Join Date: Nov 2007
Location: SF Bay area
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It echoes a lot of the opinions I've read here, but with some formal reasoning to back it up.
One thing I noticed he did, though, when analyzing the dynamic load on all-chain rode vs. all-nylon rode. For the all-chain rode he assumed that the force on the rode was sufficient to lift the entire rode off the bottom, and gave the force. He made the same assumption for the nylon rode but didn't mention the exact force. This would occur for a much higher force for chain than for nylon, so the comparison isn't totally fair. If the force that lifts the all-nylon rode were applied to the all-chain rode, then presumably the catenary could absorb the extra tension due to a sudden gust, and the lack of elasticity of the chain would not be an issue.
Other than that, very rigorous treatment. I'll have to let it set in my brain and then uh, back down on the engine, metaphorically speaking.
s/v Laelia - 1978 Pearson 365 ketch
s/v Essorant - 1972 Catalina 27