I'd like to know if 4.5 - 5 kts is about peak performance using main and jib on a beam reach with 15kts wind. Basically, to say another way, heading north with wind coming from 240 to 270 degrees, in 1 - 3 foot seas ?? I'm not sure what would be optimum and whether a spinnaker would help. Given some days we only see 1 - 10 kts wind, would a spinnaker (or genoa) help improve performance? The other night we had one of those 'fantastic' NE weather patterns of full moon, stars, 10 - 15kts westerly - s westerly, while sailing from Salem, MA to Portsmouth, NH (end of season sail to winter storage) .. GPS claimed we were doing 'up to' 5.5 kts, with the average around 4.5 kts. Wind velocity as measured by weather forecast guestimates, but certainly neever felt like much over 15 kts. Thanks, Bob E s/v Second Nature
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Jack Laird
Should be going faster.
Work on sail trim. I assume that you are using a 155% geny. If not that's first, before a spinnaker. Not unusual to reach hull speed with 15 mph wind and a nice reach.
Work on sail trim. I assume that you are using a 155% geny. If not that's first, before a spinnaker. Not unusual to reach hull speed with 15 mph wind and a nice reach.
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Andy
Seems slow
We have the same model/year boat shoal-draft. I question our instrument's accuracy but it registers 6-7 knots, sometimes more, (hull speed) in even lighter winds on Lake Erie. We are considering getting GPS over the winter in part to get a more accurate reading (at least I have been told it is). From information in other posts on this site and our limited experience it would seem you should be getting 6 plus knots. Andy
We have the same model/year boat shoal-draft. I question our instrument's accuracy but it registers 6-7 knots, sometimes more, (hull speed) in even lighter winds on Lake Erie. We are considering getting GPS over the winter in part to get a more accurate reading (at least I have been told it is). From information in other posts on this site and our limited experience it would seem you should be getting 6 plus knots. Andy
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Ed Schenck
Wonder what is up with that?
Even poor sail trim shouldn't slow you that much in 15K winds. Reminds me of an old joke, he/she complained her new ski boat was too slow. Marina told him/her to leave the trailer on shore. Last week in similar winds my H37, a cutter, was making 6.5 knots with only jib and main. This was born out by the GPS which was close to 8.0 mph. It was pulled yesterday and the bottom was smooth and looked fast, no growth.
Even poor sail trim shouldn't slow you that much in 15K winds. Reminds me of an old joke, he/she complained her new ski boat was too slow. Marina told him/her to leave the trailer on shore. Last week in similar winds my H37, a cutter, was making 6.5 knots with only jib and main. This was born out by the GPS which was close to 8.0 mph. It was pulled yesterday and the bottom was smooth and looked fast, no growth.
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MERRILL RAY MASSE (H37C PERSISTENCE)
HUNTERS PUBLISHED HULL SPEED
BOB, HUNTERS PUBLISHED HULL (MAXIMUM) SPEED FOR THE 75-84 H27 IS 6.2 KNOTS. I BELIEVE THE FORMULA IS 1.32 TIMES THE SQUARE ROOT OF THE HULL LENGTH AT THE WATER LINE IN FEET. THUS ABOUT 1.32 TIMES 4.69 (THE SQUARE ROOT OF 22) GIVES YOU ABOUT 6.2 KNOTS. THAT'S ALL THERE IS NO MATTER HOW YOU PROPEL THE BOAT. MERRILL s/v PERSISTENCE (H37C)
BOB, HUNTERS PUBLISHED HULL (MAXIMUM) SPEED FOR THE 75-84 H27 IS 6.2 KNOTS. I BELIEVE THE FORMULA IS 1.32 TIMES THE SQUARE ROOT OF THE HULL LENGTH AT THE WATER LINE IN FEET. THUS ABOUT 1.32 TIMES 4.69 (THE SQUARE ROOT OF 22) GIVES YOU ABOUT 6.2 KNOTS. THAT'S ALL THERE IS NO MATTER HOW YOU PROPEL THE BOAT. MERRILL s/v PERSISTENCE (H37C)
B
Been there
Hull speed is not a maximum
Hull speed is just the speed of a water wave whose length equals the vessel's waterline. Boat's frequently sail faster than their hull speed -- it just takes the right conditions.
Hull speed is just the speed of a water wave whose length equals the vessel's waterline. Boat's frequently sail faster than their hull speed -- it just takes the right conditions.
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Greg
You should do better!
5.5-6 knots or better is what you should be doing. Here are some things to check. 1) Is the bottom clean? 2) Are you dragging anything...a dink? 3) Is anything else dragging in the water? 4) When was the last time you checked your standing rigging to be sure it is still in tune? 4) Are your sails adjusted correctly...down haul, out haul, halyard hoisted properly and secured, Genny hanked on fully or unfurled all the way? 5) Use a GPS to be sure of your speed 6) Take another experienced sailor along to verify you are doing everything possible to achieve a good speed 7) What is the condition of the sails...blown out and old or new and the best cuts and fabrics? Look first for the simple answers then if not solved proceed with more complex solutions until a remedy is discovered. Remember...sailing is fun!
5.5-6 knots or better is what you should be doing. Here are some things to check. 1) Is the bottom clean? 2) Are you dragging anything...a dink? 3) Is anything else dragging in the water? 4) When was the last time you checked your standing rigging to be sure it is still in tune? 4) Are your sails adjusted correctly...down haul, out haul, halyard hoisted properly and secured, Genny hanked on fully or unfurled all the way? 5) Use a GPS to be sure of your speed 6) Take another experienced sailor along to verify you are doing everything possible to achieve a good speed 7) What is the condition of the sails...blown out and old or new and the best cuts and fabrics? Look first for the simple answers then if not solved proceed with more complex solutions until a remedy is discovered. Remember...sailing is fun!
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Pete
gps readings
you mentined that you "averaged" 4.5 kn that is not bad! remember that includes all the time you had the gps on! 5.5 being top speed is speed over ground not boat speed and you need to adjust for fair or foul currents etc. You should be able to sail a hull speed on a normal basis in the right conditions! Besides checking all the other mentioned idea (clean bottom etc.) don't put to much faith in one trip in one direction as a test! Now you have all winter to figure this one out!
you mentined that you "averaged" 4.5 kn that is not bad! remember that includes all the time you had the gps on! 5.5 being top speed is speed over ground not boat speed and you need to adjust for fair or foul currents etc. You should be able to sail a hull speed on a normal basis in the right conditions! Besides checking all the other mentioned idea (clean bottom etc.) don't put to much faith in one trip in one direction as a test! Now you have all winter to figure this one out!
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