[Public-List] Rudder Shoe Casting Shrinkage Issues

[Peter McEvoy]

Thanks Gordon and George for chiming in about the rudder shoe casting and
whether or not shrinkage will be an issue for us.

To keep it short, I really don't think it will be an issue. Shrinkage of 2%
would indeed matter for an auto part, as Gordon cautioned. But for this
situation, it really just needs to fit snugly on the butt of the keel. From
my reading, I understand that the shoe is placed on the keel with an
intermediary layer of epoxy or adhesive, and then drilled into the keel-
this sounds to me like there is some wiggle-room. Even with maximum
shrinkage, we'd only lose 3/32" in length and 3/64" in width. I would call
that negligible.

Then again, I don't know how picky people are. Anybody whose replaced a
shoe- do you think these numbers will make a difference?

We could make the mold bigger if this is necessary, it's just more work
(and mold-material cost).  I wish it were as simple as Kris suggested-  to
heat the piece to increase it's size before taking the mold- but alas, the
mold material (urethane rubber) is heat sensitive and also cures over a
span of 24 hours or so, which would not make the method practical. We could
do it if we need to, but let's see what hands-on-experienced folks think
first.

UPDATED LIST:

Rudder Shoe:
Bill Ydel - wcydel at gmail.com
Mike Lehman - sail_505 at hotmail.comJeff Fongemie - fongemie at gmail.com
Brian Curry - brian_curry at hotmail.com
David Mitchell - david at mitchellent.com
Peter McEvoy - peter.t.mcevoy at gmail.com
Jim Allocco - jamesallocco at gmail.com
James Almond - okeebc at gmail.com
Clayton Zimmerman - cb_zimmerman at hotmail.com
Jon Budington - jon at globalprinting.com
Jason ssteen - mpcylinderheads at gmail.com
Don Lang - potatosailor at yahoo.com
Gordon White - gewhite at crosslink.net
Chuck Thomas - thomascwcj at bellsouth.net
Mark Dietrich - mrkdtrch at yahoo.com
Glenn Brooks - brooks.glenn at comcast.net
Joseph Balderson - joebinc at gmail.com
Jeff Fongemie - fongemie at gmail.com
James McRury - jdmcrury at yahoo.co.uk
Rick Leach - rixquik at yahoo.com
Dana Shafie - Dana.shafie at verizon.net
LAF "Avalon" #309 - reefed.main at gmail.com
Bob Bounds - bobbounds at comcast.net
(Chris Martin notcmartin at yahoo.com TENTATIVE)

Gudgeon Sets:
Glenn Brooks - brooks.glenn at comcast.net
David Mitchell - david at mitchellent.com
Michael Connolly #133 - crufone at comcast.net
Peter McEvoy - peter.t.mcevoy at gmail.com
James Almond - okeebc at gmail.com
Clayton Zimmerman - cb_zimmerman at hotmail.com
Jason ssteen - mpcylinderheads at gmail.com (Interested in the two part
gudgeon and pintle version)
Don Lang - potatosailor at yahoo.com
Gordon White - gewhite at crosslink.net
Chuck Thomas - thomascwcj at bellsouth.net
Mark Dietrich - mrkdtrch at yahoo.com
Joseph Balderson - joebinc at gmail.com
Jeff Fongemie - fongemie at gmail.com
James McRury - jdmcrury at yahoo.co.uk
Rick Leach - rixquik at yahoo.com
Dana Shafie - Dana.shafie at verizon.net
LAF "Avalon" #309 - reefed.main at gmail.com
Bob Bounds - bobbounds at comcast.net
(Chris Martin notcmartin at yahoo.com TENTATIVE)