Centurion06
New member
Hello - I have noticed this type of nomenclature appearing in boat reviews recently I don't understand it can anybody explain for me please
what does "tacking through 75-800" mean
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Tranona
Well-known member
Welcome
That is describing the difference between the heading on one tack and on the other after tacking. The lower the figure the closer winded the boat and the less round lost in the tack.
That is describing the difference between the heading on one tack and on the other after tacking. The lower the figure the closer winded the boat and the less round lost in the tack.
Aeolus
Well-known member
And it's 70 - 80 with a small superscripted o afterwards to indicate degrees.
Refueler
Well-known member
Can I ask a question ?
How many here have a boat that can tack 70 - 80 deg (ie 35 - 40 deg either side of wind ) ? That's pretty good angle ... and most boats I know would be hard pushed to maintain a good speed with such angle ... with most sitting in the 90 - 100 deg or more.
No doubt I am now going to shot at dawn for this .....
How many here have a boat that can tack 70 - 80 deg (ie 35 - 40 deg either side of wind ) ? That's pretty good angle ... and most boats I know would be hard pushed to maintain a good speed with such angle ... with most sitting in the 90 - 100 deg or more.
No doubt I am now going to shot at dawn for this .....
Biggles Wader
Well-known member
I wouldnt know. Im a gentleman and dont bother with all this tacking malarky.
Refueler
Well-known member
I liken it to "Bar stories" .... one-upmanship claiming close winded more than reality ..
We can all 'pinch' a boat - but then go nowhere fast !
When you consider that a Tillerpilot can auto tack ... which usually sits at ~110 deg.
fredrussell
Well-known member
I think mine (Parker 31) might manage 40 degrees off the wind on a good day, but like you say, at the cost of slowing down a bit. Boat has new sails and I keep bottom as clean as possible.
I’ve always assumed when they say 35-40 degrees (usually on modern racey types) they mean without slowing down a great deal to achieve that angle.
I’ve always assumed when they say 35-40 degrees (usually on modern racey types) they mean without slowing down a great deal to achieve that angle.
westernman
Well-known member
Yes. 70-80 degree tack as an angle over ground (COG) is bullshit.
Measuring vs anything else is meaningless.
Very few boats tack through 90 degrees COG unless the tide is against the wind.
Norman_E
Well-known member
My Jeanneau 45.2 could be pinched up to 40 degrees, but sailed much better at 50 degrees. The autopilot was set up to tack through110 degrees, so if single handed I would just bear away to 55 or 60 degrees off true wind to get best boat speed, then push the tack button and get the Genoa through the wind and sheeted in before it became too hard.
EDIT: I had a well cut tri-radial laminate genoa and a good fully battened main. With a set of baggy old sails it would have been much worse.
EDIT: I had a well cut tri-radial laminate genoa and a good fully battened main. With a set of baggy old sails it would have been much worse.
Tranona
Well-known member
It may well be a reference (as I noted) to heading rather than track - and yes there are some boats hat can achieve 80 degrees but unlikely with "normal" cruising boats.
dunedin
Well-known member
It depends on the type of boat / rig - and where the jib sheets go gives a clue:
- overlapping genoa plus sheet tracks on the gunwales, no way, more like 120 degrees
- 110% jib plus sheet tracks on inside of side decks, only short a very short period pinching slowly, more like 90 degrees
- 3D laminate blade jib with sheet tracks, or more likely low friction rings plus inhaulers, on coachroof very close to centreline, yes very feasible
At the race end it looks like a J70 polar diagram shows it with optimum VMG at 33 degrees to true wind, or a tacking angle of 66 degrees. https://www.carpediemsailingteam.com/app/download/16137868/Speed_Guide_J70_Class.pdf
Daydream believer
Well-known member
My Hanse 311 is an AWB from 2003. It is not a race boat. it is a cruising yacht. Albeit a sprightly one.
As stated above, the sail makes a difference. I can pinch much higher with my self tacking jib & lose far less speed than with my genoa. For this reason I rarely use the genny. 40 deg is easily dooable if it is flat water. The sail needs to be set up right & the mainsail balanced to it.
One can see from the vector diags that the beat angle is shown as 39.4/39.3
with a genoa. With a self tackerit is significantly closer winded
Unfortunately I do not have the ST figures only the Genoa figs below
As stated above, the sail makes a difference. I can pinch much higher with my self tacking jib & lose far less speed than with my genoa. For this reason I rarely use the genny. 40 deg is easily dooable if it is flat water. The sail needs to be set up right & the mainsail balanced to it.
One can see from the vector diags that the beat angle is shown as 39.4/39.3
with a genoa. With a self tackerit is significantly closer winded
Unfortunately I do not have the ST figures only the Genoa figs below
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Poignard
Well-known member
I have no idea what mine is.
I am usually too busy trying to find the winch handle and kicking the crew out of the way to be looking at compasses
I am usually too busy trying to find the winch handle and kicking the crew out of the way to be looking at compasses
Daydream believer
Well-known member
Learn to tack sweetly & you would not need the winch handle.
johnalison
Well-known member
Depends on the boat. With a fairly narrowly-stayed mast and forward inners for the 110% jib to get round, our tacking is seldom of the tidiest. In flat water and the right amount of wind we can do it well enough, but in a seaway the idea of getting the jib tight enough by hand is optimistic at best.Learn to tack sweetly & you would not need the winch handle.
LittleSister
Well-known member
I go sailing to get away from performance stats!
jamie N
Well-known member
I believe that an Anderson 22 is a true 70-80 yacht.
Daydream believer
Well-known member
Yes! but you are the sort of bloke who thinks that a Rocna is as good as a fishermans.
VicS
Well-known member
Like this 70 - 80° or 70 - 80o
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fredrussell
Well-known member
This I think is what makes the difference. My boat has a second set of genoa car tracks on coachroof for use with the working jib. With the 135 genoa on, part furled or not, I lose a few degrees.
