Mumm 30 Tuning Guide - L-36 Fleet

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16 Mumm 30 Tuning Guide CREW WEIGHT IN MEDIUM - HEAVY AIR SAILS When sailing upwind in moderate air; • Have the headsails flaked into their turtles, rolled up and tied. • Position sails forward around the floorboards. • Place downwind sails on the middle bunks. In heavy air; • Have the sails flaked, rolled in their turtles and tied. • Position the sails aft behind the main hatch on each side of the steps. TIPS • When the mainsail flogs upwind, the center of balance is transferred to the headsail. Adjust your helming technique to account for this. Make sure that you have firm vang on. • When overpowered upwind, try easing the mainsheet 150mm (6”) on the fine tune adjustment. • If you feel that you are going slow, drop the traveler down, ease the backstay and mainsheet. • When you adjust the jib halyard, three things change: 1) head depth 2) draft position 3) vertical curvature • When crewmembers shift their weight in response to puffs, do four things: 1) adjust outhaul 2) adjust mainsheet 3) adjust backstay and 4) adjust jibsheet. • When the boat is up to speed and sailing comfortably, have the mainsheet trimmer turn around and hike with legs positioned over the side. UPWIND In moderate air, all the crew will be on the rail. The first crewmember will be situated against the windward stanchion which is located 60cm (24”) back from the shroud. HEAVY AIR In heavy air (13-22 knots) the crew should be hiking as hard as possible, with one person sitting behind the helmsman. Upwind 13-22 knots REACHING Consolidate the crew in the middle of the boat, hiking as hard as possible. In heavy air, the crew should be sitting well aft, and hiking hard. Sailing downwind, balance the crew evenly across the boat. In heavy air, the crew should be across the back of the boat, especially in steep seas. If sailing deep angles, place the entire crew on the leeward rail. Reaching 7-12 knots
MAINSAIL SHAPE Mumm 30 Tuning Guide NOTE: In the following sail photos, depth is listed as a percent of chord length. Draft position is measured as a percent of chord length from the front of the sail. True Wind Speed: 5 knots Top: 12.88 of cord length @ 41% draft position MIddle: 13.32 @ 45% Bottom: 10.27 @ 44% Notes: Set-up for maximum power, more twist is required using the top mast backstay. True Wind Speed: 15 knots Top: 8.30 of cord length @ 46% MIddle: 9.50 @ 50% Bottom: 7.90 @ 46% NOTES: The sail luff is just beginning to lift. 17
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: CREW WEIGHT Crew weight, when used
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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