Mainsail Trim
Paul,I'm assuming the cause of your battens flying out is due to the leech of the main flogging heavily in the breeze...A sail should never flog in any condition when trimmed correctly...In addition to loosing battens, the flogging will beat/whip the sail material and stitching, which will greatly shorten the life of the sail...Tightening the mainsheet should stop the heavy flogging of the main and stop the battens from working out...If there is too much breeze to tighten the main, then you should be adjusting the traveler car (moving it to to leeward)...If there is still too much breeze to tighten the mainsheet then you probably have too much sail flying and need to reef...On a moderately windy day and sailing to windward, you should have the mainsheet tight (leech should not be flogging when sheet is tight)...If the boat is over-powered with mainsheet tight, you should then drop the traveler car down, NOT loosen the mainsheet---loosening the mainsheet allows the sail to flog...If you do not have a line control, ballbearing traveler car, I highly recommend upgrading to one...On a moderately windy/heavy wind day, it's one of the most important adjustments for the main--not the mainsheet...