CDI Turnbuckle Adjustment

[Kohi]

Hi Guys,

I'm in the process of fitting a new luff to the CDI furler on my 26M.

To help with the fitting, does anyone have a guideline regarding how tight the turnbuckle should be tightened when fitting the CDI furler?

i.e. roughly how far in should both pins be screwed? e.g. should one be all the way and the other half way?

Any guidance would be much appreciated!

Many thanks,
Richard.

[Québec 1]

My method was adjusting the long screw thing in the furler until my mast was straight when all tied up. Trial and error.
Q1

[Sumner]

When you turn the turnbuckle the two should screw in and out at the same time and the same amount. We have a...



... Johnson Lever on the bottom of the forestay so I adjusted the new shrouds and new forestay with the loos gauge and the mast rake to where I 'guessed' I wanted it. I did this without the luff on the CDI. Then I didn't touch the turnbuckle, just released the Johnson Lever and unpin the forestay. That way it stays adjusted. Then I installed the luff and drum and sail.

I'd recommend spending the money on the loos gauge to get equal tension on the shrouds and to see what you have them and the forestay set to. I used figures close to what comes with the gauge. I'm sure our rig is a lot tighter than a lot of the boats out there. I know it is a lot tighter than before we owned the gauge.

More on our rigging here....

http://purplesagetradingpost.com/sumner ... ng-24.html

Sum

Our Endeavour 37

Our Trips to Utah, Idaho, Canada, Florida

Our MacGregor S Pages

Mac-Venture Links

[mastreb]

Sum, how do you like that lever? I bought one, but then dropped my mast and have been reluctant to make any forestay mods after that experience.

[Sumner]

Sum, how do you like that lever? I bought one, but then dropped my mast and have been reluctant to make any forestay mods after that experience.

Love it. The rigging stays at the tension I set it at without having to mess with the turnbuckle. I don't know if you read the page that I had a link to...

http://purplesagetradingpost.com/sumner ... ng-24.html

...but if you did you will see that I went with a Johnson Lever one size up from what most use. Since I increased the forestay to 5/32's it didn't make much sense leaving all the other hardware sized for a 1/8th inch forestay strength wise. We have hashed the different forestay sizes to death on here so I'll just leave it at if you stay with a 1/8th forestay then not much point going to the C. S. Johnson Model #14-210 lever we have...

http://www.csjohnson.com/marinecatalog/00032.htm

... It is a little longer and that in conjunction with the CDI and the toggles resulted in me moving the forestay up the mast some. I believe that most people use the #14-205 with the 1/8th inch forestay.

In my case since I was also making up new shrouds at the same time moving the forestay and shrouds up the mast didn't present any real problems and I feel has some other positive benefits that out way moving the CP a little higher. One is that now we still have the original forestay that can be pinned inside of the CDI furler and can/could still use our hank-on sails on that forestay or a smaller storm jib that we will buy or sew. The biggest benefit for sure is that now we can see under the sail. Ruth loves that to no end. Just that part alone made it worth it. I like to keep her happy as she sure keeps me happy.

All in all if someone can, adding the lever can sure make setup much faster, easier and you will end up with the same tension time after time,

Sum

Our Endeavour 37

Our Trips to Utah, Idaho, Canada, Florida

Our MacGregor S Pages

Mac-Venture Links

[gyroplanes]

... It is a little longer and that in conjunction with the CDI and the toggles resulted in me moving the forestay up the mast some.

Any idea of the number? I have a Johnson lever I would like to install on the Jib Stay, I chickened out at the math needed to raise the stay.

I solo sail a lot and would appreciate the visibility under the Genoa. I also plan to start making some trailering trips and that lever sure would seem to help in setup.

Somehow, over the winter last year, my rigging changed. My mast had a distinct aft bend from the shrouds up and the aft stay was relatively loose. The jib stay was looser than ever on assembly as it is usually a "pull hard and pin" event to set up. A mystery I will tackle on the hard this spring.

Thanks in advance, Tom

[Sumner]

... It is a little longer and that in conjunction with the CDI and the toggles resulted in me moving the forestay up the mast some.

Any idea of the number? I have a Johnson lever I would like to install on the Jib Stay, I chickened out at the math needed to raise the stay.

Ok I went out and measured and added some pictures and text to the web page I linked to above. Now remember that is on a S and this is all for the components that I used and how I wanted things, not necessarily the measurement you need. Ok now I'm just going to paste in what I added to the web page.

http://purplesagetradingpost.com/sumner ... ng-24.html

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Ok how much did I move the new forestay up the mast?



The bolt hole for the new hounds/forestay is 23 1/4 inches above the bolt hole for the original hounds/forestay. It could of been a little lower considering a couple of things.

I had the forestay made up a few inches longer than was needed for the CDI.

Also the lower toggle is a little redundant since the bottom of the CDI drum acts like a toggle, but I do like the fact that we have toggles at the extreme ends of the furler/Johnson Lever/forestay combination. That can't hurt and would relieve any stress below the bottom of the CDI drum. Also if your forestay was 1/8th inch and you went with the shorter Johnson Lever that would also shorten the distance from the foredeck. to the hounds and result in them being lower.

One last thought on this is that the 23 1/4 inches might seem like a lot but if you look....



.....at the above picture you will see that the bottom of the sail isn't that much higher so the center of pressure hasn't been raised that much. The big, big gain for us and especially Ruth is that now you can see ahead under the sail.

Above the original jib halyard is attached to the gin pole as I had just raised the mast. It is still attached to the original hounds on the mast. Now take the bottom of that line and and imagine attaching it to the deck just aft of the bottom of the Johnson Lever.....



..... like to the new mount I made when I made the anchor bow rollers. If you put a sail on it the sail would be just a little lower than the new setup. I don't think many people would ever notice the difference in sailing or heeling.

The advantages are great in that now you can pin the forestay quickly and with always the same tension with the Johnson Lever and you have more improved forward vision on the boat and of course a furler sail that is just a world of difference vs. a hank-on in terms of ease of use.
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Hope this helps,

Sum

Our Endeavour 37

Our Trips to Utah, Idaho, Canada, Florida

Our MacGregor S Pages

Mac-Venture Links

[Catigale]

With my Johnson lever on my the forestay went up about 5 inches. On my project list next spring .....put forestay back on the hound, take the. 5 inches off the length with a replacement stay ( keeping the old one as a spare) and putting toggles on both ends.

[vizwhiz]

Cat, are you saying you're going to take the Johnson Lever off of your forestay?

[Highlander]

With my Johnson lever on my the forestay went up about 5 inches. On my project list next spring .....put forestay back on the hound, take the. 5 inches off the length with a replacement stay ( keeping the old one as a spare) and putting toggles on both ends.

So are u going to shorten the length of ur jib/genny to compensate as uwill need to shorten the luff foil !

J

[Catigale]

Maybe not...... I thought I had the 5 inches to spare up top but I think you are right on the luff needing a big mod....

[Phil M]

So what does one end up doing with your furler or hound or headstay when you sail an ? I want to install a Johnson lever to allow a substantial increase in shroud tension, but trying to figure out whether to a) buy another hound and install a second hound higher up for the longer headstay/furler/lever combo, or b) try to shorten the furler and headstay enough to compensate for the height of the lever, or c) to do none of the above and use less tension (not 300 and 270) on the shrouds and forget about a lever.

I bought a loos gauge and am sorely disappointed on the rigging tension which I thought was okay. It is not. It barely measures anything on the gauge.

[Highlander]

You cannot shorten ur forestay enough with a furler as u cannot shorten the sail foil or u will also have to shorten the foresail too u need to add a second mast hound above the original

J

[Phil M]

I think perhaps you are correct, adding a second mast hound might be the best option. If a swivel is also added to the forestay/furler, how does one determine the proper height above the original mast hound to add the new one? The forestay is at an angle, so there is probably a mathematical way of calculating it.
Anyone who has already done this know the height above the original hound for an ? I want to add a Johnson lever at the bottom and perhaps a swivel shackle at the top.