SailNet Community - View Single Post - Is this delamination or oilcanning ?
View Single Post
post #4 of Old 09-04-2009
Senior Member
RichH's Avatar
Join Date: Jul 2000
Location: Pennsylvania
Posts: 4,337
Thanks: 41
Thanked 235 Times in 222 Posts
Rep Power: 18
Most probably the boat has been blocked improperly and the stresses from the improperly placed jackstands and *location of blocks under the keel* are causing the warpage of the hull.

Especially if the far aft trailing section of the keel is sitting on a 'block', the keel aft section will tend to 'rotate up' and the flat hull sections adjacent to the keel root will 'buckle'. When blocking such keels the aft block should be placed DIRECTLY under (and slightly in front of) a line running straight down from the intersection of the aft section of the keel and the hull; if the keel is blocked aft of the above location then the keel will apparently 'rotate' and hull buckling will almost certainly develop. Many boats of this era are subject to this 'blocking / jackstand' anomaly, and if properly 'reblocked' will rapidly resume their proper 'shape'. Such boats also benefit if the far front and far aft jackstands be set up a bit 'tighter' than those set amidships.

Pearsons, ODays and other similar boat designs will do this buckling if blocked improperly .... Nothing to worry about if not left too long and the FRG doesnt begin to 'creep' (permanent viscoelastic distortion).

Suggest that the hull be 'reset' properly on the jackstands so you can make a better decision.


Last edited by RichH; 09-04-2009 at 09:39 AM.
RichH is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome