Sage 15 construction material.

Discuss the Jerry Montgomery designed pocket cruiser SAGE 15 (sloop) and SageCat (catboat version of the Sage 15)

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Sage 15 construction material.

#1 Post by noel » Wed Jan 29, 2020 4:02 pm

Curious to what Sage Marine uses in construction of transom and bulkheads? Old, questionable memory of seeing images of plywood being used on the bulkheads.

This months Practical Sailor magazine had an article comparing the +/- of Coosa, foam, end grain balsa and plywood. Didn’t realize until reading the article that balsa relative to the other materials has the highest compression and sheer load. Low density relative to Coosa, plywood and most foam.

The discoloration and decomposed nature of foam in some older boats viewed has me questioning the “waterproof” advantage of foam over balsa. Decomposition could have been due more to mold breeding in the moist foam. So why not end grain balsa instead of foam? Cost?