Mumm 30 Tuning Guide - L-36 Fleet

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4 Mumm 30 Tuning Guide DECK LAYOUT Deck plan drawing supplied courtesy of Bruce Farr & Associates, Inc. and Farr International Headsail Barberhaulers Headsail Sheet Spinnaker Sheet Foreguy Bobstay Spinnaker Tweakers Backstay Spinnaker Guy
SETTING UP THE RIG The challenge and fun of One Design racing begins with having your boat optimized for top performance. To get the best out of your new Mumm 30, first be sure the rig is in the center of the boat. Then you can set mast rake, forestay & backstay length, and set the tension on the cap shrouds and diagonals. To center the rig: • Use a tape measure on the centerline halyard from the hounds to the chainplate pin centers. • Place a mark on the front center of the mast at the bottom spreader. • From this point measure to the chainplate pin centers. This provides two points to look through when gauging mast tune. (c) Mumm 30 Tuning Guide NOTE: All measurements are taken to the centerline of clevis pins, bolts, etc. Please refer to diagram1 for specific measurement locations. a) 3.481m (11’ 5”) From below decks, measure from the forward bolt of the stemhead fitting to the forward side of the mast above the mast plate. b)1.146m (3’ 9”) Distance from the aft face of the forward bulkhead to center of the mast screw on the starboard side. NOTE:Distance to the base of the mast fitting is 50mm - 2”. c) 2.329m (7’ 7-3/4”) Distance from the bottom of the mast step to the top of the bottom band (BAS). d) 3.290m (10’ 9-1/2”) ‘J’ measurement Taken from the forestay pin to the front edge of the mast, excluding the spinnaker pole track and above the mast partners. 15.19m (49’ 10”) Max hoist using the main halyard to the intersection of the hull/transom with no load on the backstay. MAST PARTNERS - With the mast at maximum J, make sure the mast partners are secure. Avoid pointloading the mast by spreading the load evenly around the spar. (b) (d) (a) 5
Page 1 and 2: SOLUTIONS FOR TODAY’S SAILORS MUM
Page 3: TABLE OF CONTENTS Mumm 30 Tuning Gu
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 and 24: Mumm 30 Tuning Guide MASTHEAD SPINN
Page 25 and 26: RUNNING RIGGING LIST Mumm 30 Tuning
Page 27 and 28: Mumm 30 Tuning Guide 1997 PERFORMAN

Mumm 30 Tuning Guide - L-36 Fleet

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