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on the backstay pennent. The double block is next attached to the bale on the
bottom of the boom which is over the other main sheet blocks. Its sheaves run
across the boat. If you have end boom sheeting you will attach your fiddle
block with cam cleat to the bridle provided on the transom. Then attach single
block to end of boom where boom bail and/or topping lift bar (depending on boat
model) are provided.
The main sheet is dead ended on top of the block on the starboard side of the
companionway. It is led through the double block's aft sheave and down through
the block on the port side of the cabin. Once again up through the double block
and down through the block on the starboard side. Thence through the fairlead
and cam cleat aft 'of the starboard block.
D. TUNING THE MAST
Final and accurate tuning of your mast should be done during or after sailing.
However, it will be necessary and possibly sufficient to rough tune your mast
on your trailer or in the water before sailing.
The mast may be brought to the straight position across the boat by applying
equal tension on each upper shroud and insuring that equal amounts of thread
show on each of the upper shroud turnbuckles. The pressure on these shrouds
should be firm, but not straining. A possible guide would be to tighten the
turnbuckles all you can by hand and then a turn or two more with a pair of
pliers and a screwdriver. The shroud should deflect about three inches when
pushed six feet above the deck. Again the shroud should be firm, but not too
tight.
The lower shrouds should be set up in the same manner, checking along the mast
track (back edge) and seeing that the mast remains straight.
The headstay and backstay are set up in the same manner except slightly more
pressure than used for the upper shrouds. It is important to find a balance
between having the head stay tight enough to keep the jib luff from falling off
too much in a breeze, and excessive rigging load.
If the headstay and/or backstay are tightened for competition, we recommend
loosening the rig after racing.
Final adjustment should be made while sailing in a 8-12 knot breeze. Observe
bend in the mast, then tack and adjust the now loose shrouds to arrive at a
straight mast when you tack back. Do not attempt to tighten the rigging on the
windward or loaded side.
E. SETTING AND TRIMMING THE MAINSAIL
Your mainsail is designed to fit the special characteristics of your particular
boat. Full consideration has been given to your boat's weight as well as mast
and boom deflection, if any.
Your sail is designed so as to place the maximum draft (deepest portion) of the
sail 40 to 50% aft of the luff, (leading edge.) The draft of your new main can
be moved forward by INCREASING luff tension. Conversely, it will move aft if
the luff is relaxed.
