Gybing The BiSymmetric*
11 July 2019 | 630 Miles West of Shark Bay, West Australia
Day 34 8pm Thursday 11th July 2019
The great advantage of the BiSymmetric* is that it is very stable but does have the complication that there are many sheets and lines that must be attended to. By easing the sheets a little at a time it is quite easy to furl the sail with a small winch and it's continuous line. The pole can then be dipped, disconnected from the mast and passed to Starboard while re running the down haul and feeding the windward sheet. The main is then gybed and its preventer, running from the bow, is switched to the leeward side of the boom and the lee sheet of the twin is fed through a block on the end of the boom down to a block on the main track and back to the main winch. Both headsail sheets are then taken in as the furler is released in stages and the sail then filled and trimmed. Though a little complicated this ensures that the main boom is always under control and in no danger of an unexpected gibe with the extra problem of it being swept along by the headsail; further the BiSymmetric* being quite large at 80 square metres has limited opportunities to tear or snarl. Even though this is only day two of its use the extra speed and comfort is really appreciated - we have averaged over seven knots in an often quite light following breeze.
* (attrib W.H. 1939- )