Keel shape and pointing - Page 5 - SailNet Community

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  #41  
Old 06-08-2012
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Re: Keel shape and pointing

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A keel with a sharper leading edge will stall much quicker in rough water, than one with a blunter leading edge. How sharp is best, depends on how rough the water you are racing in, and the resulting leeway angle.
x2. A sharper keel will also stall more quickly than the blunter foil at the slow SPEEDS of the R22, in my understanding. Keel shape and thickness would be optimized (drag, lift, stall potential) for typical expected boatspeeds.

Glad to hear you are racing your Ranger 22, but that sounds like a tough fleet of competition! At least I have some old Catalina 27's to beat.

I appreciate your support on refreshing the photos of the old templates thread. I chose a shape similar to the 0010 but more of a hybrid 0012 profile at 10% thickness. I found this similar to my keel shape which was butchered over the last 34 years. Launching Sunday so wish me luck. . .

In contrast with the previous description of the J/24 with saggy headstay (light airs?) I believe the R22 prefers a tighter jibstay to point in most wind conditions. I just added a cascade to my backstay adjuster for this reason.

Check that you are getting full hoist on the main as I had a halyard shackle/nicropress that was taking up 1/2" at the sheave. Even so my new main is 1/2" shorter than stock. Replaced headboard shackle with a swage ball shackle (as was original). I get the best point with boom on centerline (traveler up). Follow the North Trim prescription--speed first, then point.

BTW I found that there is an online loft that has a new 150 genoa that would fit this boat at a very reasonable price. PM me for details.

You might find some helpful feedback by much more experienced R22 racers on the Yahoo Group mailing list.
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  #42  
Old 06-09-2012
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Re: Keel shape and pointing

Thanks for the comments everyone. Unfortunately I won't be getting to the lake this weekend. Our new crew is unable to make it out for practice, and the wind is gusting to 30. Not a good day for playing around with various sails and trim on a light boat.

Besides I have a hole to patch in my boat.

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Also, get the sailmaker out on the boat.
I think some of you are confusing "guy who sold Bill his sail" with "sailmaker". If I want a sailmaker on the boat, I'll have to buy him a plane ticket and a hotel room. Real sailmakers (who can look at a mis-shaped sail and know whether it's really a cut or measurement problem) are long way away from here.
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  #43  
Old 06-09-2012
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Re: Keel shape and pointing

Bear in mind that if the leading edge of the keel is sloped aft, then what is a round section, becomes an elipse when it is sloped and cut parallel to the waterline.
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  #44  
Old 06-11-2012
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Re: Keel shape and pointing

If you can't get to a sailmaker, take some pictures looking up the sail and email it to 3 or 4 sailmakers. They'll be able to tell you what's going on. Or, you can post them up on this site and we'll take a stab at it.
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  #45  
Old 06-25-2012
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Re: Keel shape and pointing

Finally got back out to the lake for a race this weekend. Only got one pic though. No time ahead of the race as the entire fleet was stuck in the harbor waiting for 40+ mph winds to pass. For the race we had 20-25 with gusts over 30. Main reefed, and flying the 90% up front. I was trimmed more for keeping the rudder in the water than speed. Maybe next time.

I will say though that after tuning the rig our pointing was better. I poked the wrong button on my tracking app and managed to erase the data, but we were pointing with everyone else.

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  #46  
Old 06-26-2012
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Re: Keel shape and pointing

Can't see the picture.
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  #47  
Old 06-26-2012
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Re: Keel shape and pointing

That sail does not look bad except the head batten is looks too stiff.
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Old 06-29-2012
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Re: Keel shape and pointing

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Originally Posted by Jeff_H View Post
That sail does not look bad except the head batten is looks too stiff.
Agreed, the top batten could use a bit of taper or something. More halyard tension wouldn't go amis either. Would like to see the sail fully hoisted.
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