Originally Posted by Brettms
My basic problem with the boat has been pointing in club races. The pointing isn't the problem as much as it didn't track where it was pointing. Thanks again!
From what you describe, you probably have adverse leeward 'slip' of the keel, caused possibly by excess draft and draft-aft mainsail *shape* .... AND .... If the wake from the stern of the boat isnt trailing back almost 'straight back' (~ about 3° off of straight back), the keel wont 'lift/fly to weather' and you can easily begin to 'skid' off to leeward.
Skidding off to leeward is more a function of forestay tension than adverse mainsail shape, etc.
Once you get the proper mainsail tensions/shape, then Id suggest you concentrate on forestay tension .... and you really dont need a backstay tensioner to do this but it helps. Proper forestay tension will correct side skid and correct a LOT of what appears to be (so-called) 'weather helm'. Here's how to assure proper forestay tension (if you cant clearly read this, IM me and Ill send a PDF): MatchingLuffHollow.gif picture by svAquila - Photobucket
..... then and only then you can 'futz' around with mast rake to correct for minor helm imbalances, etc. .... but the sail shapes and forestay tension should be 'dead on' before you do any 'mast-raking'.
Once you get the proper mainsail shape and forestay tensions, then I heartily suggest: ArvelGentry.com
---> magazine articles --> (a 'sequence' of sail shaping articles):
Checking Trim on the Wind, November 1973
Achieving Proper Balance, December 1973
Sailing to Windward, January 1974
Are You at Optimum Trim?, March 1974
A properly set up P30 with properly 'shaped' sails should leave those Etchells and Catalina 30s .... way back in the dust.
Id opt for a mainsail to exact P30 dimensions if you want to eventually 'dominate' your fleet as the optimum mainsail size and shape is what makes the 'flow' over and around the jib on masthead rig so 'efficient' .... if you have a 'sub-optimum' mainsail or sub-optimum mainsail shape, the jib will never develop its optimum 'aerodynamics' ... and this is valid for 'any' masthead boat !!!!!!!!