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From the 1978 Nationals in Cleveland: The Centerboard Report
A comprehensive technical analysis of centerboard specifications and performance variations observed at the 1978 National Championship, documenting measurements of 92 boats and the discrepancies between official plans and actual construction.
View original on Google Drive · page 4
The scanned issue opens in Google Drive; turn to page 4.
This is a summary. The full article text is © the Thistle Class Association — read the original scan via the link above.