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Re: Overlapping versus Blade headsails which is quicker ?
IMHO, self-tackers without a boom are pretty much useless, but I'm not expecting anyone to share my small thought on the matter.
Totally agree you. Without a (vanged) 'boom' or clubfoot there is no effective way to control 'twist' when the clew is outboard. This is usually always seen especially on cutter rigs with only staysl and reefed main flying ... without a means to prevent the clew from rising, the upper panels of the stay'sl will be unattached to airstream flow/stalling, the foot overtrimmed and only a small zone of the middle part of the sail 'actually' working ..... same thing with almost ANY jib when the clew is well outboard. Even with fore/aft fairlead, etc. adjustment, etc. to control clew height ... with a sans 'boom' arrangement the jib will 'naturally' become deeper drafted .... more powerful but 'slower' when the clew is well 'outboard'. FLAT is faster in most conditions (in relatively flat water, etc.)
In the olden days before the 'rules changes' ... a reaching strut or jockey pole was used to help control the 'clew rise'. The Hoyt Boom in this respect is perhaps the best way to do this ... but unfortunately is impossible to apply to an 'overlapping' jib/genoa.