Gary Hendrickson (Garyh)
Rating: N/A Votes: 0 | 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 |