[frers-list]Re: frers-list digest, Vol 1 #508 - 1 msg - Rudder Delamination
Keith Bradley
frers-list@lists.frers33.com
Sun, 20 Nov 2011 22:31:26 -0500
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Thanks Ed
I had a feeling I'd have to make my own templates. Luckily only half the
rudder was affected.
Thanks for the help.
Keith
On 11/20/2011 12:42 AM, edputnam@comcast.net wrote:
>
> Hi Keith,
>
> The most common foam I've use for building rudders is Divinycell H-80
> which has a weight of 5lbs. We also use higher density foam such as
> a800 or a1200 which have a weight of 8 & 12lbs respectively for high
> performance rudders and or rudders which are highly loaded. My guess
> is the lighter of the two would suffice for the Frers 33, as long as
> you can achieve a clean and well prepped bonding surfaces to the
> existing rudder skin, remaining foam and post.
>
> If you have any cavities under the skin, where you have dug out the
> foam I would suggest drilling a small hole at the closed end of the
> cavity, so that when you pour the expanding foam into the void the
> resulting gas and air will have a place to escape.
>
> If you can't find a template for the rudder, hopefully you still have
> one side of the rudder intact, and then you can scribe a
> template from the area opposite of the delamination. Another way
> would be to use a ships curve or batten to reshape/fair your rudder.
>
> Hope this was helpful.
>
> Regards,
>
> Ed Putnam
>
> ------------------------------------------------------------------------
>
> *From: *frers-list-request@lists.frers33.com
> *To: *frers-list@lists.frers33.com
> *Sent: *Saturday, November 19, 2011 1:02:01 AM
> *Subject: *frers-list digest, Vol 1 #508 - 1 msg
>
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>
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> Today's Topics:
>
> 1. Rudder delamination (Keith Bradley)
>
> --__--__--
>
> Message: 1
> Date: Fri, 18 Nov 2011 09:30:45 -0500
> From: Keith Bradley <kbradley@fairpoint.net>
> To: frers-list@lists.frers33.com
> Subject: [frers-list]Rudder delamination
> Reply-To: frers-list@lists.frers33.com
>
> I found some rudder delamination and opened it up to see what was going
> on and found a big void where the foam has rotted away. I am planning
> on filling the void with urethane foam, shaping it then re-glassing it.
> does anyone have a suggestion on what weight foam to use (8lb or 16lb)?
> Also does any know where to get templates for shaping the rudder?
>
> Thanks
> Keith Bradley
>
>
> --__--__--
>
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>
> End of frers-list Digest
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Thanks Ed<br>
<br>
I had a feeling I'd have to make my own templates. Luckily only half
the rudder was affected. <br>
<br>
Thanks for the help.<br>
Keith<br>
<br>
On 11/20/2011 12:42 AM, <a class="moz-txt-link-abbreviated" href="mailto:edputnam@comcast.net">edputnam@comcast.net</a> wrote:
<blockquote
cite="mid:516567993.27129.1321767750239.JavaMail.root@sz0089a.westchester.pa.mail.comcast.net"
type="cite">
<style type="text/css">p { margin: 0; }</style>
<div style="font-family: Arial; font-size: 12pt; color: rgb(0, 0,
0);">
<p>Hi Keith,</p>
<p> </p>
<p>The most common foam I've use for building rudders is
Divinycell H-80 which has a weight of 5lbs. We also use
higher density foam such as a800 or a1200 which have a weight
of 8 & 12lbs respectively for high performance rudders and
or rudders which are highly loaded. My guess is the lighter
of the two would suffice for the Frers 33, as long as you can
achieve a clean and well prepped bonding surfaces to the
existing rudder skin, remaining foam and post. </p>
<p> </p>
<p>If you have any cavities under the skin, where you have dug
out the foam I would suggest drilling a small hole at the
closed end of the cavity, so that when you pour the expanding
foam into the void the resulting gas and air will have a place
to escape. </p>
<p> </p>
<p>If you can't find a template for the rudder, hopefully you
still have one side of the rudder intact, and then you can
scribe a template from the area opposite of the delamination.
Another way would be to use a ships curve or batten to
reshape/fair your rudder.</p>
<p> </p>
<p>Hope this was helpful.</p>
<p> </p>
<p>Regards,</p>
<p>Ed Putnam<br>
<br>
</p>
<p>
</p>
<hr id="zwchr">
<p><b>From: </b><a class="moz-txt-link-abbreviated" href="mailto:frers-list-request@lists.frers33.com">frers-list-request@lists.frers33.com</a><br>
<b>To: </b><a class="moz-txt-link-abbreviated" href="mailto:frers-list@lists.frers33.com">frers-list@lists.frers33.com</a><br>
<b>Sent: </b>Saturday, November 19, 2011 1:02:01 AM<br>
<b>Subject: </b>frers-list digest, Vol 1 #508 - 1 msg<br>
<br>
Send frers-list mailing list submissions to<br>
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You can reach the person managing the list at<br>
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When replying, please edit your Subject line so it is more
specific<br>
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<br>
<br>
Today's Topics:<br>
<br>
1. Rudder delamination (Keith Bradley)<br>
<br>
--__--__--<br>
<br>
Message: 1<br>
Date: Fri, 18 Nov 2011 09:30:45 -0500<br>
From: Keith Bradley <a class="moz-txt-link-rfc2396E" href="mailto:kbradley@fairpoint.net"><kbradley@fairpoint.net></a><br>
To: <a class="moz-txt-link-abbreviated" href="mailto:frers-list@lists.frers33.com">frers-list@lists.frers33.com</a><br>
Subject: [frers-list]Rudder delamination<br>
Reply-To: <a class="moz-txt-link-abbreviated" href="mailto:frers-list@lists.frers33.com">frers-list@lists.frers33.com</a><br>
<br>
I found some rudder delamination and opened it up to see what
was going <br>
on and found a big void where the foam has rotted away. I am
planning <br>
on filling the void with urethane foam, shaping it then
re-glassing it. <br>
does anyone have a suggestion on what weight foam to use (8lb
or 16lb)? <br>
Also does any know where to get templates for shaping the
rudder?<br>
<br>
Thanks<br>
Keith Bradley<br>
<br>
<br>
--__--__--<br>
<br>
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