Does anyone have an address where I can download the Doyle Boston Tuning Guide? Having some pointing problems and would like to get a copy of it for reference. Thanks
John
Doyle Boston 7.9 Tuning Guide
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Spike Boston
- Posts: 115
- Joined: Thu Jan 16, 2003 2:03 pm
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John O'Hara
- Posts: 4
- Joined: Mon Jul 03, 2006 9:37 am
Tuning guide
Thanks Spike, my e-mail address is: johara@twcny.rr.com We bought #222 last Fall and love the boat! Can't seem to point as high as I think we should however and suspect it's the way the rig is tuned. Appreciate your help.
John
"Syncopation"
John
"Syncopation"
pointing
John, something to remember. The 7.9 has a very thin keel with a relatively fine leading edge. This causes the keel to be more prone to stall when trying to point too high. Keep your speed up, make sure that the Genoa is breathing [not over trimmed] and be sure that you don't have the main halyard too tight. Having the draft too far forward in the main is really bad for pointing. Don't let the black band at the top of the mast be the deciding factor. When the halyard is set correctly [for the wind conditions] on a non-rotating mast there should be some horizontal wrinkles on the lower luff of the sail. I'm not telling you that you are doing it wrong. This is just one of the most common mistakes that sailors make.
Dave
Bullet Sails
Dave
Bullet Sails
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John O'Hara
- Posts: 4
- Joined: Mon Jul 03, 2006 9:37 am
Re: pointing
Good suggestion Dave, I'll play around with the halyard tension and see how it affects pointing. Thanks.
John
John
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Fred Chadsey
- Posts: 49
- Joined: Fri Oct 17, 2003 5:43 pm
- Location: gulf shores, al.
pointing
Pointing issue discussed, I find quite opposit tuning. We have not been beat by S2 7.9s or J24s in several months. Most important in getting your S2 to point is mast rake, we have 32" of rake and point very high tack through 75 degrees sometimes better in heavy air, less in lighter air. Shroud tension is important ! Now, mainsail should be flat in 10k or better luff tension should be controled by cunningham not halyard after sail raised (lets you vary draft ). We put a flatner in our mainsail and above 12k this allows more main sheeting. We always vang sheet in 10k or above. Over trimming mainsail will slow you down!!!
S2 7.9 hull # 467
tuning
Opposite from what and do you have any competition? No matter how much rake you measure in inches, 31' 8" is the maximum class legal pin to pin headstay length that you can use and you can't shorten the mast or anything else tricky like that so IMHO, measuring the rake the way that you discribe is moot, with all due respect.
Dave
Dave
Headstay length
I sail PHFR and was wondering if there was any advantage to lengthening the headstay beyond 31'-8". Has anyone done it and is there a reason you can't for PHRF?
phrf
I sail almost exclusively PHRF too. If you start getting more aggressive with mast rake you wind up loosing downwind. IMHO [30 years racing keelboats] if I could get that last little bit of advantage from my boat and it was an upwind/downwind trade off, I would choose downwind. I would rather get to the weather mark in a decent position and have the boatspeed/angle to be in the lead [or close to it] at the leeward mark than to get to the weather mark first in every race only to have the other boats pass me downwind. I think that too many folks put way to much effort into optimising there boat/gameplan for upwind. If you get to the leeward mark in first all that you have to do is cover. Sure, it's not always that cut and dried but then again, nothing ever is when it comes to racing sailbaots. The point that I try to remember if I may find myself a little off the pace upwind [not often] is that being the trailng boat in a close pack gives me the advantage downwind because I will get the puffs/shifts first and can choose what to do with them while the boats in front can only react to what I do.
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Fred Chadsey
- Posts: 49
- Joined: Fri Oct 17, 2003 5:43 pm
- Location: gulf shores, al.
MAST RAKE
Our headstay lenght is maxed out @ 31'-8" and we tune outboard shrouds 31lbs. We race in GORC circuit and there is quality competition. Key West Champion of 2000 was S2 7.9 from our fleet. I agree down wind is slower but being early round the windard mark is best ! We do raise the board and make up for difference in down wind performance. Note the j24s are also raking mast, cutting off mast, and moving mast step. We do race PHRF and they are attacking our rating. We also use a pole on reaches which most boats don't seem to do, our boat is faster with pole than without. (pole to lew up to 60 egrees apparent).
S2 7.9 hull # 467
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Fred Chadsey
- Posts: 49
- Joined: Fri Oct 17, 2003 5:43 pm
- Location: gulf shores, al.
mast rake
Oppss! My crew chief just reminded me headstay @ 31'-9 1/2". My sail maker Schurr races S2 7.9 and advised us to that lenght, he also cut our main to the rake. Thanks for return comment Dave.
S2 7.9 hull # 467