Funny thing about that:
Here is a funny thing about main dimensions, which I went through myself. So I think I can help on this: The official specs for the main show a 20'6" luff, and an 8' foot. This is on most sites, and sailrite lists these dimensions for their replacement sail for the O22 This is for the more common "masthead rig, that is... the later, and less common, fractional rig has different dimensions as the mast is higher. You can tell the difference by your forestay... the forestay goes to the top of the mast with the masthead, and goes only part way up the mast on the fractional. Anyway, I have the masthead rig, and used the 20'6" luff dimension to re-cut a sail I had. It worked great, but the boom was low. It got in our way, and looked lower than most of the pictures I had seen of other O22's. Well the funny thing was that I had turned down a mainsail a guy was selling which had an "O" with a "22" in it, because the luff was only 19'3", or 19'4"! But when I saw the problem with my longer sail, I called him back, and bought the sail. It fits like a charm, and the boom is where it is for everyone else. So "go figure". I never saw a 19'X" dimension for the luff of an O22 written down anywhere, but it appears that all boats were sold with this as the luff dimension! As for how it is attached, the foot's bolt-rope is slid in the track of the boom, with no slugs, and the main has 7/16" slugs. The flat end slugs which came with the sail do not work as well as the round end ones, which do not tend to jam in the track. The tack of the sail has a grommet, and the little bar on the boom goes through this and turns to lock. The "outhaul" pulls out the foot of the sail, runs through the closest little hole in the outer boom casting, and back to the little cleat on the boom. Rich.
