had an
issue
with the keel bolts when inspected by the two surveyors I generally
employ
of behalf of the buyer and sometimes the seller.
The keel is iron, not steel like on Beneteau and similar boats. Captain
Amel
specified iron and not lead because iron is much stronger and more
resistant
to damage from groundings and also because an Amel keel is made to be
wide
enough to let the boat stand on the keel unaided when drying out or on
the
hard. DON'T ever let your Amel stand unsupported just because it can.
Always
use appropriate structure and bracing when the boat goes on dry land.
ALWAYS.
If you search under replacing keel coatings in the previous posts, you
will
find something I wrote about how to best replace the keel coatings, it
was
on 3 July 2007. If you follow these instructions, you will be happy
with
the
results.
Good luck in the hunt for an Amel that suits you and be sure to have it
surveyed by someone who is extremely familiar with these particular
boats.
In Europe I can highly recommend Olivier Beaute who used to run the
Amel
service department before branching off on his own.
www.atlanticyachtsurvey.com is his website with contact information.
All the best,
Joel F. Potter
Joel F. Potter - Cruising Yacht Specialist, LLC
Amel's Sole Associate for the Americas
Mailing Address: 401 East Las Olas Boulevard #130-126
Fort Lauderdale, Florida 33301
Phone: (954) 462-5869 Cell: (954) 812-2485
Email: <mailto:jfpottercys@...> jfpottercys@...
<http://www.yachtworld.com/jfpottercys> www.yachtworld.com/jfpottercys
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