Author Topic: Adding Stand-up Swivel to cabin top  (Read 723 times)

morganumbcedu

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Adding Stand-up Swivel to cabin top
« on: March 28, 2020, 07:09:04 PM »
 I have a 1983 Pearson 33 and want to bring my main halyard and spin halyard from the mast back to the cock pit. Doing this I will have to add a stand-up swivel halyards on both sides of the mast. I want to know if the cabin top can support the added stress. I plan to use stainless steel backing plates on the cabin underside ceiling to help with the additional stress. Suggestions or thoughts.

Mike

Dolce_Vita

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Re: Adding Stand-up Swivel to cabin top
« Reply #1 on: March 29, 2020, 01:51:05 PM »
If you're a deck-stepped mast, you probably want a halyard organizer plate like this which will keep the stress out of the cabin top:
@(^.^)@  Ed
1977 P-323 #42 "Dolce Vita"
with rebuilt Atomic-4

morganumbcedu

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Re: Adding Stand-up Swivel to cabin top
« Reply #2 on: April 01, 2020, 05:53:25 PM »
Don't have a deck steppedn mast .. any other thoughts besides using the blocks on the deck with backing plates?

Dolce_Vita

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Re: Adding Stand-up Swivel to cabin top
« Reply #3 on: April 02, 2020, 05:48:39 AM »
My P323 also has a keel-stepped mast.  Pearson controlled the vertical deck movement with a tension rod connected from the mast collar all the way down to the mast step in the bilge.  I assume its the same in yours.

This means that ideally, you want the turning blocks somehow attached to the collar.  Otherwise, they should be deck-mounted as close to the collar as possible.

It should be possible to get (or have fabricated) an organizer plate with a hole in it.  Unfortunately, this would require pulling the mast.  Perhaps you could make one that is split in two halves, and lift the collar and install it without removing the mast.

Here's an example of one made by Garhauer.
@(^.^)@  Ed
1977 P-323 #42 "Dolce Vita"
with rebuilt Atomic-4