Similar story to Giles - M15 - lost the CB of of Nantuckt Is on 4 day cruise. Ideal winds ( steady 12 kts) but on the nose. 1 kt current on the nose. full main and working jib. GPS speed over ground 4kts. forward progress upwind after tacking back and forth for an hour = 0. I went to Hyannis instead as it was a beam reach :) You might do a little better in the M17 but I would not intentionally cruise without a CB unless i had a lot of gas. Doug Kelch M15 "Seas the Day" --- "Morris, Giles" <giles.morris@unisys.com> wrote:
less than a 10% increase in windward performance compared to the board being up or down
Random thoughts without any hard data to back them up:
I sailed Umiaq for a while with the centerboard either jammed up or missing. Although I wouldn't care to put a number on it, It made a big difference when beating to windward.
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