[quote=samc99us][quote=waiex191]I sewed my first sail with V69, but that is pretty much the limit of the machine. I'm assuming I'd use 4oz dacron for the sails - please correct me if I'm wrong.
For the really thick patches, if my Brother machine couldn't handle it, I'd use the vintage Singer. Unfortunately that machine only does straight stitches, so I'd just sew some more rows.[/quote]
Most beachcat sails are built with Contender Apen 06 OD, a 4.5 oz laminate. As others have said, there are many more layers in high load areas, and normal sewing machines struggle with this. You really don't want to stitch laminate cloth with multiple rows, that weakens the materials on the seams, which is the worst possible place to do so.
With dacron cloth, I would look at 6oz dacron for beachcat square top mains.
In terms of thread, V-92 is basically the minimum, V-69 can be used for spinnakers.[/quote]
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