On Sep 23, 2016, at 12:44 PM, lokiyawl2 lokiyawl2@... [amelyachtowners] <amelyachtowners@...> wrote:

On Fri, 9/23/16, Bill Kinney greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: Re: [Amel Yacht Owners] SM Jib Furler Failure.
To: "James Wendell ms42phantom54@..." <amelyachtowners@...>
Date: Friday, September 23, 2016, 9:10 AM


 









There are many things connected to the bonding
system that aren’t themselves being protected from
corrosion by such a connection.  The bonding connections
are not ONLY about corrosion protection by connection to the
rudder zinc.
In a boat where the DC neutral
and the bonding system are deliberately connected, it could
serve as a return path to the battery in case of a leak from
the positive side of the DC system to the case of the motor.
 I confess to not really having a good understanding of the
logic in connecting things like the bilge pump or the
freshwater pump to the bonding circuit in an Amel.  It
certainly is not to protect them from corrosion by
connecting them to the rudder zinc.
By the way, does anybody know
offhand the size of the rivets in the furler?

Bill KinneySM #160, HarmonieReedville, VA, Chesapeake Bay,
USA“Ships and men
rot in port."http://fetchinketch.net






On Sep 22, 2016, at 22:20, Kent
Robertson karkauai@...
[amelyachtowners] <amelyachtowners@...>
wrote:

That makes sense, Bill.  Guess I
was thinking of sea water on furler, deck, hull all
interconnecting as if submerged.
So the furling motor is not
bonded to the zincs?  What about the bow thruster?  If
have sworn they were both connected via the yellow/green
wires.
I'll be back aboard next week
and look again.
KentSM 243Kristy
On Sep 22, 2016, at 7:56 PM, Bill
Kinney greatketch@... [amelyachtowners]
<amelyachtowners@...>
wrote:

 
Kent,
Bonding would have no effect on
corrosion here. The zinc that is attached to the bonding
system has to be in the same “body of water” as the
metals it is protecting.  In this case the “body of
water” is the tiny little puddle between the stainless
steel screws and the aluminum plate. It is its own little
battery, and connections to the rest of the boat are
immaterial. These stainless screws seem to have been the
focal point for the corrosion on my piece.  
Other than disassembling the
furler unit, this is an easy fix.  The plate is just a
round piece of 1/4 inch aluminum with four holes in it.  If
I was in a remote place, I could make it on the boat with
hand tools.
While I have things apart, I am
taking Kent's suggestion and finding a local powder coat
shop to have everything made pretty… hopefully for much
longer than paint.
Bill KinneySM #160, HarmonieReedvile, VA, Chesapeake Bay,
USA“Ships and men
rot in port."http://fetchinketch.net




On Sep 22, 2016,
at 17:37, Kent Robertson karkauai@... [amelyachtowners]
<amelyachtowners@...>
wrote:
 
I don't know if the furler on
Kristy is connected.  Sure seems like it should
be...exposed to sea water, dissimilar metals.  Wonder why
it wouldn't be?  Anybody else know if their furler is
connected?
Kent

Kent Robertsonkarkauai@...
voice/text
On Sep 22, 2016, at
5:02 PM, divanz620@... [amelyachtowners]
<amelyachtowners@...>
wrote:

 Hello Kent,
None of the rigging on my SM is
attached to the bonding system.....
CheersAlanElyse SM437















#yiv0704162125 #yiv0704162125 --
#yiv0704162125ygrp-mkp {
border:1px solid #d8d8d8;font-family:Arial;margin:10px
0;padding:0 10px;}

#yiv0704162125 #yiv0704162125ygrp-mkp hr {
border:1px solid #d8d8d8;}

#yiv0704162125 #yiv0704162125ygrp-mkp #yiv0704162125hd {
color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px
0;}

#yiv0704162125 #yiv0704162125ygrp-mkp #yiv0704162125ads {
margin-bottom:10px;}

#yiv0704162125 #yiv0704162125ygrp-mkp .yiv0704162125ad {
padding:0 0;}

#yiv0704162125 #yiv0704162125ygrp-mkp .yiv0704162125ad p {
margin:0;}

#yiv0704162125 #yiv0704162125ygrp-mkp .yiv0704162125ad a {
color:#0000ff;text-decoration:none;}
#yiv0704162125 #yiv0704162125ygrp-sponsor
#yiv0704162125ygrp-lc {
font-family:Arial;}

#yiv0704162125 #yiv0704162125ygrp-sponsor
#yiv0704162125ygrp-lc #yiv0704162125hd {
margin:10px
0px;font-weight:700;font-size:78%;line-height:122%;}

#yiv0704162125 #yiv0704162125ygrp-sponsor
#yiv0704162125ygrp-lc .yiv0704162125ad {
margin-bottom:10px;padding:0 0;}

#yiv0704162125 #yiv0704162125actions {
font-family:Verdana;font-size:11px;padding:10px 0;}

#yiv0704162125 #yiv0704162125activity {
background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;}

#yiv0704162125 #yiv0704162125activity span {
font-weight:700;}

#yiv0704162125 #yiv0704162125activity span:first-child {
text-transform:uppercase;}

#yiv0704162125 #yiv0704162125activity span a {
color:#5085b6;text-decoration:none;}

#yiv0704162125 #yiv0704162125activity span span {
color:#ff7900;}

#yiv0704162125 #yiv0704162125activity span
.yiv0704162125underline {
text-decoration:underline;}

#yiv0704162125 .yiv0704162125attach {
clear:both;display:table;font-family:Arial;font-size:12px;padding:10px
0;width:400px;}

#yiv0704162125 .yiv0704162125attach div a {
text-decoration:none;}

#yiv0704162125 .yiv0704162125attach img {
border:none;padding-right:5px;}

#yiv0704162125 .yiv0704162125attach label {
display:block;margin-bottom:5px;}

#yiv0704162125 .yiv0704162125attach label a {
text-decoration:none;}

#yiv0704162125 blockquote {
margin:0 0 0 4px;}

#yiv0704162125 .yiv0704162125bold {
font-family:Arial;font-size:13px;font-weight:700;}

#yiv0704162125 .yiv0704162125bold a {
text-decoration:none;}

#yiv0704162125 dd.yiv0704162125last p a {
font-family:Verdana;font-weight:700;}

#yiv0704162125 dd.yiv0704162125last p span {
margin-right:10px;font-family:Verdana;font-weight:700;}

#yiv0704162125 dd.yiv0704162125last p
span.yiv0704162125yshortcuts {
margin-right:0;}

#yiv0704162125 div.yiv0704162125attach-table div div a {
text-decoration:none;}

#yiv0704162125 div.yiv0704162125attach-table {
width:400px;}

#yiv0704162125 div.yiv0704162125file-title a, #yiv0704162125
div.yiv0704162125file-title a:active, #yiv0704162125
div.yiv0704162125file-title a:hover, #yiv0704162125
div.yiv0704162125file-title a:visited {
text-decoration:none;}

#yiv0704162125 div.yiv0704162125photo-title a,
#yiv0704162125 div.yiv0704162125photo-title a:active,
#yiv0704162125 div.yiv0704162125photo-title a:hover,
#yiv0704162125 div.yiv0704162125photo-title a:visited {
text-decoration:none;}

#yiv0704162125 div#yiv0704162125ygrp-mlmsg
#yiv0704162125ygrp-msg p a span.yiv0704162125yshortcuts {
font-family:Verdana;font-size:10px;font-weight:normal;}

#yiv0704162125 .yiv0704162125green {
color:#628c2a;}

#yiv0704162125 .yiv0704162125MsoNormal {
margin:0 0 0 0;}

#yiv0704162125 o {
font-size:0;}

#yiv0704162125 #yiv0704162125photos div {
float:left;width:72px;}

#yiv0704162125 #yiv0704162125photos div div {
border:1px solid
#666666;min-height:62px;overflow:hidden;width:62px;}

#yiv0704162125 #yiv0704162125photos div label {
color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;}

#yiv0704162125 #yiv0704162125reco-category {
font-size:77%;}

#yiv0704162125 #yiv0704162125reco-desc {
font-size:77%;}

#yiv0704162125 .yiv0704162125replbq {
margin:4px;}

#yiv0704162125 #yiv0704162125ygrp-actbar div a:first-child {
margin-right:2px;padding-right:5px;}

#yiv0704162125 #yiv0704162125ygrp-mlmsg {
font-size:13px;font-family:Arial, helvetica, clean,
sans-serif;}

#yiv0704162125 #yiv0704162125ygrp-mlmsg table {
font-size:inherit;font:100%;}

#yiv0704162125 #yiv0704162125ygrp-mlmsg select,
#yiv0704162125 input, #yiv0704162125 textarea {
font:99% Arial, Helvetica, clean, sans-serif;}

#yiv0704162125 #yiv0704162125ygrp-mlmsg pre, #yiv0704162125
code {
font:115% monospace;}

#yiv0704162125 #yiv0704162125ygrp-mlmsg * {
line-height:1.22em;}

#yiv0704162125 #yiv0704162125ygrp-mlmsg #yiv0704162125logo {
padding-bottom:10px;}


#yiv0704162125 #yiv0704162125ygrp-msg p a {
font-family:Verdana;}

#yiv0704162125 #yiv0704162125ygrp-msg
p#yiv0704162125attach-count span {
color:#1E66AE;font-weight:700;}

#yiv0704162125 #yiv0704162125ygrp-reco
#yiv0704162125reco-head {
color:#ff7900;font-weight:700;}

#yiv0704162125 #yiv0704162125ygrp-reco {
margin-bottom:20px;padding:0px;}

#yiv0704162125 #yiv0704162125ygrp-sponsor #yiv0704162125ov
li a {
font-size:130%;text-decoration:none;}

#yiv0704162125 #yiv0704162125ygrp-sponsor #yiv0704162125ov
li {
font-size:77%;list-style-type:square;padding:6px 0;}

#yiv0704162125 #yiv0704162125ygrp-sponsor #yiv0704162125ov
ul {
margin:0;padding:0 0 0 8px;}

#yiv0704162125 #yiv0704162125ygrp-text {
font-family:Georgia;}

#yiv0704162125 #yiv0704162125ygrp-text p {
margin:0 0 1em 0;}

#yiv0704162125 #yiv0704162125ygrp-text tt {
font-size:120%;}

#yiv0704162125 #yiv0704162125ygrp-vital ul li:last-child {
border-right:none !important;
}
#yiv0704162125

 

On Sep 23, 2016, at 10:10 AM, Bill Kinney greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:

On Sep 22, 2016, at 7:56 PM, Bill Kinney greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:

On Sep 22, 2016, at 5:02 PM, divanz620@... [amelyachtowners] <amelyachtowners@...> wrote:

On Sep 22, 2016, at 5:56 PM, Kent Robertson karkauai@... [amelyachtowners] <amelyachtowners@...> wrote:

Just shooting from the hip here Bill, I've not heard of a failure like that before.  Glad you were able to get it furled manually...did you have the manual furler set up already?

Certainly corrosion the most likely culprit, but why such catastrophic failure?  1.  Could there have been some stray current involved?  2.  I'm sure it should be attached to the bonding system, if that failed, it might not have been protected.  The aluminum would go b4 the SS.  I couldn't keep paint on my furler despite two "professional" paint jobs.  I finally took it apart and had it powder coated 3 years ago and so far looks great.

Could the bolts have been tightened too much creating cracks that allowed water ingress?

Will be interested to hear what you find.

Kent

SM 243

Kristy

On Sep 22, 2016, at 10:58 AM, greatketch@... [amelyachtowners] <amelyachtowners@...> wrote:

 

In the SM jib furler, there is an aluminum plate that transfers the torque from the motor to the foil via the release pin.  It has one large hole in it that accepts the release pin, and smaller holes which take machine screws down into the rotating part of the motor.

Yesterday while sailing in 20 to 25 knots of wind, close-hauled, with the jib rolled up to its second reef mark, that plate self destructed, cracking into several pieces releasing the jib foil from the furler motor.  I am happy to report the manual furling system does work, after a fashion.  

I haven’t had the chance to disassemble things yet to see if other damage occurred as well which might have either caused, or been caused by, the plate failure.

Anybody see this failure before? Other than it’s old and showed signs of corrosion, which is certainly sufficient to be the primary cause, anybody have another potential cause I should look out for?

Bill Kinney

SM#160, Harmonie

Chesapeake Bay, VA, USA

On Sep 22, 2016, at 10:58 AM, greatketch@... [amelyachtowners] <amelyachtowners@...> wrote: