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Tuning Guides

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Class:Flying FifteenSpreaders
Mast:M2
Crew Weight:
A
175mm
B
422mm
Wind speed knots1-67-1011-1516-2021+
Mast rake7570mm7570mm7570mm7520mm7470mm
Rig tension loos pro rig gauge23 300 lbs25 350 lbs25 350 lbs25 350 lbs27 400 lbs
Mast at deckPre bend 30mm0mm to 5mm0mm to 5mmPre bend 10mmpre bend 20mm
OuthaulEase 20mmEase 10mmTightVery tightVery tight
Kicker/VangZeroTake up slackMediumMaximumMaximum
ReasonTop tell tale will stall2nd top tell tale should be stalling 70% of time2nd top tell tale should be stalling 70% of timeTo control twistand blade out mainsailTo control twistand blade out mainsail
Cunningham (close hauled)ZeroZeroZeroMediumMaximum
MainsheetVery little, do not close leachTry to keep boom on centreline, use sufficient to control leech twist as for kickerTry to keep boom on centreline, use sufficient to control leech twist as for kickerEase to keep boat balanceEase to keep boat balance
Genoa/Jib from centreline400mm400mm400mm400mm445mm
Genoa fairlead from transom2700mm2800mm2800mm--
Genoa/Jib from centreline3150mm3150mm3090mm3090mm3070mm
Jib luff tension wrinklesWrinklesWrinklesNo wrinklesTightTight
Jib sheet tensionSheet so all luff tell tales stream togetherSheet so all luff tell tales stream togetherSheet so all luff tell tales stream togetherTight but ease in gustsTight but ease in gusts


Mast rake: is measured from top black band ie tape measure should read 6248mm to top of black band at goosneck then read rake at top of the transom.

Pre-bend: Rig tension on, main halyard tight to goosneck, pre-bend equals distance at spreader height from mast track to halyard.

Datum: this is a pre-bend of 25mm at spreader height.

Cunningham: May also be used on a fetch in strong winds as will as a spinnaker reach as a last resort. This flattens the sail, opens the leech and spills the wind.

Mast position at heel:
mould 10 - aft bearing point to bulhead 146mm
mould 9 - aft bearing point 93mm from centreline od first set of kell bolts

New Jib: Track 150mm further forward

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