Mumm 30 Tuning Guide - L-36 Fleet

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TWS – True Wind Speed 24 Mumm 30 Tuning Guide SAIL RANGE CHART 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Overlap Heavy Headsail 60 Overlap Medium Headsail Overlap 70 Light Headsail Frac. Asy. Asymmmetric or Symmetric Spinnaker 80 90 100 110 Both Sails TWA – True Wind Angle 120 130 140 150 Fractional Spinnaker .75 Masthead Spinnaker Overlap 30/20 20/20 Masthead Spinnaker No Mans Land 170 160 180 How to use this Chart: Select True Wind Speed (TWS) on the vertical bar and True Wind Angle (TWA) on the horizontal bar. Where the two intersect will tell you what sail should be used. If this point falls within one of the overlap areas, there will be little or no speed difference between the two sails.
RUNNING RIGGING LIST Mumm 30 Tuning Guide Halyards MAINSAIL Tapered Technora ® with captive D-shackle GENOA Tapered Technora with snap shackle SPINNAKER Tapered Spectra ® with snap shackle Sheets GENOA 100% Spectra core/Polyester cover with J-Lock Jr. shackle SPINNAKER Tapered Spectra with snap shackle ASYMMETRIC CLEW STRAP Eye-to-Eye Spectra AFTERGUYS Tapered Spectra with snap shackle • In Spectra and Technora rigging, chafe is your enemy. When the covers wear, exposing the core, the breaking strength of the halyard or sheet is greatly reduced. • After a windy series, double-check all sheets, guys, and halyards for chafe. As a quick fix, tape over worn areas, and replace as soon as feasible. • Teflon tape works extremely well, and is available from North Sails Rigging. The trade-off between performance and weight means the rigging is not ‘overbuilt’ for the loads onboard the Mumm 30. • On most boats, the halyards and sheets should be replaced every year. If you have a busy racing calendar, spare halyards and genoa sheets are recommended. 25
Page 1 and 2: SOLUTIONS FOR TODAY’S SAILORS MUM
Page 3 and 4: TABLE OF CONTENTS Mumm 30 Tuning Gu
Page 5 and 6: SETTING UP THE RIG The challenge an
Page 7 and 8: SETTING UP THE RIG Off Mumm 30 Tuni
Page 9 and 10: GENOA TRIM Set-Up 3DL headsails are
Page 11 and 12: Mumm 30 Tuning Guide SYMMETRIC SPIN
Page 13 and 14: Mumm 30 Tuning Guide GYBING THE ASY
Page 15 and 16: CREW WEIGHT Crew weight, when used
Page 17 and 18: MAINSAIL SHAPE Mumm 30 Tuning Guide
Page 19 and 20: LIGHT HEADSAIL SHAPE Mumm 30 Tuning
Page 21 and 22: Mumm 30 Tuning Guide HEAVY HEADSAIL
Page 23: Mumm 30 Tuning Guide MASTHEAD SPINN
Page 27 and 28: Mumm 30 Tuning Guide 1997 PERFORMAN

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