摘要 |
Reefing apparatus for a sail of a sailing boat makes use of a hollow boom for the sail. The boom has a lengthwise slit in the top extending over the length of the sail footrope and contains a tubular shaft which can rotate within the boom and to which the footrope is attached. A second shaft is located within the tubular shaft and is coupled to the tubular shaft by a spring, which is stressed on rotation of the tubular shaft relative to the second shaft. |