Tuning & Sail Trim

Published on October 24th, 2014 | by Moore 24 Class


Moore 24 Sail Trim – by Dave Hodges


  • Drive on jib
  • Go outboard with lead when overpowered - this can be like changing headsails
  • When you go to the rail with a sail, it gets very flat
  • When sheeted outboard, the boat will not point as well, but when you are heavily heeled you go sideways, which is very slow
  • Keep foot flat - top out
  • Move the lead aft, beyond where you think it should be
  • Don't spend time sitting inboard trimming the jib, get out on the rail even if trim is not perfect
  • Having weight on the rail is more advantageous than perfect trim


  • It is easy to sheet too tight
  • Keep leach 6-12" off spreader when foot is tight on the shrouds
  • Pull in tight quickly after a tack and get on rail


  • Use when there are lumpy seas, have plenty of crew weight, and can't carry #1
  • Keep leach 1" off spreader - trim tight
  • If crew weight is light - go to #3, you can point higher with the 3 than with the 2


  • When at the bottom end range of 3 (feel slightly underpowered), leave backstay off, 3 is cut flat has no shape
  • Move lead notch forward on bottom end conditions
  • In bottom end conditions - trim so that the leach is 4" inside spreader tip
  • When you have heavier breeze, keep the leach at the tip of the spreader, this is done by moving lead aft and twisting the sail, which will flatten the foot


  • Use main for heel control
  • 12° heel is the most you want
  • Keep boat flat - very fine line between speed and point
  • Put on Main Flattener before you go to the outboard jib lead
  • When you pull on the backstay - pull in the mainsheet to keep the leach tension consistent
  • Backstay flattens main and jib
  • Keep backstay on when tight reaching with the spinnaker - this flattens the main and helps you stay in control
  • Vang is your horsepower on Main when downwind with the spinnaker up
  • 600 lbs. is light crew weight
  • If light weight - sail with looser leach in main
  • Keep the top telltale on the Main full and not stalled
  • When you come out of tack dump the main if the boat heels over too much
  • When the boat heels too much, pull on the backstay first
  • Use vang as well to flatten main
  • In light air, use loose backstay until you have weight on the rail


  • M24 has a wide chute which is easy to choke - keep sheet lead far aft
  • Pole down opens leach
  • In most cases keep the clew and tack even
  • When reaching, have the tack slightly lower than clew - this will pull the draft forward and opens the leach

Light Air

  • When buried don't try to point - go for speed, sail loose, sail with lots of twist
  • Ease sheets when going slower than other boat
  • Have the main top telltale stalled in light air 50% of the time


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