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Re: Overlapping versus Blade headsails which is quicker ?
Its pretty clear that any race boats, not constrained by class or formula rules to a non-overlapping headsail, use the largest genoas permitted by the wind strength.
In a serious race fleet beating to a windward mark in under 18 MPH wind speed, it is unlikely to be a single boat not flying a 150%, other than those boats whose rating/formula/class choses to exclude more powerful headsails. Maybe the more tender boats actually will drop to a 130%...
Thats not the current trend in maxis and other top class boats, especially with frac. rigs with square top mains, etc. The 'trend' is definitely going towards blades instead of large LP overlappers on FRAC rigs.
With mast head boats the only way you can adequately use a large LP is to shorten up the spreader length and usually to keep it inside that 10° tack-clew line.
Many of the one design fleets and 'development classes' are doing the same ...