There is a slight vibration while sailing close-hauled. I just purchased the 1999 Hunter 340 with the B
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Vibrations while under Sail
Kobi, Could it be your propeller turning? Put your gear in reverse if so. Other causes, check your standing rigging stays, the side ones especially and your guy wires. You can purchase a "Nicopress Tension Guage" stay tuning gear for about $90.00 from West Marine which will enable you to tune your rigging.It measures the tension in pounds and you do the adjustments accordling, "NOTE" make sure you purchase the correct size "Cable Diameter Gauge" to fit your rigging size. Its real simple. Good Luck, Barrie
Kobi, Could it be your propeller turning? Put your gear in reverse if so. Other causes, check your standing rigging stays, the side ones especially and your guy wires. You can purchase a "Nicopress Tension Guage" stay tuning gear for about $90.00 from West Marine which will enable you to tune your rigging.It measures the tension in pounds and you do the adjustments accordling, "NOTE" make sure you purchase the correct size "Cable Diameter Gauge" to fit your rigging size. Its real simple. Good Luck, Barrie
Shudder
Take this for what it is worth but I have been told by two peoplle , one a Hunter salesman that the shudder in my 376 means that it is in perfect trim. I do not know if that is correct but we are going fast and require very little steering when it happens. ????
Take this for what it is worth but I have been told by two peoplle , one a Hunter salesman that the shudder in my 376 means that it is in perfect trim. I do not know if that is correct but we are going fast and require very little steering when it happens. ????
Pointing too high for the genoa ......
There are a number of different sources for vibrations when underway under sail, including the rudder and keel. However, the strongest, most consistent source when close-hauled is the genoa. When you are starting to point too high for the genoa set you will generally hear the sail starting too make noise and use this as your cue to bear off a little or to tighten the genoa sheet. The noise you hear in the cockpit is felt in the cabin as a shudder and is caused by the rapid pumping action of the leech. Since the sound and vibration would seem to be due to the laminar flow across the sail being disrupted, I doubt very much that it is a sign of the sails being properly adjusted. Rather, I would sheet the genoa in further until the vibration and sound disappear. If the sheet is already bar tight and you don't want to bear off, you might try to stretch the foot by bringing the jib leads further aft (i.e. moving the car aft) or by sheeting the genoa further inboard, e.g. by pulling the clew to weather with a jackline. In case your forestay sags too much (check with the sailmaker what the maximum acceptable sag is) you may not be able to point high enough without the the sail becoming unstable. In that case I would try to tighten the forestay a few turns, especially if you are also experiencing too much weather helm. Alternatively, with a B
There are a number of different sources for vibrations when underway under sail, including the rudder and keel. However, the strongest, most consistent source when close-hauled is the genoa. When you are starting to point too high for the genoa set you will generally hear the sail starting too make noise and use this as your cue to bear off a little or to tighten the genoa sheet. The noise you hear in the cockpit is felt in the cabin as a shudder and is caused by the rapid pumping action of the leech. Since the sound and vibration would seem to be due to the laminar flow across the sail being disrupted, I doubt very much that it is a sign of the sails being properly adjusted. Rather, I would sheet the genoa in further until the vibration and sound disappear. If the sheet is already bar tight and you don't want to bear off, you might try to stretch the foot by bringing the jib leads further aft (i.e. moving the car aft) or by sheeting the genoa further inboard, e.g. by pulling the clew to weather with a jackline. In case your forestay sags too much (check with the sailmaker what the maximum acceptable sag is) you may not be able to point high enough without the the sail becoming unstable. In that case I would try to tighten the forestay a few turns, especially if you are also experiencing too much weather helm. Alternatively, with a B
Is your shaft loose/turning
I had an experience where we had a vibration and traced it back, too late, that the shaft was vibrating loose from the alignmant plates at the transmission. You may want to place your transmission in reverse and see if the vibration stops. If so, it's generally the turning of the prop thru the water. No biggie. However, you may want to check further to see if the shaft is coming loose from the any connection from the rear of the transmission on back. What was interesting was the vibration did not occur under power, and developed only while we were sailing close hauled in a very stiff breeze. We pointed into the wind to drop the sails and head to the slip, only to find out the shaft and alignment plates had worked loose and the shaft was extending backwards out of the boat. yep, needed a tow. Regards Capt Terry Griggs
I had an experience where we had a vibration and traced it back, too late, that the shaft was vibrating loose from the alignmant plates at the transmission. You may want to place your transmission in reverse and see if the vibration stops. If so, it's generally the turning of the prop thru the water. No biggie. However, you may want to check further to see if the shaft is coming loose from the any connection from the rear of the transmission on back. What was interesting was the vibration did not occur under power, and developed only while we were sailing close hauled in a very stiff breeze. We pointed into the wind to drop the sails and head to the slip, only to find out the shaft and alignment plates had worked loose and the shaft was extending backwards out of the boat. yep, needed a tow. Regards Capt Terry Griggs
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