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Gary Hendrickson (Garyh)

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Posted on Friday, March 01, 2002 - 09:39 pm:   

CLASS RESEARCH: Keel Design & Manufacturing History
Submitted by Gary Hendrickson (#094), Class Rules Committee


Original keel vendor used keel mold with two halves
Good control of keel dimensions. Keel weight certificates often overstated
Used on hulls: up to approx. #070 ± 10

2nd vendor, Keelco, used sand-molding process
Fair control of keel dimensions. Weight load caused this mold to tend to expand in width.
Used on hulls: #070 ± 10 and above

Initial keel design exceeded desired design weight
Large holes were bored through near the top of early keels to reduce weight.
Holes were covered over with covering and fairing compound
This hole fairing area tends to bubble up and leak water; readily fixable
Hull numbers up to approx. #012

Keel redesigned to add two 8” deep pocket cutouts in top of keel, in place of holes.
Keel stud sizes and spacing pattern also changed. Date of change: 6/30/83
starting with hull numbers above approx. #012

G & S keel control drawing is Drawing No. 035-09A Alt. A dated 6/30/83, Keel Sections & Bolt Pattern

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