[frers-list]Re: frers-list digest, Vol 1 #508 - 1 msg - Rudder Delamination
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Sun, 20 Nov 2011 05:42:30 +0000 (UTC)
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Hi Keith,=20
=C2=A0=20
The most common foam=C2=A0I've use for building rudders is Divinycell H-80 =
which has a weight of 5lbs.=C2=A0 We=C2=A0also use higher density foam such=
as a800 or a1200 which have a weight of 8 & 12lbs respectively for high pe=
rformance rudders and or rudders which are highly loaded.=C2=A0 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=C2=A0to the existing rudd=
er skin, remaining=C2=A0foam and post.=20
=C2=A0=20
If you have any cavities under the skin, where you have dug out the foam I =
would suggest drilling a small hole=C2=A0at the closed end of the cavity, s=
o that when you pour the expanding foam into the void the resulting gas and=
air will have a place to escape.=C2=A0=C2=A0=20
=C2=A0=20
If you can't=C2=A0find a=C2=A0template for the rudder, hopefully you still =
have one side of the rudder intact, and then you can scribe a template=C2=
=A0from=C2=A0the area opposite of the delamination.=C2=A0 Another way would=
be to use a ships curve or batten to reshape/fair=C2=A0your rudder.=20
=C2=A0=20
Hope this was helpful.=20
=C2=A0=20
Regards,=20
Ed Putnam=20
----- Original Message -----
From: frers-list-request@lists.frers33.com=20
To: frers-list@lists.frers33.com=20
Sent: Saturday, November 19, 2011 1:02:01 AM=20
Subject: frers-list digest, Vol 1 #508 - 1 msg=20
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When replying, please edit your Subject line so it is more specific=20
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Today's Topics:=20
=C2=A0=C2=A0 1. Rudder delamination (Keith Bradley)=20
--__--__--=20
Message: 1=20
Date: Fri, 18 Nov 2011 09:30:45 -0500=20
From: Keith Bradley <kbradley@fairpoint.net>=20
To: frers-list@lists.frers33.com=20
Subject: [frers-list]Rudder delamination=20
Reply-To: frers-list@lists.frers33.com=20
I found some rudder delamination and opened it up to see what was going=20
on and found a big void where the foam has rotted away. =C2=A0I am planning=
=20
on filling the void with urethane foam, shaping it then re-glassing it. =C2=
=A0=20
does anyone have a suggestion on what weight foam to use (8lb or 16lb)? =C2=
=A0=20
Also does any know where to get templates for shaping the rudder?=20
Thanks=20
Keith Bradley=20
--__--__--=20
_______________________________________________=20
frers-list mailing list=20
frers-list@lists.frers33.com=20
http://lists.frers33.com/mailman/listinfo/frers-list=20
End of frers-list Digest=20
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<html><head><style type=3D'text/css'>p { margin: 0; }</style></head><body><=
div style=3D'font-family: Arial; font-size: 12pt; color: #000000'><P>Hi Kei=
th,</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 s=
uch as a800 or a1200 which have a weight of 8 & 12lbs respectively for =
high performance rudders and or rudders which are highly loaded. My g=
uess is the lighter of the two would suffice for the Frers 33, as long as y=
ou can achieve a clean and well prepped bonding surfaces to the existi=
ng 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 sti=
ll have one side of the rudder intact, and then you can scribe a template&n=
bsp;from the area opposite of the delamination. Another way woul=
d 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>
<HR id=3Dzwchr>
<P></P>
<P><B>From: </B>frers-list-request@lists.frers33.com<BR><B>To: </B>frers-li=
st@lists.frers33.com<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> &n=
bsp; frers-list@lists.frers33.com<BR><BR>To subscribe or unsubscribe v=
ia the World Wide Web, visit<BR> &=
nbsp;http://lists.frers33.com/mailman/listinfo/frers-list<BR>or, via email,=
send a message with subject or body 'help' to<BR> &=
nbsp; frers-list-request@lists.frers33.com<BR><BR>You can =
reach the person managing the list at<BR> &nbs=
p; frers-list-admin@lists.frers33.com<BR><BR>When replying, plea=
se edit your Subject line so it is more specific<BR>than "Re: Contents of f=
rers-list digest..."<BR><BR><BR>Today's Topics:<BR><BR> 1. Rudd=
er delamination (Keith Bradley)<BR><BR>--__--__--<BR><BR>Message: 1<BR>Date=
: Fri, 18 Nov 2011 09:30:45 -0500<BR>From: Keith Bradley <kbradley@fairp=
oint.net><BR>To: frers-list@lists.frers33.com<BR>Subject: [frers-list]Ru=
dder delamination<BR>Reply-To: frers-list@lists.frers33.com<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 rudde=
r?<BR><BR>Thanks<BR>Keith Bradley<BR><BR><BR>--__--__--<BR><BR>____________=
___________________________________<BR>frers-list mailing list<BR>frers-lis=
t@lists.frers33.com<BR>http://lists.frers33.com/mailman/listinfo/frers-list=
<BR><BR><BR>End of frers-list Digest<BR></P></div></body></html>
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