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post #1 of 7 Old 02-08-2018 Thread Starter
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Mooring pennant design without a ball

We will be on a commercial mooring this summer and have to provide our own pennants.
The boatyard does not use balls (I am told this is to totally avoid the ball slap issue as we will be in a tidal river), only a pick up bouy attached to the pennants.
The river is shallow enough that the swivel will often sit on the bottom.

So the rig is this:
1000lb mushroom>1-1/4" chain>1/2"chain>swivel>pennants

My concern is whether the swivel can effectively prevent the pennants twisting without the ball?

In the past I have been a follower of the unequal length pennant principle.
I'd like to integrate the cyclone pennant idea into my rig as well.
Hoping for equalization and redundancy.
I will do all my own splicing.

Here is my design (see image as well):
two 1" yale esterlon maximoor pennants (1 @ 15', 1 @18') laced together
two 5/8" or 3/4" samson amsteel strops (all 5') with chafe gear per pennant (allowing both pennants to be secured to both bow cleats)

Let me know what you folks think? I am open to adding floats, etc.

Thanks everyone.
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post #2 of 7 Old 02-19-2018
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Hi. I have my boat on a tidal river mooring infront of my house. I designed and installed it myself a few years ago.

I have a similar system sorted out now. I do not run a buoy unless the boat is off mooring. I use a big snap clip to clip buoy on before we set sail.

I have railway wheels to heavy bottom chain, up to 16 meters of 13mm chain then swivel to 6 meters of 24mm 3 strand poly rope (using eyelets and shackles to join the swivel). I have the last 1 meter of poly rope spliced into itself to give me two seperate penant loops that i use to cleat onto my boat. Plus an extra 16mm double braid as a slack backup, that is attached to the swivel also. And "whipped" for want of a better term, to the 24mm rope to keep it all neat. The 16mm double braid has a mid loop to which i clip my buoy on. Works very well.
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post #3 of 7 Old 02-19-2018
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Re: Mooring pennant design without a ball

Try to introduce more stretch. Perhaps, cow hitch an eye in each strop to an eye spliced into one three strand nylon line or lugger line which you run down to the the swivel.

If, like me, you sail up to the mooring avoid any arrangement that requires knots to be untied or snaps to be undone before you drop an eye of a strop on to a cleat. Strive to reduce the complexity at the end of the mooring; cow hitch to the tall buoy to the strop below the point where the strop passes through the chock. I've found it easiest to haul the tall buoy and line outside of the pulpit until the mooring pendent is at the gunwale, reach down and grab the strop, drop the tall buoy back into the river, and get the eye of the strop over cleat.
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post #4 of 7 Old 02-19-2018
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Re: Mooring pennant design without a ball

If there is a 180 degree change in direction of the current and there is a ball float... swivel or not your lines will at some point wrap themselves around the chain... and if the wind kick in they will tighten into a nasty knot.

Try using a single line to the chain which has two lines attached to it,,, abd have floats on that line so it does not sink and wrap under the ball.

Below is the mooring I am having made... for my boat but it's not moored in a river. We have a tide range of 8'.... and winds come from all quadrants.
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post #5 of 7 Old 02-20-2018
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Re: Mooring pennant design without a ball

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Originally Posted by SanderO View Post
abd have floats on that line so it does not sink and wrap under the ball.
When we kept our boat on a mooring, we used pool noodles on the pennant lines and they worked great to prevent wrapping. Also kept the lines floating out straight from the mooring for easier pickup.

Mark

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post #6 of 7 Old 02-20-2018
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Re: Mooring pennant design without a ball

I'd be most concerned with wrapping the mooring chain around the mooring eye and shortening the scope dramatically. Take a look at hellical moorings and the recommended methods, I think spade anchors has a good diagram with a float that suspends the lower pennant so as to prevent wrapping, also Novabraid I believe has a product with a built-in snubber to take the shock loads of hobby horsing that happens in short choppy storm conditions. Pay particular attention to you anchor, bowsprit, pulpit when these conditions are present, ie: remove the anchor, lots of chaffing gear, etc.
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post #7 of 7 Old 02-20-2018
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Re: Mooring pennant design without a ball

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Originally Posted by colemj View Post
When we kept our boat on a mooring, we used pool noodles on the pennant lines and they worked great to prevent wrapping. Also kept the lines floating out straight from the mooring for easier pickup.

Mark
Unfortunately this don't seem to hold up... they do float the normal lines... but i you have heavy hardware not so much. I am going to try this bullet floats and see if there is an improvement. It's not just my boat... many of the boats have the same twisting problem and with a longer painter it wraps the chain under the ball. My approach is the add a line for a named storm to increase the scope.

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