by JoeCB » Tue Mar 26, 2013 12:57 pm
Yes, it sounds like you have it right. The plywood plank that the keel (garboard plank) has to rest flush on the keelson and the ribs. The edge of the keelson that mates to the garboard should have it's surface planed to match the varying angle of the ribs as you move forward from the transom to the stem. When you examin the ends of the original ribs you will notice that they are cut at an angle the does not match the keelson (enter keelson board) ... there is a reason for this. The angle cut creates limber holes allowing bilge water to drain back toward the transom, otherwise it would be trapped between each pair of ribs.
Joe B